SYSTEM IMPACT STUDY FOR THE ANCLOTE REPOWERING PLANT PHASE I STEADY STATE AND SHORT CIRCUIT ANALYSES OCTOBER 2012 TRANSMISSION PLANNING

Transcription

1 SYSTEM IMPACT STUDY FOR THE ANCLOTE REPOWERING PLANT PHASE I STEADY STATE AND SHORT CIRCUIT ANALYSES OCTOBER 2012 TRANSMISSION PLANNING

2 THIS DOCUMENT AND ANY ATTACHMENTS HERETO ("DOCUMENT") IS MADE AVAILABLE BY PROGRESS ENERGY COMPANY UPON AND SUBJECT TO THE EXPRESS UNDERSTANDING THAT: (A) NEITHER PROGRESS ENERGY COMPANY NOR ANY OF ITS OFFICERS, DIRECTORS, AFFILIATES, AGENTS, OR EMPLOYEES MAKES ANY WARRANTY, ASSURANCE, GUARANTY, OR REPRESENTATION WITH RESPECT TO THE CONTENTS OF THE DOCUMENT OR THE ACCURACY OR COMPLETENESS OF THE INFORMATION CONTAINED OR REFERENCED IN THE DOCUMENT, AND (B) PROGRESS ENERGY COMPANY, ITS OFFICERS, DIRECTORS, AFFILIATES, AGENTS, AND EMPLOYEES SHALL NOT HAVE ANY LIABILITY OR RESPONSIBILITY FOR INACCURACIES, ERRORS, OR OMISSIONS IN, OR ANY BUSINESS OR POLICY DECISIONS MADE BY ANY DIRECT OR INDIRECT RECIPIENT IN RELIANCE ON, THIS DOCUMENT OR THE INFORMATION CONTAINED OR REFERENCED THEREIN; ALL SUCH LIABILITY IS EXPRESSLY DISCLAIMED." October 2012 Anclote Phase I Combined Cycle Plant SIS Page 2

3 Executive Summary The proposed Progress Energy Anclote Phase I Repowering Plant consists of a combined cycle power plant composed of three new combustion turbines and the existing Anclote 1 steam unit. The total summer and winter net output of the Plant is 1200 MW and 1400 MW, respectively with a 0.90 PF. The Plant will interconnect to the Progress Energy Florida 230 kv system at the existing Anclote substation in Pasco County, Florida. The current proposed in service date for the Plant is summer The results of the steady state and short circuit analyses indicate that the addition of the Plant, its associated reinforcements and required transmission system upgrades will have no significant impact on the steady state and short circuit responses of the bulk transmission system as well as on the import capability of the Southern Florida interface. The interconnection of the proposed Anclote Phase I Repowering Plant will include new transmission facilities and the upgrade of several existing transmission facilities identified in the steady state and short circuit studies. The following are the transmission facilities identified in the steady state and short circuit studies directly related to the interconnection: New breaker-and-a-half four bay 230 kv Gulf Pine Substation Two new breaker-and-a-half bays 230 kv at existing Anclote Substation New Anclote Gulf Pine 230 kv 2-bundle 795 ACSS/TW Rebuild Anclote Seven Springs 230 kv with 2-bundle 795 ACSS/TW Looping of 230 kv Seven Springs-Brookridge and Seven Springs-Lake Tarpon into Gulf Pine Substation Upgrade Seven Springs 230 kv Substation to 3000A Remove limiting elements in the Seven Springs 115 kv bus. Rebuild 115kV Brookridge-Crystal River South with 1622 ACSS/TW, miles Rebuild 115 kv Spring Hill-Heritage Tap with 1622 ACSS/TW, 4.83 miles Assume the Brooksville/Brooksville W expansion project in service Upgrade Brooksville 112 MVA transformer up to 168 MVA Remove limiting elements at East Clearwater 230/115 transformer, Hudson-Gulf Pine 230 kv, Lake Tarpon-Sheldon Road Ckt2 230 kv and Central Florida-holder 230 kv. New 115 kv 2x25 MVar cap bank at Brookridge Rebuild Wildwood City Tap-Dallas Airport Tap-Dallas Airport 69 kv with 1272 ACSS/TW, 8.6 miles Rebuild 69kV line segments from Brooksville to Consolidated Rock Tap to Croom Tap to Bushnell with 1272 ACSS/TW, 20 miles Rebuild Leesburg East-Leesburg 69 kv with 1272 ACSS/TW, 1.1 miles Upgrade 64 over-dutied circuit breakers The total gross estimate to interconnect the Anclote Phase I Repowering Plant to the Progress Energy transmission system is $160M. This cost estimate includes $9M for the transient stability upgrades provided in a separate report. October 2012 Anclote Phase I Combined Cycle Plant SIS Page 3

4 Table of Contents Executive Summary 3 Table of Contents 4 Introduction 5 System Representation 7 Base Case Steady State Models 7 Short Circuit Models 7 PV Analysis Models 7 Generator Interconnection Queue Considerations 8 Transmission Service Request Priority List Considerations 8 Methodology 9 Steady State Analysis 9 Short circuit analysis 9 PV voltage stability analysis 9 Evaluation of System Response to Normal and Contingency Conditions 10 Thermal Analysis Results Screening Criteria. 10 Voltage Analysis Results Screening Criteria. 10 Short Circuit Analysis Results Screening Criteria. 10 PV Analysis Results Screening Criteria. 10 Discussion of Study Results 11 Steady State Thermal and Voltage 11 Short Circuit 12 Third-party Impacts 13 PV Analysis 13 Costs 13 Appendix A 14 Appendix B 22 October 2012 Anclote Phase I Combined Cycle Plant SIS Page 4

