Cheyenne Light, Fuel and Power Transmission System Impact Study

Transcription

1 Cheyenne Light, Fuel and Power Transmission System Impact Study CLPT-G10 80 MW Solar Plant Interconnecting near the South Cheyenne 115 kv Substation Agreement No Laramie County, Wyoming February 12, 2018

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3 Table of Contents 1. Executive Summary Background Definitions Interconnection Customer s Interconnection Facilities Transmission Provider s Interconnection Facilities Network Upgrades Point of Change of Ownership Point of Interconnection Transmission Provider s Interconnection Facilities Project Approach Studies to be Performed Assumptions and Modeling Load Assumptions Generation and Intertie Flow Assumptions Study Process HS Dispatch Case Scenarios LS Dispatch Case Scenarios Facility Ratings Shunt Elements Facility Assumptions Monitored Study Area Power Flow Contingencies Transient Stability Contingencies Criteria Methodology Power Flow Analysis Reactive Power Requirement February 12, 2018 i

4 6.3. Transient Stability Analysis Examination of Results Steady State Results Voltage Issues Summer Peak Base Dispatch Thermal Results Summer Peak Stressed Dispatch Thermal Results Light Summer Base Dispatch Thermal Results Light Summer Stressed Dispatch Thermal Results Unsolved Contingencies in Steady State Analysis Reactive Power Requirement Transient Stability Analysis Results Conclusions Interconnection Customer Interconnection Facilities Transmission Provider s Interconnection Facilities Appendix A: Thermal Results Appendix B: Simulated Contingencies Appendix C: Transient Stability Results Appendix D: Reference Guide for Plots Appendix E: System Diagrams Tables Table 1: Generation for Modeled Cases (MW)... 9 Table 2: Simulated Transient Stability Disturbances Table 3: Outage: TRR-AULT+ARH-AULT DBLCKT Table 4: Transmission Provider s Interconnection Facilities Table 5: Network Upgrades February 12, 2018 ii

5 1. Executive Summary Black Hills Corporation tasked HDR with analyzing the impact on the Cheyenne Light, Fuel and Power (CLFP) transmission system from the interconnection of a PV-solar powered generation facility with a maximum output of 80 MW AC, at a requested Point of Interconnection (POI) near the South Cheyenne 115 kv substation. This study evaluated a valid request from an Interconnection Customer (IC) to provide interconnection service for a proposed generation facility under the guidance of the Cheyenne Light Power Transmission (CLPT) OATT Large Generator Interconnection Procedures (LGIP). This interconnection, CLPT-G10, is located in the CLFP service territory near Cheyenne, WY. The requested commercial operation date is December 31, A 2019 summer peak case and 2019 light summer case were modified to create the 2020 power flow cases used for evaluation. Facility assumptions in the CLFP s 10-Year Transmission Plan were included in this assessment. Figure 1 below shows the CLPT- G10 plant and interconnection details superimposed upon maps of the area. Figure 1: CLPT-G10 Project Layout Relative to the POI February 12,

6 Four alternative cases were created with different dispatch scenarios and evaluated in this analysis. Two scenarios were considered base dispatch and the other two were stressed dispatch. The proposed project was evaluated for impacts assuming Network Resource (NR) interconnection service. The difference in generation assumptions between the scenarios is listed in Table 1. A power flow system intact and N-1 condition analysis was performed on all cases described above. Appendix B lists the set of contingencies that were looked at. The analysis identified thermal overloads with more than 2% distribution factor in the stressed dispatch scenario on non-clfp owned facilities. This included an overload on the Ault Nunn Rockport Owl Creek 115 kv line for the loss of the Archer Ault 230 kv line and the Ault - Terry Ranch 230 kv lines for the light summer stressed scenario. Since this is a third party constraint, the Interconnection Customer must work with the facility owner to identify mitigation measures to eliminate the above listed facility overloads attributed to the proposed generator interconnection. The change in voltage of the area transmission facilities was also monitored. Changes in voltage drops of more than 1% were not encountered in the post-contingent base case voltages verses the post-contingent change case voltages in any scenario. In addition, this analysis included a review of the reactive power requirements to maintain a composite power delivery within a power factor range of 0.95 leading to 0.95 lagging across the entire region of continuous real power output levels at the high side of the generator substation. The results of the reactive power requirement showed that no additional reactors are needed for meeting the 0.95 leading power factor requirements as measured at the 115 kv substation. The results also showed that no additional capacitors are needed to meet the 0.95 lagging power factor requirement as measured at the 115 kv substation. This study included a transient stability analysis. Disturbances listed in Table 2 were simulated with and without the CLPT-G10 project for the 2020 summer peak stressed dispatch and 2020 light summer stressed dispatch scenarios. Parameters plotted for transient stability simulations included rotor angles, bus voltage, and real and reactive power output for a representative set of buses in the study area. No transient stability issues were observed for the proposed project. Detailed results for power flow and stability analyses are included in Section 7. The proposed CLPT-G10 generation project can be accommodated as a Network Resource contingent on completion of the interconnection facilities at an estimated cost of $1,139,535. The lead time for implementing the required upgrades is months. Detailed cost estimates are in Section 8. The associated cost of these upgrades will be the Interconnection Customer s responsibility. February 12,

7 2. Background The CLPT-G10 interconnection represents a new PV-solar generator with a maximum output of 80 MW AC at a POI near the South Cheyenne 115 kv substation. CLPT-G10 is requesting Network Resource (NR) status. 3. Definitions This section includes definitions from the Transmission Provider s Open Access Transmission Tariff (OATT) and pertains to terms used in this report Interconnection Customer s Interconnection Facilities Interconnection Customer s Interconnection Facilities shall mean all facilities and equipment, as identified in Appendix A of the Standard Large Generator Interconnection Agreement, that are located between the Generating Facility and the Point of Change of Ownership, including any modification, addition, or upgrades to such facilities and equipment necessary to physically and electrically interconnect the Generating Facility to the Transmission Provider s Transmission System. Interconnection Customer s Interconnection Facilities are sole use facilities Transmission Provider s Interconnection Facilities Transmission Provider s Interconnection Facilities shall mean all facilities and equipment owned, controlled, or operated by the Transmission Provider from the Point of Change of Ownership to the Point of Interconnection as identified in Appendix A to the Standard Large Generator Interconnection Agreement, including any modifications, additions, or upgrades to such facilities and equipment. Transmission Provider s Interconnection Facilities are sole use facilities Network Upgrades Network Upgrades shall mean the additions, modifications, and upgrades to the Transmission Provider s Transmission System required at or beyond the point at which the Interconnection Facilities connect to the Transmission Provider s Transmission System to accommodate the interconnection of the Large Generating Facility to the Transmission Provider s Transmission System Point of Change of Ownership Point of Change of Ownership shall mean the point, as set forth in Appendix A to the Standard Large Generator Interconnection Agreement, where the Interconnection Customer s Interconnection Facilities connect to the Transmission Provider s Interconnection Facilities. February 12,

8 3.5. Point of Interconnection Point of Interconnection shall mean the point, as set forth in Appendix A to the Standard Large Generator Interconnection Agreement, where the Interconnection Facilities connect to the Transmission Provider s Transmission System Transmission Provider s Interconnection Facilities Transmission Provider s Interconnection Facilities shall mean all facilities and equipment owned, controlled, or operated by the Transmission Provider from the Point of Change of Ownership to the Point of Interconnection as identified in Appendix A to the Standard Large Generator Interconnection Agreement, including any modifications, additions, or upgrades to such facilities and equipment. Transmission Provider s Interconnection Facilities are sole use facilities and shall not include Distribution Upgrades, Stand Alone Network Upgrades, or Network Upgrades. 4. Project Approach 4.1. Studies to be Performed The analysis performed to evaluate the proposed project included: Power Flow Analysis (Category P0, P1, P4, P6, and P7 as defined in NERC Standard TPL-001-4). o As part of the power flow analysis, verification that reactive power requirements are met. Transient stability analysis (Category P0, P1, P4, P6, and P7 as defined in NERC Standard TPL-001-4) Assumptions and Modeling The study timeframe for the CLPT-G10 interconnection in the Black Hills service territory is the summer of The 2019 summer peak case and the 2019 light summer case were used as the starting cases for the summer evaluation, and were each modified to reflect a stressed scenario that were considered for this study. Requested Project Assumptions The scope of work prepared by Black Hills Corporation provided the following project assumptions: The 80 MW solar facility will consist of 76 individual inverter step-up stations rated at MW (1.32 MVA) each with a total plant power factor of 0.80 lead/lag. The facility was set to regulate the 115 kv voltage at the collector substation to 1.01 per unit. February 12,

9 3 mile radial 115 kv interconnection transmission line consisting of 795 ACSR (DRAKE) overhead conductor, rated at 199 MVA between the solar facilities and the POI was assumed. The station transformer high side voltage was set to kv. Dynamic analysis was performed using solar inverter models GEPVG and GEPVE as provided by the customer to represent CLPT-G Load Assumptions The CLFP system load for 2020 study scenarios will be scaled to 2020 peak summer levels and 2020 light summer levels Generation and Intertie Flow Assumptions Generation in the base cases was dispatched using a typical value for the area generators. Refer to Table 1 below for specific generation dispatch levels for each power flow model Study Process Power flow simulations were performed with a base case that had CLPT-G10 in the model, but not in-service. Comparisons were made by turning CLPT-G10 on, and dispatching the 80 MW as a NR against the Wygen generators. Reactive Power Requirement analysis was performed with CLPT-G10 at 100% output (80 MW) and at 20% of output (16 MW). The 16 MW as NR was also dispatched against the Wygen generators HS Dispatch Case Scenarios Figure 2 shows the 2020 heavy summer dispatch scenario comparisons that were evaluated. Wygen units 2 and 3 were reduced to offset the addition of CLPT-G10 as either 20 MW NR or an 80 MW NR. DC ties and other regional dispatch scenarios can influence the results of the analysis. A dispatch scenario was created that reduced TOT3 (as defined in the 2016 WECC Path Rating Catalogue) to 852 MW (N S). For specific changes to dispatch, refer to Table 1. TOT3 was not maintained at 852 after the addition of CLPT-G10. February 12,

10 2020HS Case Base D ispatch Without CLPT Interconnection With CLPT Interconnection Network Resource Unstressed TOT3 Stressed TOT3 B3 Scenario Figure 2: 2020HS Base Dispatch Scenarios LS Dispatch Case Scenarios Figure 3 shows the 2020 light summer dispatch scenario comparisons that were evaluated. Wygen units 1 and 2 were reduced to offset the addition of CLPT-G10 as either 20 MW NR or an 80 MW NR. DC ties and other regional dispatch scenarios can influence the results of the analysis. A dispatch scenario was created that increased TOT3 to 1658 MW (N S). For specific changes to dispatch, refer to Table 1. TOT3 was not maintained at 1658 after the addition of CLPT-G LS Case Base D ispatch Without CLPT Interconnection With CLPT Interconnection Network Resource Unstressed TOT3 Stressed TOT3 A1 Scenario Figure 3: 2020LS Dispatch Case Scenarios February 12,

11 Table 1 provides specific generation dispatch levels of notable generators in Black Hills region for each power flow case used for this study. Table 1: Generation for Modeled Cases (MW) 2020 LS w/ G10 as NR with Stressed TOT LS w/o G10 as NR with Stressed TOT LS w/ G10 as NR 2020 LS w/o G10 as NR 2020 HS w/ G10 as NR with Stressed TOT HS w/o G10 as NR with Stressed TOT HS w/ CLPT-G HS w/o CLPT-G10 CLPT-G CPGS Block CPGS Block CPGS Block Wygen Wygen # Wygen # CLPT-G CLPT-G CLPT-G Happy Jack Silver Sage Glen Rock Seven Mile Hi Plane Threb Top of the World Comanche Comanche # Comanche # Comanche PV LRS Unit LRS Unit # Dave Johnston Unit Dave Johnston Unit # Dave Johnston Unit # Dave Johnston Unit # February 12,

12 2020 LS w/ G10 as NR with Stressed TOT LS w/o G10 as NR with Stressed TOT LS w/ G10 as NR 2020 LS w/o G10 as NR 2020 HS w/ G10 as NR with Stressed TOT HS w/o G10 as NR with Stressed TOT HS w/ CLPT-G HS w/o CLPT-G10 CPP (Brush) Rawhide Rawhide solar DNLP Pawnee Manchief RMEC Craig Hayden Spring Canyon Wind Ridgecrest Wind Peetz-Logan Wind St. Vrain Unit St. Vrain Unit # St. Vrain Unit # St. Vrain Unit # St. Vrain Unit # St. Vrain Unit # Rapid City DC tie Stegall DC tie Sidney DC tie TOT3 Flow (N-S) Facility Ratings Continuous and short-term facility ratings were observed as requested by the affected transmission owners throughout the analysis. BHCE observes Rate A for all events, with the exception of transformers, which have a 30-min rating of 125% of the continuous rating following contingencies. Delta Voltage changes of less than 1% from base model to CLPT-G10 model were neglected. Distribution factors (DF) of less than 2% of CLPT- G10 output on any given branch were also neglected. February 12,

13 4.7. Shunt Elements All in-service and planned switched shunt elements were modeled in the case. Shunt devices that are automatically switched were modeled as such and allowed to operate following contingencies. All manually switched shunt devices were allowed to switch prior to a disturbance and fixed at that pre-disturbance level following contingencies Facility Assumptions The following project assumptions in CLFP 10-Year Transmission Plan were applied to the 2020 scenario assessment: King Ranch 115 kv substation is in-service. Corlett 115 kv substation upgrades are completed. CLPT-G7 was modeled online at 102 MW. CLPT-G8 was modeled online at 150 MW. CLPT-G9 was modeled online at 75 MW. King Ranch West Cheyenne Swan Ranch South Cheyenne 115 kv line was modeled as reconductored to 1103 ACCC as required for CLPT-G8. TSGT s Wayne Child project was not modeled. CLPT-G6 was not modeled Monitored Study Area The subsystem of interest for the analyses consisted of all 115 kv and above buses in an area bound by Miracle Mile to the west, Dave Johnston to the north, Sidney to the east, and Ault to the south. All TOT3 elements were monitored. A file including these buses was provided by Black Hills Engineering Power Flow Contingencies The NERC Standard TPL Category P0, P1, P4, P6, and P7 events to be simulated, as part of the power flow analysis, were provided by Black Hills Engineering: Category P0 is system intact, so no files were required, and Category P1, P4, P6, and P7 events were defined and provided in a file. The contingencies are listed in Appendix B: Simulated Contingencies Transient Stability Contingencies The events that were simulated as part of the transient stability analysis are listed in Table 2. If the simulation of a 3-phase disturbance results in performance that does not meet performance criteria, the appropriate single line-to-ground (SLG) disturbance will be simulated to verify acceptable performance per TPL-001-WECC-CRT-3 and NERC TPL February 12,

14 5. Criteria The "NERC TPL" Standards criteria regarding loss of load and system instability were observed in all cases. Additionally, the criteria specified in the System Performance TPL-001- WECC-CRT-3 WECC Criterion were observed. The minimum first-swing voltage for transient stability simulations in the study area is 0.70 per unit. The P1 contingency voltage deviation limit is 8%. Relative steady state voltage change was limited to 3% of the nominal voltage for system intact conditions, and was limited to 5% under outage conditions. The relative steady state voltage change is the difference in voltage before and after an event, such as capacitor switching, load switching, transmission line tripping, or large motor starting. The steady-state voltages at all applicable Bulk Electric System (BES) buses shall stay within each of the following limits: 95 percent to 105 percent of nominal for P0 events. 90 percent to 110 percent of nominal for P1-P7 events. For determination of the effect CLPT-G10 will have on voltage change (delta V), only degradation of the delta V was listed as a violation. For example, the delta V in some base case simulations was greater than 5%; so no remedy would be called out in the case of delta V being less than 7% in the base case and less than 6% in the change case. In this analysis, and for this example contingency, only a delta V greater than 7% with CLPT-G10 would be considered as a violation. The CLPT-G10 is required to maintain a composite reactive delivery at continuous rated power output at the generator substation high side at a power factor within the range of 0.95 leading to 0.95 lagging, across the range of near 0% to 100% of facility MW rating, with the magnitude of reactive power calculated on the basis of nominal POI voltage (1.0. p.u.). The design shall consider the effects of the step-up transformer reactance and voltage taps/turns ratios, and bus-fed auxiliary load. The disturbances that were evaluated in the transient stability analysis are listed on Table 2. The transient stability simulations were run to 15 seconds to ensure a sufficient damping response. All events assumed a 3-phase fault with normal clearing. In the event that acceptable performance was not achieved, the reduced impedance SLG fault would be applied as required in TPL Methodology 6.1. Power Flow Analysis Examination of Table 1 above details how the area generation was dispatched for each case. All the cases were subjected to outages as defined in the contingency file. The results were compared between the base cases and the post project cases where CLPT- G10 was in-service for analysis. The results of the steady state analysis are described in Section 7. February 12,

15 6.2. Reactive Power Requirement Proposed projects requesting interconnection are required to maintain a composite reactive delivery at continuous rated power output at the generator substation high side at a power factor within the range of 0.95 leading to 0.95 lagging. This must be across the range of near 0% to 100% of facility MW rating, with the magnitude of reactive power calculated on the basis of nominal POI voltage (1.0 p.u.). The project design will consider the effects of step-up transformer reactance and voltage taps/turn ratios, and bus-fed auxiliary load. To analyze this requirement, CLPT-G10 s output was set to ensure to maximum capacity limit of CLPT-G10 to produce reactive power (Qmax) onto the system would be reached. Any corresponding deficiency in VAR flow from the 115 kv substation toward the solar plant would be augmented with a capacitor on CLPT-G kv substation to meet the 0.95 lagging power factor requirement. This analysis was performed with CLPT-G10 at an output of 20% (16 MW) and at an output of 100% (80 MW). In a similar fashion, CLPT-G10 was analyzed at a range of output for CLPT-G10 to absorb reactive power (Qmin). Any corresponding deficiency in VAR flow from the 115 kv substation toward the solar plant would be augmented with a reactor on CLPT-G kv substation to meet the 0.95 leading power factor requirement. This analysis was performed with CLPT-G10 at an output of 20% (16 MW) and at an output of 100% (80 MW). The reactive capabilities for the proposed project was modeled in the power flow cases assuming 0.8 leading and 0.8 lagging power factor based on the information provided by the Interconnection Customer. The results of reactive power analysis are examined in Section Transient Stability Analysis Transient stability is the ability of generators to remain in synchronism with one another by surviving the first swing of a disturbance such as a 3-phase fault or SLG fault. Transient stability also simulates the ability of the power system to return to a steadystate equilibrium under small signal or large signal transient disturbances. The purpose of this report is to present the results of the stability analysis performed to evaluate the impact of the proposed CLPT-G10 project on Black Hill s transmission system dynamic performance. The following stability modeling changes were applied to the original dynamic model: Due to the proximity of Happy Jack wind farm and Silver Sage wind farm to CLPT- G10, as shown via system diagrams in Appendix E, these units were added to the snap shot as generic type 2 wind turbines. Add CLPT-G7 dynamic model to the snapshot due to its proximity to CLPT-G10. Add CLPT-G8 dynamic model to the snapshot due to its proximity to CLPT-G10. February 12,

16 Add CLPT-G9 dynamic model to the snapshot due to its proximity to CLPT-G10. Turn off out of step relay models for offline transmission lines. Turn off Belle Creek DVAR model per Black Hills Engineers recommendation because it was deemed far enough away from the project area to not affect the results. The disturbances to be evaluated in the transient stability analysis are identified in Table 2. These disturbances were simulated out to 15 seconds to ensure a sufficient damping response from the system. All events, unless specifically identified, assumed a 3-phase fault with normal clearing. In the event that acceptable performance was not achieved, the reduced impedance SLG fault would be applied as required in NERC Reliability Standard TPL Parameters to be plotted for transient stability simulations included rotor angles, bus voltages, real and reactive output for a representative set of buses in the study area. The list of parameters that were explicitly plotted for this analysis are in Appendix D. The transient stability results are examined in Section 7.2. Table 2: Simulated Transient Stability Disturbances Disturbance Description 3Ф Faulted Bus Cleared Element Fault Duration (cy) System Intact None None NA Archer-Cheyenne 115 Archer 115 CPGS-Archer 115 CPGS 115 CPGS-Archer 115 1&2 CPGS 115 CPGS-East Business Park 115 CPGS 115 Happy Jack-Cheyenne 115 Happy Jack 115 Happy Jack-Happy Jack Wind 115 Happy Jack 115 Happy Jack-North Range 115 Happy Jack 115 HJK-NRG 115 PO + SCH 230/115 XFMR South Cheyenne 115 Archer-Cheyenne 115 kv line CPGS-Archer 115 kv line CPGS-Archer + CPGS- EBP 115 kv lines CPGS-East Business Park 115 kv line Happy Jack-Cheyenne 115 kv line Happy Jack-Happy Jack Wind 115 kv line Happy Jack-NCAR 115 kv line South Cheyenne 230/115 kv XFMR South Cheyenne-Swan Ranch 115 South Cheyenne 115 South Cheyenne-Swan Ranch 115 kv line 5 SCH-COR 115 PO + SCH-SWR 115 South Cheyenne 115 South Cheyenne-Swan Ranch 115 kv line 5 South Cheyenne-Corlett-North Range 115 South Cheyenne 115 South Cheyenne-Corlett- North Range 115kV line 5 Archer-Ault 230 Archer 230 Archer-Ault 230 kv line 5 Archer-Terry Ranch 230 Archer 230 ACH-TR 230 PO + ARH 230/115 XFMR Archer 230 Archer-Terry Ranch 230 kv line Archer 230/115 kv XFMR 5 5 February 12,

17 Disturbance Description 3Ф Faulted Bus Cleared Element Fault Duration (cy) ACH-TR 230 PO + ARH-CHY 115 Line Archer 230 ACH-TR 230 PO + ARH-CPGS 115 Line Archer 230 Archer-Stegall 230 Archer 230 Cheyenne-Terry Ranch 230 Cheyenne 230 Cheyenne-Snowy Range 230 Cheyenne 230 Archer-Cheyenne 115 kv line Archer-CPGS 115 kv line Archer-Stegall 230 kv line Cheyenne-Terry Ranch 230 kv line Cheyenne-Snowy Range 230 kv line Snowy Range-Miracle Mile 230 Snowy Range 230 Snowy Range-Miracle Mile 230 kv line 5 Terry Ranch-Ault 230 Terry Ranch 230 Terry Ranch-North Park 230 Terry Ranch 230 Laramie River Station-Ault 345 Laramie River Stn. 345 Archer-Wayne Child 230 Archer 230 Terry Ranch-Ault 230 kv line Terry Ranch-North Park 230 kv line Laramie River Station- Ault 345 kv line Archer-W. Child 230 kv line LRS-Keota 345 (No WC PH2) LRS LRS-Keota 345 kv 4 Cheyenne 230/115 XFMR Cheyenne 230 Archer 230/115 XFMR Archer 230 Cheyenne 230/115 XFMR Archer 230/115 XFMR Examination of Results 7.1. Steady State Results Voltage Issues No pre- or post-contingent voltage impacts with a change in voltage between the base case and change case was greater than 1% were found in any scenario Summer Peak Base Dispatch Thermal Results There were no thermal loading issues identified for system intact and N-1 conditions in this scenario Summer Peak Stressed Dispatch Thermal Results There were no thermal loading issues identified for system intact and N-1 conditions in this scenario. System diagrams of system intact conditions with CLPT-G10 offline and online can be found in Appendix E for this scenario. February 12,

18 Light Summer Base Dispatch Thermal Results There were no thermal loading issues identified for system intact and N-1 conditions in this scenario Light Summer Stressed Dispatch Thermal Results There were no system intact thermal loading issues identified in this scenario. An overload was identified on the Ault Nunn - Rockport Owl Creek 115 kv line for the outage of the Archer Ault Terry Ranch 230 kv line as shown in Table 3. This is a non-clpf owned line, the Interconnection Customer must work with the facility owner in order to identify mitigation measures to eliminate the facility overloads. System diagrams of system intact conditions with CLPT-G10 offline and online can be found in Appendix E for this scenario. Table 3: Outage: TRR-AULT+ARH-AULT DBLCKT OPEN BRANCH FROM BUS [ARCHER ] TO BUS [AULT ] CKT 1 OPEN BRANCH FROM BUS [AULT ] TO BUS [TERRY_RANCH ] CKT 1 TRR-AULT+ARH-AULT DBLCKT Case Rating Post Contingent Loading Base Load Pre CLPT- G10 Change Load Post CLPT- G10 Nunn - Ault 115 kv ckt LS 1658TOTs NR Nunn - Rockport 115 kv ckt LS 1658TOTs NR Rockport - Owl Creek 115 kv ckt LS 1658TOTs NR More complete tables, showing facility loadings above 80% for the base dispatch scenarios and stressed dispatch scenarios, are provided in Appendix A Unsolved Contingencies in Steady State Analysis There were no unsolved contingencies identified in the steady state analysis Reactive Power Requirement Based on data supplied by the Transmission Owner, Black Hills, and the results of this analysis, the proposed project does not need supplemental reactive voltage support equipment to meet these requirements. The results showed that CLPT-G10 could meet the 0.95 leading power factor requirement as measured at the 115 kv substation at both an output of 20% (16 MW) and at an output of 100% (80 MW). CLPT-G10 was also able to meet the 0.95 lagging power factor requirement as measured at the 115 kv substation at both an output of 20% (16 MW) and at an output of 100% (80 MW). If the Transmission Provider requires additional reactive power support or voltage regulation to mitigate known system weaknesses, the Transmission Provider will February 12,

19 negotiate with the generator owner for any additional capability beyond the minimum requirements stated above Transient Stability Analysis Results Disturbances listed in Table 2 were simulated out to 15 seconds with and without the CLPT-G10 project for the 2020 summer peak stressed dispatch scenario and 2020 light summer stressed dispatch scenario. Transient Stability Analysis was not performed on the base dispatch scenarios. Parameters that were plotted for transient stability simulations included rotor angles, bus voltage, and real and reactive power output for a representative set of buses in the study area. The list of parameters that were explicitly plotted for this analysis are identified in Appendix D. No transient stability issues were observed due to the proposed project. Detailed results are listed in Appendix C of the report. 8. Conclusions The CLPT-G10 solar project can be operated at the requested additional capacity of 80 MW as a Network Resource contingent upon the following. There were no identified voltage violations as a result of the proposed project interconnection in any of the scenarios studied. In the 2020 light summer stressed dispatch scenario, an overload was identified on the Ault Nunn - Rockport Owl Creek 115 kv line. Since this is a non-clfp owned facility, the Interconnection Customer must work with the facility owner in order to identify mitigation measures to eliminate the overloads attributed to the proposed generator interconnection. The results of the reactive power requirement showed that no additional reactors are needed for meeting the 0.95 leading power factor requirements as measured at the 115 kv substation. The results also showed that no additional capacitors are needed for meeting the 0.95 lagging power factor requirement as measured at the 115 kv substation. No transient stability issues were observed due to the proposed project Interconnection Customer Interconnection Facilities The IC Generation Facility collector substation shall be designed to include one 115 kv breakered line position to accommodate the generator tie line between the collector substation and the South Cheyenne 115 kv substation designated as the POI. The generation tie line was assumed to be 3 miles long and constructed using 795 ACSR Drake conductor on single circuit structures for this study. These facilities are the responsibility of the IC, and no additional facilities are specified here. February 12,

20 8.2. Transmission Provider s Interconnection Facilities Transmission Provider Interconnection Facility costs apply to facilities and equipment required by the TP and owned and operated by the TP. This equipment is typically located between the Point of Change of Ownership and the Point of Interconnection. The costs for these facilities are paid by Customer. Table 4: Transmission Provider s Interconnection Facilities Facility Upgrade Description Cost Estimate South Cheyenne 115 kv substation terminal New equipment includes 1 disconnect switch, 1 dead end, 3 primary metering instrument transformers and associated metering, site work, miscellaneous structural steel & cable trenching, etc. Implementation Timeframe $736, months South Cheyenne 115 kv substation New phasor data concentrator $60, months Total: $796, months 8.3. Network Upgrades Network Upgrades shall mean the additions, modifications, and upgrades to the Transmission Provider s Transmission System required at or beyond the point at which the Interconnection Facilities connect to the Transmission Provider s Transmission System to accommodate the interconnection of the Generating Facility to the Transmission Provider s Transmission System. Black Hills would design and construct one (1) 115 kv, 2000 Amp transmission line terminal addition onto the existing South Cheyenne substation 115 kv bus. This terminal addition would be added onto the south end of the existing substation 115 kv bus arrangement, orientated in the same layout and direction as the existing transmission line terminals. The 115 kv terminal addition would include 2 substation breakers, 4 group operated disconnect switches, transmission line A-frame takeoff structure, equipment support structures, terminal lightning arresters, overhead shielding, bus work, revenue-grade metering, and terminal control & protection systems. Necessary modifications to the substation common equipment, cable trench, grounding system, and yard finish are included. February 12,

21 Table 5: Network Upgrades Facility Upgrade Description Cost Estimate Implementation Timeframe South Cheyenne 115 kv substation Additional bay consists of kv circuit breakers, 4 disconnect switches, miscellaneous structural steel & cable $1,249, months trenching, etc. 1 Total: $1,249, Months Note: It was assumed that network upgrades associated with prior queued requests were in place for this analysis. In the event that those prior queued requests are not constructed, additional network upgrades are needed to accommodate this request. 1 All upgrade costs related to civil work and transmission line relocations are not included for and remain to be determined pending the customers civil work analysis. February 12,

22 Appendix A: Thermal Results Facilities with a loading above 80% and with distribution factor over 2% are listed below. There were no voltage violations G7WNDHI G7WNDMID WD CH-HJ+CH-SNOWY DBLCKT 2.39% 88.84% G7WNDHI G7WNDMID WD GEMCTYTP SNOWYRNG % 87.86% G7WNDHI G7WNDMID WD CHEY-TR+CHEY-OWL DBLCKT 2.06% 87.65% G7WNDHI G7WNDMID WD G7WNDHI G7WNDMID WD WARRENLM NORTHRNG CHEYENNE HAPPYJCK CHEYENNE TERRY_RANCH CHEY_S CORLETT CHEYENNE HAPPYJCK WARRENLM NTHRNGE % 87.32% 2.05% 86.86% 15.91% 85.74% 29.06% 84.31% 2020HS Base Case Compared to Change Case with CLPT-G10 in-service at 80 MW dispatched as NR. No Change to TOT3. CLPT-G10 Without With Facility Rating CLPT- CLPT- 80 MW Project Contingency G10 G10 MVA Loading MVA Loading Distribution Factor Loading % 2020HS Base Case Compared to Change Case with CLPT-G10 in-service at 80 MW dispatched as NR. TOT3 at 852 MW (N S) CLPT-G10 Without With CLPT- CLPT- 80 MW Project Facility Rating G10 G10 Contingency MVA Loading MVA Loading WARRENLM NORTHRNG CHEYENNE HAPPYJCK CHEYENNE HAPPYJCK WARRENLM NTHRNGE Distribution Factor Loading % 15.95% 90.29% 29.30% 89.07% February 12,

23 2020LS Base Case Compared to Change Case with CLPT-G10 in-service at 80 MW dispatched as NR. No Change to TOT3. Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading CLPT-G10 80 MW Project Distribution Factor CHEYENNE HAPPYJCK SCHEY-LGIRG7 115 DBLCKT 63.71% 89.91% W.CHEY KINGRNCH CHEY_S SWANRNCH Loading % 97.05% 89.33% W.CHEY KINGRNCH SCHEY-LGIRG7 115 DBLCKT 97.00% 89.21% G7WNDHI G7WNDMID WD TRR-AULT+ARH-AULT DBLCKT 2.60% 86.83% G7WNDHI G7WNDMID WD CHEYENNE HAPPYJCK % 86.06% W.CHEY CL-G8_G9_POI G7_GEN G % 85.40% W.CHEY CL-G8_G9_POI LGIR-G CHEY_W % 85.25% W.CHEY CL-G8_G9_POI LGIR-G % 85.25% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI SNOWYRNG SNOWYRNG SNG_LV B #2 HAPPYJCK HJWIND SSWIND HJWIND % 85.22% 98.23% 85.20% 98.23% 85.19% W.CHEY CL-G8_G9_POI SS_GEN % 85.19% W.CHEY CL-G8_G9_POI CLR_ % 85.18% W.CHEY CL-G8_G9_POI G HJWIND % 85.18% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI WELD_PS WELD LM GEMCTYTP SPRINGCK ALCOVA FREMONT COBBLKTP COBBLAKE ROUNDTOP SENTINEL LARAMIE SNOWYRNG SEMINOE SMNOE WINDSOR WINDSORT % 85.18% 98.22% 85.17% 98.22% 85.17% 98.22% 85.17% 98.22% 85.17% 98.21% 85.17% 98.22% 85.17% 98.22% 85.17% February 12,

24 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading CLPT-G10 80 MW Project Distribution Factor W.CHEY CL-G8_G9_POI AULT WELD LM % 85.17% W.CHEY CL-G8_G9_POI AULT WELD LM # % 85.17% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI FLATIRON POLEHILL DIXON CK HRSTHTAP Loading % 98.22% 85.17% 98.22% 85.17% W.CHEY CL-G8_G9_POI FREMONT % 85.17% W.CHEY CL-G8_G9_POI FREMONT % 85.17% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI FREMONT FREMONT FREMONT FREMONT BERTHOUD LONTRETP WELD LM WHITNEY % 85.17% 98.22% 85.17% W.CHEY CL-G8_G9_POI BOYD LONTRETP W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI HARVARD LNGMNTNW LYONS DOWE FLATS W.CHEY CL-G8_G9_POI SEMINOE W.CHEY CL-G8_G9_POI SMNOE W.CHEY CL-G8_G9_POI SMNOE W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI SEMINOE SEMINOE HARMONY TIMBERLN RICHARDS WAVER PV DEL CTAP LONGPEAK STEGALL LINGLETP DOWE FLATS ROCKMTCM ALCOVA ALCOVA February 12,

25 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading CLPT-G10 80 MW Project Distribution Factor W.CHEY CL-G8_G9_POI ALCOVA W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI LYMANTP WHTROCK KORTES KORTES KORTES KORTES KORTES KORTES Loading % W.CHEY CL-G8_G9_POI KORTES W.CHEY CL-G8_G9_POI KORTES W.CHEY CL-G8_G9_POI KORTES W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI HORSESHO LOVE W FLATIRON HRSTHTAP BERTHOUD LONETREE DAVEJOHN DAVEJTPN W.CHEY CL-G8_G9_POI ALCOVA W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI ALCOVA ALCOVA HRSTHTAP TRILBY W.CHEY CL-G8_G9_POI GLENDO W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI DAVEJOHN BIXBY DAVEJTPN WAGHN NT BIXBY DAVEJTPS W.CHEY CL-G8_G9_POI GLENDO W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI STEGALL LYMANTP GLENDO GLENDO W.CHEY CL-G8_G9_POI GLENDO GLENDO February 12,

26 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI SLATERTS DEL CTAP GLENDO WAGHN ST DAVEJTPS WAGHN ST GLENDO WHTROCK LOVE W LOVEWTAP SLATERTS DELCAMIN GLENDO WAGHN NT CLPT-G10 80 MW Project Distribution Factor Loading % CPGSTN_1 CPGSTN_2 GUERNTAP WHTROCK MYERS MYERS TP GLENDO GUERNTAP HYGIENE LNGMNTNW LINGLE LINGLETP LINGLETP WHTROCK HYGIENE LYONS CASPERLM DAVEJTPN DELCAMIN RINNVALL DRAKE RD TIMBERLN LONGPEAK CNTYLINE DEL CTAP MEADOW February 12,

27 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading SPRINGCK FTSANDER TIMNATH RICHRDTP TERRY CNTYLINE MIRACLEM MIRACLEM MM_LV A MIRACLEM MIRACLEM MM_LV B #2 DAVEJTPS REFNRYTP CASPERPP REFNRYTP LAR.RIVR LAR.RIVR TIMNATH BOXELDER LNGMNTNW GLDNPNDS DERBYHIL DERBHILT LONGPEAK LONGPEAK LONGPEAK LONGPEAK #2 WHEATLND LAR.RIVR ALCOVA MIRACLEM ALCOVA MIRACLEM #2 HRSTHTAP MASONVIL DIXON CK POUDRE CLPT-G10 80 MW Project Distribution Factor Loading % KELIM AIRPORT WINDSOR AULT KORTESTP SEMINOE LINDEN RICHARDS February 12,

28 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading CLPT-G10 80 MW Project Distribution Factor BOYD LOVE E CARR DRA BARBERCK Loading % TERRY ERIE SW MED BOW MEDBOWTP MARYLKSB MARYLKTP RAWHIDEC RAWHIDE #UC LAR.RIVR LAR.RIVR LAR.RIVR LAR.RIVR #2 MARYLKSB MARYLKSB BASE CASE ESTES MARYLKSB ESTES MARYLKTP TERRY GLDNPNDS MEDBOWHS MEDBOWTP PUMPKIN BARBERCK RAWHIDEA RAWHIDE #UA RAWHIDEF RAWHIDE #UF RAWHIDED RAWHIDE #UD RAWHIDEB RAWHIDE #UB BOYD DERBHILT KODAK WHITNEY KODAK WHITNEY #2 February 12,

29 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading BRACEWLL WHITNEY BRACEWLL WHITNEY #2 HORSESHO HORSESHO HORSESHO HORSESHO #2 BRIGHTNW ERIE SW BELLEVUE BELLVUTP BELLVUTP RIPPLE VALLEYLM DERBHILT RINNVALL DACONO TIMBERLN TIMBERLN #3 BRIGHTNW SANDCRK WELD LM BOOMERNG EMIGRNT EMI TAP CLPT-G10 80 MW Project Distribution Factor Loading % BOYD VALLEYLM LAPORTE BELLVUTP DIXON CK DRAKE RD LNGMNTNW MEADOW KORTES MIRACLEM CASPERPP CASPER_TP GUERNSY GUERNSY GUERNTAP GUERNRRL February 12,

30 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading WINDSORT WHITNEY ROGERSRD GLDNPNDS FORDHAM ROGERSRD KORTES KORTESTP FORDHAM FORDHAM #2 FORDHAM FORDHAM ARCHER WAYNECHILD CLPT-G10 80 MW Project Distribution Factor Loading % BOYD BOYD WINDSTAR PUMPKIN ESTES POLEHILL TEKLA PUMPKIN BOYD BOYD #2 LIMESTON LIMESTON GUERNTAP LIMESTON MCKENZIE MARYLKSB WHTROCK WHTROCK NTHRNGE CORLETT SNOWYRNG SNOWYRNG SNG_LV A MAY OASISTAP DIXON CK DIXON CK DIXON CK DIXON CK #2 SEMINOE SEMINOTP February 12,

31 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading MARYLKPP MARYLKTP MARYLKPP MARYLKPP MIRACLEM SEMINOTP W.CHEY CL-G8_G9_POI FORDHAM TERRY W.CHEY CL-G8_G9_POI GLENDO PODOLAK W.CHEY CL-G8_G9_POI KORTESTP MIRACLEM W.CHEY CL-G8_G9_POI JACKLOPE WARMSPGS W.CHEY CL-G8_G9_POI WARMSPGS EMI TAP W.CHEY CL-G8_G9_POI POLE CK QUALLS W.CHEY CL-G8_G9_POI OASISTAP MEDBOWTP W.CHEY CL-G8_G9_POI WELD LM WELD LM W.CHEY CL-G8_G9_POI WAGNHNDS WAGHN NT W.CHEY CL-G8_G9_POI WAGNHNDS EMI TAP CLPT-G10 80 MW Project Distribution Factor Loading % 98.24% 85.16% W.CHEY CL-G8_G9_POI FLATIRN W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI MIRACLEM MEDBOWTP LOVE E CROSSRDS TIMBERLN TIMBERLN # W.CHEY CL-G8_G9_POI ESTES ESTES W.CHEY CL-G8_G9_POI ESTES ESTES W.CHEY CL-G8_G9_POI ESTES ESTES W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI HORSESHO CROSSRDS POLEHILL POLEHILL February 12,

32 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading CLPT-G10 80 MW Project Distribution Factor W.CHEY CL-G8_G9_POI POLEHILL W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI DACONO ERIE SW ALCOVA CASPERLM ALCOVA CASPERLM #2 LYMAN LYMANTP WELD_PS WELD LM LYONS WAGONWHL BOYD LONGPEAK ESTES WAGONWHL Loading % W.CHEY CL-G8_G9_POI ARCH-CHEY N&S % 85.16% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI LOVEWTAP VALLEYLM AIRPORT WINDSORT W.CHEY CL-G8_G9_POI AULT AULT # W.CHEY CL-G8_G9_POI BOYD PORTNER W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI POUDRE RICHRDTP DIXON CK COLLEGLK LINDEN TIMBERLN LAPORTE TIMBERLN W.CHEY CL-G8_G9_POI AULT AULT W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI CHEYENNE CROWCRK LAPORTE RAWHIDE W.CHEY CL-G8_G9_POI FLATIRN February 12,

33 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading CLPT-G10 80 MW Project Distribution Factor W.CHEY CL-G8_G9_POI FLATIRN W.CHEY CL-G8_G9_POI BLKHLWTP AULT W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI CARTERLK LOVEWTAP LAPORTE COLLEGLK HARMONY PORTNER BLKHLWTP COBBLKTP FLATIRON FLATIRN ST.VRAIN LONGPEAK Loading % 98.22% 85.15% W.CHEY CL-G8_G9_POI AULT AULT # % 85.15% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI CARTERLK FLATIRON LAR.RIVR MBPP FLATIRON FLATIRN LAPORTE RAWHIDE #2 ALCOVA RADERVIL CASPER_TP CASPERLM % 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% W.CHEY CL-G8_G9_POI AULT AULT % 85.15% W.CHEY CL-G8_G9_POI MBPP % 85.15% W.CHEY CL-G8_G9_POI AIRPORT BOYD % 85.15% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI ARCHER CHEYENNE RAWHIDE TIMBERLN DIXON CK HORSESHO ARCHER CROWCRK % 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% February 12,

34 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading W.CHEY CL-G8_G9_POI PONNEQUI OWL_CRK W.CHEY CL-G8_G9_POI POLE CK ROUNDTOP W.CHEY CL-G8_G9_POI COBBLKTP TIMNATH W.CHEY CL-G8_G9_POI ARCHER ARCHER ARH_LVB # W.CHEY CL-G8_G9_POI CHEY_S CORLETT W.CHEY CL-G8_G9_POI ST.VRAIN FORDHAM W.CHEY CL-G8_G9_POI ARCHER PINEBLUF W.CHEY CL-G8_G9_POI CHEYENNE CHEYENNE CH 13.8B # W.CHEY CL-G8_G9_POI CHEYENNE CHEYENNE CH 13.8A W.CHEY CL-G8_G9_POI CHEYENNE PONNEQUI W.CHEY CL-G8_G9_POI LARAMIE OASISTAP CLPT-G10 80 MW Project Distribution Factor Loading % 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% 98.23% 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% 98.22% 85.15% W.CHEY CL-G8_G9_POI AULT RAWHIDE % 85.15% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI ARCHER TERRY_RANCH GEMCTYTP SNOWYRNG WARRENLM NTHRNGE BUSHNLTP PINEBLUF ARCHER MYERS TP LAR.RIVR STEGALL ARCHER ARCHER ARH 13.8A LAGRANGE ROUNDTOP MYERS TP POLE CK % 85.15% 98.22% 85.15% 98.20% 85.15% 98.22% 85.15% 98.22% 85.15% 98.23% 85.15% 98.22% 85.15% 98.22% 85.14% 98.22% 85.14% W.CHEY CL-G8_G9_POI DAVEJOHN LAR.RIVR % 85.14% February 12,

35 Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading CLPT-G10 80 MW Project Distribution Factor Loading % W.CHEY CL-G8_G9_POI KEOTA STORY % 85.14% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI LAGRANGE STEGALL LAR.RIVR MBPP % 85.14% 98.23% 85.14% W.CHEY CL-G8_G9_POI MBPP % 85.14% W.CHEY CL-G8_G9_POI NUNN AULT % 85.13% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI NUNN ROCKPRTP ROCKPRTP OWL_CRK CPGSTN EB PARK CHEY_S TERRY_RANCH CHEYENNE SNOWYRNG TERRY_RANCH NORTH PARK CHEY_S SWANRNCH CHEYENNE TERRY_RANCH ARCHER STEGALL ARCHER CPGSTN % 85.13% 98.22% 85.13% 98.22% 85.13% 98.22% 85.13% 98.24% 85.13% 98.23% 85.13% 98.22% 85.13% 98.23% 85.13% 98.23% 85.12% 98.23% 85.12% W.CHEY CL-G8_G9_POI ARCHER AULT % 85.12% W.CHEY CL-G8_G9_POI CHEY-TR+CHEY-OWL DBLCKT 98.22% 85.11% W.CHEY CL-G8_G9_POI AULT CRAIG % 85.11% W.CHEY CL-G8_G9_POI AULT LAR.RIVR % 85.10% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI SNOWYRNG MIRACLEM AULT TERRY_RANCH RAWHIDE RAWHIDE #U % 85.10% 98.22% 85.10% 98.25% 85.09% February 12,

36 CLPT-G10 80 MW Project Distribution Factor W.CHEY CL-G8_G9_POI CH-HJ+CH-SNOWY DBLCKT 98.24% 85.09% W.CHEY CL-G8_G9_POI SCHEY-LGIRG7 115 DBLCKT 98.20% 85.09% W.CHEY CL-G8_G9_POI W.CHEY CL-G8_G9_POI HAPPYJCK NORTH RANGE CHEYENNE HAPPYJCK Loading % 98.18% 85.07% 98.18% 85.05% W.CHEY CL-G8_G9_POI TRR-AULT+ARH-AULT DBLCKT 98.22% 85.03% ROCKPRTP OWL_CRK TRR-AULT+ARH-AULT DBLCKT 14.83% 81.16% NUNN ROCKPRTP TRR-AULT+ARH-AULT DBLCKT 15.03% 80.48% Without With Facility Rating CLPT- CLPT- G10 G10 Contingency MVA MVA Loading Loading 2020LS Base Case Compared to Change Case with CLPT-G10 in-service at 80 MW dispatched as NR. TOT3 at 1657 MW (N-S). CLPT- G10 Without With Facility Rating CLPT- CLPT- Contingency 80 MW Project G10 G10 MVA Loading MVA Loading Distribution Factor ROCKPRTP OWL_CRK TRR-AULT+ARH-AULT DBLCKT 13.46% % NUNN ROCKPRTP TRR-AULT+ARH-AULT DBLCKT 13.61% % NUNN AULT TRR-AULT+ARH-AULT DBLCKT 13.93% % ROCKPRTP OWL_CRK AULT TERRY_RANCH % 85.25% NUNN ROCKPRTP AULT TERRY_RANCH % 84.41% CHEYENNE HAPPYJCK WARRENLM NTHRNGE % 83.84% BASE CASE CONTINGENCY Appendix B: Simulated Contingencies EVENTS BASE CASE KEOTA STORY OPEN BRANCH FROM BUS [KEOTA ] TO BUS [STORY ] CKT 1 Loading % February 12,

37 CONTINGENCY EVENTS CARR DRA BARBERCK OPEN BRANCH FROM BUS [CARR DRA ] TO BUS [BARBERCK ] CKT 1 CASPERPP CASPERLM OPEN BRANCH FROM BUS [CASPERPP ] TO BUS [CASPERLM ] CKT 1 CASPERPP REFNRYTP OPEN BRANCH FROM BUS [CASPERPP ] TO BUS [REFNRYTP ] CKT 1 DAVEJOHN LAR.RIVR OPEN BRANCH FROM BUS [DAVEJOHN ] TO BUS [LAR.RIVR ] CKT 1 DAVEJOHN DAVEJTPN OPEN BRANCH FROM BUS [DAVEJOHN ] TO BUS [DAVEJTPN ] CKT 1 DAVEJOHN BIXBY OPEN BRANCH FROM BUS [DAVEJOHN ] TO BUS [BIXBY ] CKT 1 BIXBY DAVEJTPS OPEN BRANCH FROM BUS [BIXBY ] TO BUS [DAVEJTPS ] CKT 1 WINDSTAR PUMPKIN OPEN BRANCH FROM BUS [WINDSTAR ] TO BUS [PUMPKIN_BTS ] CKT 1 KELIM AIRPORT OPEN BRANCH FROM BUS [KELIM ] TO BUS [AIRPORT ] CKT 1 ST.VRAIN LONGPEAK OPEN BRANCH FROM BUS [ST.VRAIN ] TO BUS [LONGPEAK ] CKT 1 ST.VRAIN FORDHAM OPEN BRANCH FROM BUS [ST.VRAIN ] TO BUS [FORDHAM ] CKT 1 WELD_PS WELD LM OPEN BRANCH FROM BUS [WELD_PS ] TO BUS [WELD LM ] CKT 1 WELD_PS WELD LM OPEN BRANCH FROM BUS [WELD_PS ] TO BUS [WELD LM ] CKT 1 WINDSOR AULT OPEN BRANCH FROM BUS [WINDSOR ] TO BUS [AULT ] CKT 1 BERTHOUD LONETREE OPEN BRANCH FROM BUS [BERTHOUD ] TO BUS [LONETREE ] CKT 1 BERTHOUD LONTRETP OPEN BRANCH FROM BUS [BERTHOUD ] TO BUS [LONTRETP ] CKT 1 SLATERTS DEL CTAP OPEN BRANCH FROM BUS [SLATERTS ] TO BUS [DEL CTAP ] CKT 1 SLATERTS DELCAMIN OPEN BRANCH FROM BUS [SLATERTS ] TO BUS [DELCAMIN ] CKT 1 AIRPORT BOYD OPEN BRANCH FROM BUS [AIRPORT ] TO BUS [BOYD ] CKT 1 AIRPORT WINDSORT OPEN BRANCH FROM BUS [AIRPORT ] TO BUS [WINDSORT ] CKT 1 ALCOVA CASPERLM OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [CASPERLM ] CKT 1 ALCOVA CASPERLM #2 OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [CASPERLM ] CKT 2 ALCOVA FREMONT OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [FREMONT ] CKT 1 ALCOVA MIRACLEM OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [MIRACLEM ] CKT 1 ALCOVA MIRACLEM #2 OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [MIRACLEM ] CKT 2 ALCOVA RADERVIL OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [RADERVIL ] CKT 1 ARCHER CHEYENNE OPEN BRANCH FROM BUS [ARCHER ] TO BUS [CHEYENNE ] CKT 1 ARCHER CROWCRK OPEN BRANCH FROM BUS [ARCHER ] TO BUS [CROWCRK ] CKT 1 ARCHER MYERS TP OPEN BRANCH FROM BUS [ARCHER ] TO BUS [MYERS TP ] CKT 1 ARCHER PINEBLUF OPEN BRANCH FROM BUS [ARCHER ] TO BUS [PINEBLUF ] CKT 1 ARCHER CPGSTN OPEN BRANCH FROM BUS [ARCHER ] TO BUS [CPGSTN ] CKT 1 CPGSTN EB PARK OPEN BRANCH FROM BUS [CPGSTN ] TO BUS [EB PARK ] CKT 1 ARCHER AULT OPEN BRANCH FROM BUS [ARCHER ] TO BUS [AULT ] CKT 1 ARCHER STEGALL OPEN BRANCH FROM BUS [ARCHER ] TO BUS [STEGALL ] CKT 1 ARCHER TERRY_RANCH OPEN BRANCH FROM BUS [ARCHER ] TO BUS [TERRY_RANCH ] CKT 1 ARCHER WAYNECHILD OPEN BRANCH FROM BUS [ARCHER ] TO BUS [WL_CHILD ] CKT 1 February 12,

38 CONTINGENCY EVENTS TERRY_RANCH NORTH PARK OPEN BRANCH FROM BUS [TERRY_RANCH ] TO BUS [NORTH PARK ] CKT 1 AULT RAWHIDE OPEN BRANCH FROM BUS [AULT ] TO BUS [RAWHIDE ] CKT 1 RAWHIDE TIMBERLN OPEN BRANCH FROM BUS [RAWHIDE ] TO BUS [TIMBERLN ] CKT 1 AULT WELD LM OPEN BRANCH FROM BUS [AULT ] TO BUS [WELD LM ] CKT 1 AULT WELD LM #2 OPEN BRANCH FROM BUS [AULT ] TO BUS [WELD LM ] CKT 2 AULT TERRY_RANCH OPEN BRANCH FROM BUS [AULT ] TO BUS [TERRY_RANCH ] CKT 1 AULT LAR.RIVR OPEN BRANCH FROM BUS [AULT ] TO BUS [LAR.RIVR ] CKT 1 AULT CRAIG OPEN BRANCH FROM BUS [AULT ] TO BUS [CRAIG ] CKT 1 BLKHLWTP COBBLKTP OPEN BRANCH FROM BUS [BLKHLWTP ] TO BUS [COBBLKTP ] CKT 1 BLKHLWTP AULT OPEN BRANCH FROM BUS [BLKHLWTP ] TO BUS [AULT ] CKT 1 BOYD LOVE E OPEN BRANCH FROM BUS [BOYD ] TO BUS [LOVE E ] CKT 1 BOYD VALLEYLM OPEN BRANCH FROM BUS [BOYD ] TO BUS [VALLEYLM ] CKT 1 BOYD LONTRETP OPEN BRANCH FROM BUS [BOYD ] TO BUS [LONTRETP ] CKT 1 BOYD DERBHILT OPEN BRANCH FROM BUS [BOYD ] TO BUS [DERBHILT ] CKT 1 BOYD LONGPEAK OPEN BRANCH FROM BUS [BOYD ] TO BUS [LONGPEAK ] CKT 1 BOYD PORTNER OPEN BRANCH FROM BUS [BOYD ] TO BUS [PORTNER ] CKT 1 BRIGHTNW SANDCRK OPEN BRANCH FROM BUS [BRIGHTNW ] TO BUS [SANDCRK ] CKT 1 BRIGHTNW ERIE SW OPEN BRANCH FROM BUS [BRIGHTNW ] TO BUS [ERIE SW ] CKT 1 BUSHNLTP PINEBLUF OPEN BRANCH FROM BUS [BUSHNLTP ] TO BUS [PINEBLUF ] CKT 1 CARTERLK FLATIRON OPEN BRANCH FROM BUS [CARTERLK TAP115.00] TO BUS [FLATIRON ] CKT 1 CARTERLK LOVEWTAP OPEN BRANCH FROM BUS [CARTERLK TAP115.00] TO BUS [LOVEWTAP ] CKT 1 CASPERLM DAVEJTPN OPEN BRANCH FROM BUS [CASPERLM ] TO BUS [DAVEJTPN ] CKT 1 CHEYENNE HAPPYJCK OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [HAPPYJCK ] CKT 1 CHEYENNE CROWCRK OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [CROWCRK ] CKT 1 CHEYENNE PONNEQUI OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [PONNEQUI ] CKT 1 COBBLKTP TIMNATH OPEN BRANCH FROM BUS [COBBLKTP ] TO BUS [TIMNATH ] CKT 1 COBBLKTP COBBLAKE OPEN BRANCH FROM BUS [COBBLKTP ] TO BUS [COBBLAKE ] CKT 1 DEL CTAP LONGPEAK OPEN BRANCH FROM BUS [DEL CTAP ] TO BUS [LONGPEAK ] CKT 1 DEL CTAP MEADOW OPEN BRANCH FROM BUS [DEL CTAP ] TO BUS [MEADOW ] CKT 1 DELCAMIN RINNVALL OPEN BRANCH FROM BUS [DELCAMIN ] TO BUS [RINNVALL ] CKT 1 DERBYHIL DERBHILT OPEN BRANCH FROM BUS [DERBYHIL ] TO BUS [DERBHILT ] CKT 1 DIXON CK DRAKE RD OPEN BRANCH FROM BUS [DIXON CK ] TO BUS [DRAKE RD ] CKT 1 DIXON CK HRSTHTAP OPEN BRANCH FROM BUS [DIXON CK ] TO BUS [HRSTHTAP ] CKT 1 DIXON CK POUDRE OPEN BRANCH FROM BUS [DIXON CK ] TO BUS [POUDRE ] CKT 1 DRAKE RD TIMBERLN OPEN BRANCH FROM BUS [DRAKE RD ] TO BUS [TIMBERLN ] CKT 1 ESTES POLEHILL OPEN BRANCH FROM BUS [ESTES ] TO BUS [POLEHILL ] CKT 1 February 12,

39 CONTINGENCY EVENTS ESTES MARYLKSB OPEN BRANCH FROM BUS [ESTES ] TO BUS [MARYLKSB ] CKT 1 ESTES MARYLKTP OPEN BRANCH FROM BUS [ESTES ] TO BUS [MARYLKTP ] CKT 1 ESTES WAGONWHL OPEN BRANCH FROM BUS [ESTES ] TO BUS [WAGONWHL ] CKT 1 FLATIRON HRSTHTAP OPEN BRANCH FROM BUS [FLATIRON ] TO BUS [HRSTHTAP ] CKT 1 FLATIRON POLEHILL OPEN BRANCH FROM BUS [FLATIRON ] TO BUS [POLEHILL ] CKT 1 FORDHAM TERRY OPEN BRANCH FROM BUS [FORDHAM ] TO BUS [TERRY ] CKT 1 FORDHAM ROGERSRD OPEN BRANCH FROM BUS [FORDHAM ] TO BUS [ROGERSRD ] CKT 1 GEMCTYTP SPRINGCK OPEN BRANCH FROM BUS [GEMCTYTP ] TO BUS [SPRINGCK ] CKT 1 GEMCTYTP SNOWYRNG OPEN BRANCH FROM BUS [GEMCTYTP ] TO BUS [SNOWYRNG ] CKT 1 GLENDO GUERNTAP OPEN BRANCH FROM BUS [GLENDO ] TO BUS [GUERNTAP ] CKT 1 GLENDO PODOLAK OPEN BRANCH FROM BUS [GLENDO ] TO BUS [PODOLAK ] CKT 1 GLENDO WHTROCK OPEN BRANCH FROM BUS [GLENDO ] TO BUS [WHTROCK ] CKT 1 GLENDO WAGHN NT OPEN BRANCH FROM BUS [GLENDO ] TO BUS [WAGHN NT ] CKT 1 GLENDO WAGHN ST OPEN BRANCH FROM BUS [GLENDO ] TO BUS [WAGHN ST ] CKT 1 DAVEJTPN WAGHN NT OPEN BRANCH FROM BUS [DAVEJTPN ] TO BUS [WAGHN NT ] CKT 1 DAVEJTPS REFNRYTP OPEN BRANCH FROM BUS [DAVEJTPS ] TO BUS [REFNRYTP ] CKT 1 DAVEJTPS WAGHN ST OPEN BRANCH FROM BUS [DAVEJTPS ] TO BUS [WAGHN ST ] CKT 1 GUERNTAP LIMESTON OPEN BRANCH FROM BUS [GUERNTAP ] TO BUS [LIMESTON ] CKT 1 GUERNTAP GUERNRRL OPEN BRANCH FROM BUS [GUERNTAP ] TO BUS [GUERNRRL ] CKT 1 GUERNTAP WHTROCK OPEN BRANCH FROM BUS [GUERNTAP ] TO BUS [WHTROCK ] CKT 1 HAPPYJCK NORTH RANGE OPEN BRANCH FROM BUS [HAPPYJCK ] TO BUS [NORTHRNG ] CKT 1 HAPPYJCK HJWIND OPEN BRANCH FROM BUS [HAPPYJCK ] TO BUS [HJWIND ] CKT 1 HARMONY TIMBERLN OPEN BRANCH FROM BUS [HARMONY ] TO BUS [TIMBERLN ] CKT 1 HARMONY PORTNER OPEN BRANCH FROM BUS [HARMONY ] TO BUS [PORTNER ] CKT 1 HARVARD LNGMNTNW OPEN BRANCH FROM BUS [HARVARD ] TO BUS [LNGMNTNW ] CKT 1 HORSESHO LOVE W OPEN BRANCH FROM BUS [HORSESHO ] TO BUS [LOVE W ] CKT 1 HORSESHO CROSSRDS OPEN BRANCH FROM BUS [HORSESHO ] TO BUS [CROSSRDS ] CKT 1 HRSTHTAP TRILBY OPEN BRANCH FROM BUS [HRSTHTAP ] TO BUS [TRILBY ] CKT 1 HRSTHTAP MASONVIL OPEN BRANCH FROM BUS [HRSTHTAP ] TO BUS [MASONVIL ] CKT 1 HYGIENE LNGMNTNW OPEN BRANCH FROM BUS [HYGIENE ] TO BUS [LNGMNTNW ] CKT 1 HYGIENE LYONS OPEN BRANCH FROM BUS [HYGIENE ] TO BUS [LYONS ] CKT 1 KODAK WHITNEY OPEN BRANCH FROM BUS [KODAK ] TO BUS [WHITNEY ] CKT 1 KODAK WHITNEY #2 OPEN BRANCH FROM BUS [KODAK ] TO BUS [WHITNEY ] CKT 2 KORTES KORTESTP OPEN BRANCH FROM BUS [KORTES ] TO BUS [KORTESTP ] CKT 1 KORTES MIRACLEM OPEN BRANCH FROM BUS [KORTES ] TO BUS [MIRACLEM ] CKT 1 KORTESTP MIRACLEM OPEN BRANCH FROM BUS [KORTESTP ] TO BUS [MIRACLEM ] CKT 1 February 12,

40 CONTINGENCY EVENTS KORTESTP SEMINOE OPEN BRANCH FROM BUS [KORTESTP ] TO BUS [SEMINOE ] CKT 1 LAGRANGE ROUNDTOP OPEN BRANCH FROM BUS [LAGRANGE ] TO BUS [ROUNDTOP ] CKT 1 LAGRANGE STEGALL OPEN BRANCH FROM BUS [LAGRANGE ] TO BUS [STEGALL ] CKT 1 LAPORTE BELLVUTP OPEN BRANCH FROM BUS [LAPORTE ] TO BUS [BELLVUTP ] CKT 1 LAPORTE RAWHIDE OPEN BRANCH FROM BUS [LAPORTE ] TO BUS [RAWHIDE ] CKT 1 LAPORTE RAWHIDE #2 OPEN BRANCH FROM BUS [LAPORTE ] TO BUS [RAWHIDE ] CKT 2 LAPORTE TIMBERLN OPEN BRANCH FROM BUS [LAPORTE ] TO BUS [TIMBERLN ] CKT 1 LAPORTE COLLEGLK OPEN BRANCH FROM BUS [LAPORTE ] TO BUS [COLLEGLK ] CKT 1 LAR.RIVR STEGALL OPEN BRANCH FROM BUS [LAR.RIVR ] TO BUS [STEGALL ] CKT 1 LARAMIE OASISTAP OPEN BRANCH FROM BUS [LARAMIE ] TO BUS [OASISTAP ] CKT 1 LARAMIE SNOWYRNG OPEN BRANCH FROM BUS [LARAMIE ] TO BUS [SNOWYRNG ] CKT 1 LINDEN RICHARDS OPEN BRANCH FROM BUS [LINDEN ] TO BUS [RICHARDS ] CKT 1 LINDEN TIMBERLN OPEN BRANCH FROM BUS [LINDEN ] TO BUS [TIMBERLN ] CKT 1 LINGLE LINGLETP OPEN BRANCH FROM BUS [LINGLE ] TO BUS [LINGLETP ] CKT 1 LNGMNTNW MEADOW OPEN BRANCH FROM BUS [LNGMNTNW ] TO BUS [MEADOW ] CKT 1 LNGMNTNW GLDNPNDS OPEN BRANCH FROM BUS [LNGMNTNW ] TO BUS [GLDNPNDS ] CKT 1 LONGPEAK CNTYLINE OPEN BRANCH FROM BUS [LONGPEAK ] TO BUS [CNTYLINE ] CKT 1 LOVE E CROSSRDS OPEN BRANCH FROM BUS [LOVE E ] TO BUS [CROSSRDS ] CKT 1 LOVE W LOVEWTAP OPEN BRANCH FROM BUS [LOVE W ] TO BUS [LOVEWTAP ] CKT 1 LOVEWTAP VALLEYLM OPEN BRANCH FROM BUS [LOVEWTAP ] TO BUS [VALLEYLM ] CKT 1 LYMAN LYMANTP OPEN BRANCH FROM BUS [LYMAN ] TO BUS [LYMANTP ] CKT 1 LYONS DOWE FLATS OPEN BRANCH FROM BUS [LYONS ] TO BUS [DOWEFLAT ] CKT 1 DOWE FLATS ROCKMTCM OPEN BRANCH FROM BUS [DOWEFLAT ] TO BUS [ROCKMTCM ] CKT 1 LYONS WAGONWHL OPEN BRANCH FROM BUS [LYONS ] TO BUS [WAGONWHL ] CKT 1 MAY OASISTAP OPEN BRANCH FROM BUS [MAY ] TO BUS [OASISTAP ] CKT 1 MCKENZIE MARYLKSB OPEN BRANCH FROM BUS [MCKENZIE ] TO BUS [MARYLKSB ] CKT 1 MED BOW MEDBOWTP OPEN BRANCH FROM BUS [MED BOW ] TO BUS [MEDBOWTP ] CKT 1 MIRACLEM SEMINOTP OPEN BRANCH FROM BUS [MIRACLEM ] TO BUS [SEMINOTP ] CKT 1 MIRACLEM MEDBOWTP OPEN BRANCH FROM BUS [MIRACLEM ] TO BUS [MEDBOWTP ] CKT 1 MYERS MYERS TP OPEN BRANCH FROM BUS [MYERS ] TO BUS [MYERS TP ] CKT 1 MYERS TP POLE CK OPEN BRANCH FROM BUS [MYERS TP ] TO BUS [POLE CK ] CKT 1 NUNN ROCKPRTP OPEN BRANCH FROM BUS [NUNN ] TO BUS [ROCKPRTP ] CKT 1 NUNN AULT OPEN BRANCH FROM BUS [NUNN ] TO BUS [AULT ] CKT 1 OASISTAP MEDBOWTP OPEN BRANCH FROM BUS [OASISTAP ] TO BUS [MEDBOWTP ] CKT 1 POLE CK QUALLS OPEN BRANCH FROM BUS [POLE CK ] TO BUS [QUALLS ] CKT 1 POLE CK ROUNDTOP OPEN BRANCH FROM BUS [POLE CK ] TO BUS [ROUNDTOP ] CKT 1 February 12,

41 CONTINGENCY EVENTS POUDRE RICHRDTP OPEN BRANCH FROM BUS [POUDRE ] TO BUS [RICHRDTP ] CKT 1 RICHARDS WAVER PV OPEN BRANCH FROM BUS [RICHARDS ] TO BUS [WAVER PV ] CKT 1 ROCKPRTP OWL_CRK OPEN BRANCH FROM BUS [ROCKPRTP ] TO BUS [OWL_CRK ] CKT 1 ROUNDTOP SENTINEL OPEN BRANCH FROM BUS [ROUNDTOP ] TO BUS [SENTINEL ] CKT 1 SEMINOE SEMINOTP OPEN BRANCH FROM BUS [SEMINOE ] TO BUS [SEMINOTP ] CKT 1 SPRINGCK FTSANDER OPEN BRANCH FROM BUS [SPRINGCK ] TO BUS [FTSANDER ] CKT 1 STEGALL LINGLETP OPEN BRANCH FROM BUS [STEGALL ] TO BUS [LINGLETP ] CKT 1 STEGALL LYMANTP OPEN BRANCH FROM BUS [STEGALL ] TO BUS [LYMANTP ] CKT 1 TERRY CNTYLINE OPEN BRANCH FROM BUS [TERRY ] TO BUS [CNTYLINE ] CKT 1 TERRY ERIE SW OPEN BRANCH FROM BUS [TERRY ] TO BUS [ERIE SW ] CKT 1 TERRY GLDNPNDS OPEN BRANCH FROM BUS [TERRY ] TO BUS [GLDNPNDS ] CKT 1 TIMNATH RICHRDTP OPEN BRANCH FROM BUS [TIMNATH ] TO BUS [RICHRDTP ] CKT 1 TIMNATH BOXELDER OPEN BRANCH FROM BUS [TIMNATH ] TO BUS [BOXELDER ] CKT 1 WELD LM BOOMERNG OPEN BRANCH FROM BUS [WELD LM ] TO BUS [BOOMERNG ] CKT 1 WELD LM WHITNEY OPEN BRANCH FROM BUS [WELD LM ] TO BUS [WHITNEY ] CKT 1 WINDSOR WINDSORT OPEN BRANCH FROM BUS [WINDSOR ] TO BUS [WINDSORT ] CKT 1 MARYLKPP MARYLKTP OPEN BRANCH FROM BUS [MARYLKPP ] TO BUS [MARYLKTP ] CKT 1 MARYLKSB MARYLKTP OPEN BRANCH FROM BUS [MARYLKSB ] TO BUS [MARYLKTP ] CKT 1 LINGLETP WHTROCK OPEN BRANCH FROM BUS [LINGLETP ] TO BUS [WHTROCK ] CKT 1 LYMANTP WHTROCK OPEN BRANCH FROM BUS [LYMANTP ] TO BUS [WHTROCK ] CKT 1 TEKLA PUMPKIN OPEN BRANCH FROM BUS [TEKLA ] TO BUS [PUMPKIN_BTS ] CKT 1 BELLEVUE BELLVUTP OPEN BRANCH FROM BUS [BELLEVUE ] TO BUS [BELLVUTP ] CKT 1 BELLVUTP RIPPLE OPEN BRANCH FROM BUS [BELLVUTP ] TO BUS [RIPPLE ] CKT 1 JACKLOPE WARMSPGS OPEN BRANCH FROM BUS [JACKLOPE ] TO BUS [WARMSPGS ] CKT 1 MEDBOWHS MEDBOWTP OPEN BRANCH FROM BUS [MEDBOWHS ] TO BUS [MEDBOWTP ] CKT 1 WARMSPGS EMI TAP OPEN BRANCH FROM BUS [WARMSPGS ] TO BUS [EMI TAP ] CKT 1 WAGNHNDS WAGHN NT OPEN BRANCH FROM BUS [WAGNHNDS ] TO BUS [WAGHN NT ] CKT 1 WAGNHNDS EMI TAP OPEN BRANCH FROM BUS [WAGNHNDS ] TO BUS [EMI TAP ] CKT 1 VALLEYLM DERBHILT OPEN BRANCH FROM BUS [VALLEYLM ] TO BUS [DERBHILT ] CKT 1 WARRENLM NTHRNGE OPEN BRANCH FROM BUS [WARRENLM ] TO BUS [NORTHRNG ] CKT 1 WINDSORT WHITNEY OPEN BRANCH FROM BUS [WINDSORT ] TO BUS [WHITNEY ] CKT 1 ROGERSRD GLDNPNDS OPEN BRANCH FROM BUS [ROGERSRD ] TO BUS [GLDNPNDS ] CKT 1 DIXON CK COLLEGLK OPEN BRANCH FROM BUS [DIXON CK ] TO BUS [COLLEGLK ] CKT 1 DIXON CK HORSESHO OPEN BRANCH FROM BUS [DIXON CK ] TO BUS [HORSESHO ] CKT 1 RINNVALL DACONO OPEN BRANCH FROM BUS [RINNVALL ] TO BUS [DACONO ] CKT 1 DACONO ERIE SW OPEN BRANCH FROM BUS [DACONO ] TO BUS [ERIE SW ] CKT 1 February 12,

42 CONTINGENCY EVENTS PONNEQUI OWL_CRK OPEN BRANCH FROM BUS [PONNEQUI ] TO BUS [OWL_CRK ] CKT 1 CHEYENNE SNOWYRNG OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [SNOWYRNG ] CKT 1 CHEYENNE TERRY_RANCH OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [TERRY_RANCH ] CKT 1 BRACEWLL WHITNEY OPEN BRANCH FROM BUS [BRACEWLL ] TO BUS [WHITNEY ] CKT 1 BRACEWLL WHITNEY #2 OPEN BRANCH FROM BUS [BRACEWLL ] TO BUS [WHITNEY ] CKT 2 SNOWYRNG MIRACLEM OPEN BRANCH FROM BUS [SNOWYRNG ] TO BUS [MIRACLEM ] CKT 1 WHEATLND LAR.RIVR OPEN BRANCH FROM BUS [WHEATLND ] TO BUS [LAR.RIVR ] CKT 1 EMIGRNT EMI TAP OPEN BRANCH FROM BUS [EMIGRNT ] TO BUS [EMI TAP ] CKT 1 CHEY_S SWANRNCH OPEN BRANCH FROM BUS [CHEY_S ] TO BUS [SWANRNCH ] CKT 1 LGIR-G CHEY_W OPEN BRANCH FROM BUS [G7WNDHI ] TO BUS [W.CHEY ] CKT 1 LGIR-G CHEY_W OPEN BRANCH FROM BUS [CL-G8_G9_POI115.00] TO BUS [W.CHEY ] CKT 1 PUMPKIN BARBERCK OPEN BRANCH FROM BUS [PUMPKIN_BTS ] TO BUS [BARBERCK ] CKT 1 CHEY_S CORLETT OPEN BRANCH FROM BUS [CHEY_S ] TO BUS [CORLETT ] CKT 1 NTHRNGE CORLETT OPEN BRANCH FROM BUS [NORTHRNG ] TO BUS [CORLETT ] CKT 1 TRR-AULT+ARH-AULT DBLCKT OPEN BRANCH FROM BUS [ARCHER ] TO BUS [AULT ] CKT 1 RAWHIDE RAWHIDE #U1 OPEN BRANCH FROM BUS [RAWHIDE ] TO BUS [RAWHIDE ] CKT U1 RAWHIDEA RAWHIDE #UA OPEN BRANCH FROM BUS [RAWHIDEA ] TO BUS [RAWHIDE ] CKT UA RAWHIDEF RAWHIDE #UF OPEN BRANCH FROM BUS [RAWHIDEF ] TO BUS [RAWHIDE ] CKT UF RAWHIDED RAWHIDE #UD OPEN BRANCH FROM BUS [RAWHIDED ] TO BUS [RAWHIDE ] CKT UD RAWHIDEB RAWHIDE #UB OPEN BRANCH FROM BUS [RAWHIDEB ] TO BUS [RAWHIDE ] CKT UB RAWHIDEC RAWHIDE #UC OPEN BRANCH FROM BUS [RAWHIDEC ] TO BUS [RAWHIDE ] CKT UC ALCOVA ALCOVA OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [ALCOVA ] CKT 1 ALCOVA ALCOVA OPEN BRANCH FROM BUS [ALCOVA ] TO BUS [ALCOVA ] CKT 1 AULT AULT OPEN BRANCH FROM BUS [AULT ] TO BUS [AULT ] CKT 1 AULT AULT #2 OPEN BRANCH FROM BUS [AULT ] TO BUS [AULT ] CKT 2 AULT AULT #3 OPEN BRANCH FROM BUS [AULT ] TO BUS [AULT ] CKT 3 BOYD BOYD OPEN BRANCH FROM BUS [BOYD ] TO BUS [BOYD ] CKT 1 BOYD BOYD #2 OPEN BRANCH FROM BUS [BOYD ] TO BUS [BOYD ] CKT 2 DIXON CK DIXON CK OPEN BRANCH FROM BUS [DIXON CK ] TO BUS [DIXON CK ] CKT 1 DIXON CK DIXON CK #2 OPEN BRANCH FROM BUS [DIXON CK ] TO BUS [DIXON CK ] CKT 2 ESTES ESTES OPEN BRANCH FROM BUS [ESTES ] TO BUS [ESTES ] CKT 1 ESTES ESTES OPEN BRANCH FROM BUS [ESTES ] TO BUS [ESTES ] CKT 1 ESTES ESTES OPEN BRANCH FROM BUS [ESTES ] TO BUS [ESTES ] CKT 1 FLATIRON FLATIRN OPEN BRANCH FROM BUS [FLATIRON ] TO BUS [FLATIRN ] CKT 1 FLATIRON FLATIRN OPEN BRANCH FROM BUS [FLATIRON ] TO BUS [FLATIRN ] CKT 1 FORDHAM FORDHAM OPEN BRANCH FROM BUS [FORDHAM ] TO BUS [FORDHAM ] CKT 1 February 12,

43 CONTINGENCY EVENTS FORDHAM FORDHAM #2 OPEN BRANCH FROM BUS [FORDHAM ] TO BUS [FORDHAM ] CKT 2 FREMONT FREMONT OPEN BRANCH FROM BUS [FREMONT ] TO BUS [FREMONT ] CKT 1 FREMONT FREMONT OPEN BRANCH FROM BUS [FREMONT ] TO BUS [FREMONT ] CKT 1 GLENDO GLENDO OPEN BRANCH FROM BUS [GLENDO ] TO BUS [GLENDO ] CKT 1 GLENDO GLENDO OPEN BRANCH FROM BUS [GLENDO ] TO BUS [GLENDO ] CKT 1 HORSESHO HORSESHO OPEN BRANCH FROM BUS [HORSESHO ] TO BUS [HORSESHO ] CKT 1 HORSESHO HORSESHO #2 OPEN BRANCH FROM BUS [HORSESHO ] TO BUS [HORSESHO ] CKT 2 KORTES KORTES OPEN BRANCH FROM BUS [KORTES ] TO BUS [KORTES ] CKT 1 KORTES KORTES OPEN BRANCH FROM BUS [KORTES ] TO BUS [KORTES ] CKT 1 KORTES KORTES OPEN BRANCH FROM BUS [KORTES ] TO BUS [KORTES ] CKT 1 LAR.RIVR LAR.RIVR OPEN BRANCH FROM BUS [LAR.RIVR ] TO BUS [LAR.RIVR ] CKT 1 LAR.RIVR LAR.RIVR #2 OPEN BRANCH FROM BUS [LAR.RIVR ] TO BUS [LAR.RIVR ] CKT 2 LAR.RIVR LAR.RIVR OPEN BRANCH FROM BUS [LAR.RIVR ] TO BUS [LAR.RIVR ] CKT 1 LAR.RIVR MBPP OPEN BRANCH FROM BUS [LAR.RIVR ] TO BUS [MBPP ] CKT 1 LAR.RIVR MBPP OPEN BRANCH FROM BUS [LAR.RIVR ] TO BUS [MBPP ] CKT 1 LONGPEAK LONGPEAK OPEN BRANCH FROM BUS [LONGPEAK ] TO BUS [LONGPEAK ] CKT 1 LONGPEAK LONGPEAK #2 OPEN BRANCH FROM BUS [LONGPEAK ] TO BUS [LONGPEAK ] CKT 2 POLEHILL POLEHILL OPEN BRANCH FROM BUS [POLEHILL ] TO BUS [POLEHILL ] CKT 1 SEMINOE SMNOE OPEN BRANCH FROM BUS [SEMINOE ] TO BUS [SEMINOE ] CKT 1 SEMINOE SEMINOE OPEN BRANCH FROM BUS [SEMINOE ] TO BUS [SEMINOE ] CKT 1 TIMBERLN TIMBERLN #3 OPEN BRANCH FROM BUS [TIMBERLN ] TO BUS [TIMBERLN ] CKT 3 TIMBERLN TIMBERLN #4 OPEN BRANCH FROM BUS [TIMBERLN ] TO BUS [TIMBERLN ] CKT 4 WELD LM WELD LM OPEN BRANCH FROM BUS [WELD LM ] TO BUS [WELD LM ] CKT 1 MARYLKPP MARYLKPP OPEN BRANCH FROM BUS [MARYLKPP ] TO BUS [MARYLKPP ] CKT 1 MARYLKSB MARYLKSB OPEN BRANCH FROM BUS [MARYLKSB ] TO BUS [MARYLKSB ] CKT 1 LIMESTON LIMESTON OPEN BRANCH FROM BUS [LIMESTON ] TO BUS [LIMESTON ] CKT 1 WHTROCK WHTROCK OPEN BRANCH FROM BUS [WHTROCK ] TO BUS [WHTROCK ] CKT 1 CHEY_S TERRY_RANCH OPEN BRANCH FROM BUS [CHEY_S ] TO BUS [TERRY_RANCH ] CKT G HJWIND OPEN BRANCH FROM BUS [2004-G ] TO BUS [HJWIND ] CKT 1 SSWIND HJWIND OPEN BRANCH FROM BUS [SSWIND ] TO BUS [HJWIND ] CKT 1 ARCHER ARCHER ARH 13.8A OPEN BRANCH FROM BUS [ARCHER ] TO BUS [ARCHER ] TO BUS [ARH 13.8A ] CKT 1 ARCHER ARCHER ARH_LVB OPEN BRANCH FROM BUS [ARCHER ] TO BUS [ARCHER ] TO BUS [ARH 13.8B # ] CKT 2 AULT AULT OPEN BRANCH FROM BUS [AULT ] TO BUS [AULT ] TO BUS [AULT ] CKT 1 SNOWYRNG SNOWYRNG OPEN BRANCH FROM BUS [SNOWYRNG ] TO BUS [SNOWYRNG ] TO BUS [SNG_LV SNG_LV A A ] CKT 1 February 12,

44 CONTINGENCY EVENTS SNOWYRNG SNOWYRNG OPEN BRANCH FROM BUS [SNOWYRNG ] TO BUS [SNOWYRNG ] TO BUS [SNG_LV SNG_LV B #2 B ] CKT 2 MIRACLEM MIRACLEM MM_LV OPEN BRANCH FROM BUS [MIRACLEM ] TO BUS [MIRACLEM ] TO BUS [MM_LV A A ] CKT 1 MIRACLEM MIRACLEM MM_LV OPEN BRANCH FROM BUS [MIRACLEM ] TO BUS [MIRACLEM ] TO BUS [MM_LV B B # ] CKT 2 CHEYENNE CHEYENNE CH OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [CHEYENNE ] TO BUS [CH 13.8A 13.8A ] CKT 1 CHEYENNE CHEYENNE CH OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [CHEYENNE ] TO BUS [CH 13.8B 13.8B # ] CKT 2 MBPP REMOVE UNIT 1 FROM BUS [MBPP ] MBPP REMOVE UNIT 1 FROM BUS [MBPP ] POLEHILL REMOVE UNIT 1 FROM BUS [POLEHILL ] ALCOVA REMOVE UNIT 1 FROM BUS [ALCOVA ] FREMONT REMOVE UNIT 1 FROM BUS [FREMONT ] FREMONT REMOVE UNIT 1 FROM BUS [FREMONT ] GLENDO REMOVE UNIT 1 FROM BUS [GLENDO ] GLENDO REMOVE UNIT 1 FROM BUS [GLENDO ] GUERNSY REMOVE UNIT 1 FROM BUS [GUERNSY ] KORTES REMOVE UNIT 1 FROM BUS [KORTES ] KORTES REMOVE UNIT 1 FROM BUS [KORTES ] KORTES REMOVE UNIT 1 FROM BUS [KORTES ] SMNOE REMOVE UNIT 1 FROM BUS [SEMINOE ] SMNOE REMOVE UNIT 2 FROM BUS [SEMINOE ] ALCOVA REMOVE UNIT 1 FROM BUS [ALCOVA ] SEMINOE REMOVE UNIT 1 FROM BUS [SEMINOE ] GUERNSY REMOVE UNIT 2 FROM BUS [GUERNSY ] FLATIRN REMOVE UNIT 2 FROM BUS [FLATIRN ] FLATIRN REMOVE UNIT 1 FROM BUS [FLATIRN ] FLATIRN REMOVE UNIT 3 FROM BUS [FLATIRN ] CLR_ REMOVE UNIT 1 FROM BUS [CLR_ ] SS_GEN REMOVE UNIT 1 FROM BUS [SS_GEN ] G7_GEN G1 REMOVE UNIT G1 FROM BUS [G7WNDLO ] G8_GEN G1 REMOVE UNIT W FROM BUS [CLPT-G9_GEN ] CHEY-TR+CHEY-OWL DBLCKT OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [TERRY_RANCH ] CKT 1 OPEN LINE FROM BUS [PONNEQUI ] TO BUS [OWL_CRK ] CKT 1 OPEN LINE FROM BUS [PONNEQUI ] TO BUS [CHEYENNE ] CKT 1 CH-HJ+CH-SNOWY DBLCKT OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [TERRY_RANCH ] CKT 1 February 12,

45 CONTINGENCY EVENTS OPEN BRANCH FROM BUS [CHEYENNE ] TO BUS [SNOWYRNG ] CKT 1 SCHEY-LGIRG7 115 DBLCKT OPEN LINE FROM BUS [CORLETT ] TO BUS [CHEY_S ] CKT 1 OPEN LINE FROM BUS [CORLETT ] TO BUS [NORTHRNG ] CKT 1 OPEN LINE FROM BUS [SWANRNCH ] TO BUS [W.CHEY ] CKT 1 OPEN LINE FROM BUS [SWANRNCH ] TO BUS [CHEY_S ] CKT 1 ARCH-CHEY N&S 115 OPEN BRANCH FROM BUS [ARCHER ] TO BUS [CHEYENNE ] CKT 1 OPEN LINE FROM BUS [CROWCRK ] TO BUS [ARCHER ] CKT 1 OPEN LINE FROM BUS [CROWCRK ] TO BUS [CHEYENNE ] CKT 1 LGIR-G7 OPEN LINE FROM BUS [G7WNDLO ] TO BUS [G7WNDMI ] CKT WD OPEN LINE FROM BUS [G7WNDMI ] TO BUS [G7WNDMID ] CKT 1 LGIR-G8 OPEN LINE FROM BUS [G7WNDMID ] TO BUS [G7WNDHI ] CKT WD OPEN LINE FROM BUS [G7WNDHI ] TO BUS [W.CHEY ] CKT 1 OPEN LINE FROM BUS [CL-G8_G9_POI115.00] TO BUS [CLPT-G9_SOL ] CKT WD OPEN LINE FROM BUS [CL-G8_G9_POI115.00] TO BUS [CLPT-G9_SOL ] CKT WD OPEN LINE FROM BUS [CL-G8_G9_POI115.00] TO BUS [W.CHEY ] CKT 1 OPEN LINE FROM BUS [CLPT-G9_SOL ] TO BUS [CLPT-G9_CYS ] CKT 1 OPEN LINE FROM BUS [CLPT-G9_CYS ] TO BUS [CLPT-G9_GEN ] CKT WD CPGSTN_1 OPEN LINE FROM BUS [CPGSTN_ ] TO BUS [CPGSTN ] CKT U1 CPGSTN_2 OPEN LINE FROM BUS [CPGSTN_ ] TO BUS [CPGSTN ] CKT U1 February 12,

46 Appendix C: Transient Stability Results Transient Stability plots provided as a separate document. 2020HS Stressed 2020LS Stressed Disturbance Description Without CLPT-G10 With CLPT- G10 Without CLPT-G10 With CLPT- G10 System Intact Stable Stable Stable Stable Archer-Cheyenne 115 Stable Stable Stable Stable CPGS-Archer 115 Stable Stable Stable Stable CPGS-Archer 115 1&2 Stable Stable Stable Stable CPGS-East Business Park 115 Stable Stable Stable Stable Happy Jack-Cheyenne 115 Stable Stable Stable Stable Happy Jack-Happy Jack Wind 115 Stable Stable Stable Stable Happy Jack-North Range 115 Stable Stable Stable Stable HJK-NRG 115 PO + SCH 230/115 XFMR Stable Stable Stable Stable South Cheyenne-Swan Ranch 115 Stable Stable Stable Stable SCH-COR 115 PO + SCH-SWR 115 Stable Stable Stable Stable South Cheyenne-Corlett-North Range 115 Stable Stable Stable Stable Archer-Ault 230 Stable Stable Stable Stable Archer-Terry Ranch 230 Stable Stable Stable Stable ACH-TR 230 PO + ARH 230/115 XFMR Stable Stable Stable Stable ACH-TR 230 PO + ARH-CHY 115 Line Stable Stable Stable Stable ACH-TR 230 PO + ARH-CPGS 115 Line Stable Stable Stable Stable Archer-Stegall 230 Stable Stable Stable Stable Cheyenne-Terry Ranch 230 Stable Stable Stable Stable Cheyenne-Snowy Range 230 Stable Stable Stable Stable Snowy Range-Miracle Mile 230 Stable Stable Stable Stable Terry Ranch-Ault 230 Stable Stable Stable Stable Terry Ranch-North Park 230 Stable Stable Stable Stable Laramie River Station-Ault 345 Stable Stable Stable Stable Archer-Wayne Child 230 Stable Stable Stable Stable LRS-Keota 345 (No WC PH2) Stable Stable Stable Stable Cheyenne 230/115 XFMR (delayed clearing) Stable Stable Stable Stable Archer 230/115 XFMR (delayed clearing) Stable Stable Stable Stable February 12,

47 Appendix D: Reference Guide for Plots The list of channels below identify the parameters that were analyzed, and thus can be found in the transient stability plots (provided separately). The order matches the order of the plots from top to bottom, left to right. This list of channels consists of a subset of the total channels included in the snapshot; the full list of channels is available per request. Left Side (Top to Bottom) Right Side (Top to Bottom) Channel # Channel Name Channel # Channel Name VOLTAGES2 VOLTAGES PONNEQUI 115. VOLT 735 AULT 230. VOLT 1150 OWL_CRK 115. VOLT 724 WL_CHILD 230. VOLT 1088 CROWCRK 115. VOLT 1093 TERRY_RANCH 230. VOLT 1202 CPGSTN 115. VOLT 1142 SNOWYRNG 230. VOLT 1201 KINGRANCH 115. VOLT 1125 CHEYENNE 230. VOLT 733 ARCHER 230. VOLT VOLTAGES1 VOLTAGES CORLETT 115. VOLT 901 STORY 345 VOLT 1197 HJWIND 115. VOLT 736 AULT 345 VOLT 1196 EB PARK 115. VOLT 680 KEOTA 345. VOLT 1195 SWANRNCH 115. VOLT 825 LRS 345 VOLT 1194 NORTHRNG 115. VOLT 1192 CHEY_S 115. VOLT VOLTAGES6 ANGLES WYGEN VOLT 19 DAVEJON1 ANGLE 1438 WYGEN VOLT 18 DAVEJON2 ANGLE 1437 WYGEN 13.8 VOLT 17 DAVEJON4 ANGLE 1435 CPGSTN_ VOLT 4 PAWNEE ANGLE 1434 CPGSTN_ VOLT 2 MANCHEF1 ANGLE 1 MANCHEF2 ANGLE VOLTAGES5 VOLTAGES7 785 GEM CITY 115 VOLT 1440 CLR_ VOLT 1207 CLPT_G10 POI115. VOLT 1206 CLPT-G VOLT 1193 W.CHEY 115. VOLT 1205 CLPT-G VOLT 764 CHEYENNE 115 VOLT 1203 CLPT-G VOLT 1025 WARREN 115 VOLT 1189 CLPT-G VOLT 891 SKYLINE 115 VOLT ANGLES4 PELEC1 138 SS_GEN1 ANGLE 165 CPGSTN2 G1 PELEC 137 CLR_1 ANGLE 164 CPGSTN1 S1 PELEC 142 CPGSTN_2 ANGLE 163 CPGSTN1 G2 PELEC 141 CPGSTN_1 S1 ANGLE 162 CPGSTN1 G1 PELEC 140 CPGSTN_1 G2 ANGLE 160 YELOW1 PELEC 139 CPGSTN_1 G1 ANGLE 159 WYODAK PELEC February 12,

48 Left Side (Top to Bottom) Right Side (Top to Bottom) Channel # Channel Name Channel # Channel Name ANGLES3 ANGLES5 21 RAWHIDEA ANGLE 1431 CLPT-G10 ANGLE 27 ST.VRAIN ANGLE 144 CLPT-G9 ANGLE 26 ST.VR_4 ANGLE 143 CLPT-G9 ANGLE 25 ST.VR_3 ANGLE 136 CLPT-G7 ANGLE 24 ST.VR_2 ANGLE 20 RAWHIDE ANGLE QELEC1 178 CPGSTN2 G1 QELEC 177 CPGSTN1 S1 QELEC 176 CPGSTN1 G2 QELEC 175 CPGSTN1 G1 QELEC 173 YELOW1 QELEC 172 WYODAK QELEC PELEC2 QELEC CLPT-G10 PV PELEC 1433 CLPT-G10 PV QELEC 167 CLPT-G9 W PELEC 180 CLPT-G9 W QELEC 166 CLPT-G9 W PELEC 179 CLPT-G9 WQELEC 161 CLPT-G7 G1 PELEC 174 CLPT-G7 G1 QELEC February 12,

49 Appendix E: System Diagrams February 12,

50 2020LS Stressed Scenario (CLPT-G10 offline) February 12,

51 2020LS Stressed Scenario (CLPT-G10 online) February 12,

52 2020HS Stressed Scenario (CLPT-G10 offline) February 12,

53 2020HS Stressed Scenario (CLPT-G10 online) February 12,