5 Introduction Progress Energy Florida is proposing the construction of a combined cycle power plant with a total summer and winter net output of 1200 MW and 1400 MW, respectively with a 0.90 PF. The proposed Anclote combined cycle plant consists of three new combustion turbines and the existing Anclote No 1 steam turbine. The station service load will be 51 MW, 0.80 PF. The Plant will interconnect to the Progress Energy Florida 230 kv system at the existing Anclote substation in Pasco County, Florida. The current proposed in service date for The Plant is summer This Generation Interconnection System Impact Study evaluated steady state and short circuit system performance. The transient stability system study is available in a separate report. The impact of other relevant proposed generation projects in the study area was considered in this study. Analysis for the Plant and its impact on the Florida bulk transmission system was performed in accordance with, FERC Large Generation Interconnection Rules, NERC/FRCC Reliability Standards, and Progress Energy Florida Interconnection Requirements. The next two Figures show the proposed interconnection of the Plant to the existing Anclote 230 kv bus and the one line diagram of the local area under study. Proposed Interconnection of the Plant October 2012 Anclote Phase I Combined Cycle Plant SIS Page 5

6 One Line Diagram of the Local Area BROOKRIDGE 230.kV BKVW 230.kV SHADY HLS P3 18.kV SHADY HLS P2 18.kV SHADY HILLS 230.kV HUDSON 230.kV BKVW 115.kV BKVL 230.kV BKVL 115.kV SHADY HLS P1 18.kV ANCLOTE 230.kV 7 SPRINGS 230.kV ANCL-CTA3 19.kV ANCL-CTA2 19.kV ANCL-CTA1 19.kV ANCL COOL 230.kV 7 SPRINGS 115.kV ANCL-STA 22.kV ANCLOTE G2 22.kV GULF PINE 230.kV CURLEW 230.kV E CLEARWATER 230.kV LARGO 230.kV ULMERTON 230.kV LAKE TARPON 230.kV October 2012 Anclote Phase I Combined Cycle Plant SIS Page 6

7 System Representation Base Case Steady State Models The steady state models were based on the FRCC 2011 library cases. The years studied for power flow and voltage analyses were 2016 summer and 2016/2017 winter. The following Table shows in more detail the dispatch scenarios: Base Case Anclote Phase I 2016 Summer 2016/17 Winter 1. LRS Pass 5 case 2. Two 1120 MVA autos at CFLA (already in case) 3. Existing Anclote max 4. Bartow, Bayboro, max 5. Reduce Debary, Intercession, Hines 4 6. Use CR 5 as area swing bus 1. LRS Pass 5 case 2. Two 1120 MVA autos at CFLA (already in case) 3. Existing Anclote max 4. Bartow, Bayboro, max 5. Reduce Debary, Suwannee, HERO 6. Use CR 5 as area swing bus Repowering 1. All assumptions in the base case 2. Anclote Unit 1 repowered 3-on-1, plant net output is 1200 MW. 3. Shut off Hines 3 & All assumptions in the base case 2. Anclote Unit 1 repowered 3-on-1, plant net output is 1400 MW. 3. Shut off Debary, Intercession 4. Reduce Hines 4 to near Pmin Short Circuit Models The short circuit analysis performed by PEF s Bulk Transmission Planning utilized the FRCC 2010 series final short circuit models. The model year studied for short circuit analyses was PV Analysis Models The PV analysis was performed using the FRCC 2011 cases with the Southern Florida transfer import at 3700 MW for 2015 summer. This analysis was performed to determine the impact of the new plant on the import capability of the Southern Florida interface. October 2012 Anclote Phase I Combined Cycle Plant SIS Page 7

8 Generator Interconnection Queue Considerations There are no prior queued generator interconnection requests in the study area that might have a potential impact on the results of this study. Transmission Service Request Priority List Considerations All relevant transmission service requests with queue priority in the study area were modeled in the base case. October 2012 Anclote Phase I Combined Cycle Plant SIS Page 8

9 Methodology Steady State Analysis The base cases and the corresponding Anclote Phase I Repowering interconnection cases were compared to determine if the new Plant interconnection created thermal overloads or voltage violations, or exacerbated existing thermal overloads or voltage violations. The following contingencies were studied: All single element NERC Category B contingencies in the central-west and northern portion of the FRCC region NERC Category C2 and C5 contingencies within the FRCC region as specified by FRCC transmission owners NERC Category C3 contingencies in the vicinity of the interconnection C3 contingencies were screened by simulating all possible double contingencies within a bus subset near the point of interconnection. All branch flows and bus voltages in the central-west and northern portion of the FRCC region were monitored. Short circuit analysis The short circuit analysis was performed using PSS/E. Three phase and single line-to-ground faults were applied at all buses within 6 buses of the Anclote 230 kv bus. Fault analyses were performed according to the Progress Energy short circuit criteria. PV voltage stability analysis The PV analysis was performed using the PSS/E PV engine. Select contingencies known to have the greatest impact on the import and export capability of the State of Florida were examined. October 2012 Anclote Phase I Combined Cycle Plant SIS Page 9

10 Evaluation of System Response to Normal and Contingency Conditions Thermal Analysis Results Screening Criteria. System-intact overloads must be greater than 100 percent of rate A to be reported. Post-contingency overloads must be greater than 100 percent of rate B to be reported. Post-contingency overloads that are improved by the interconnection were excluded. Post-contingency overloads must have been made worse than the base case by 3% of the affected element s rating or greater to be reported. Voltage Analysis Results Screening Criteria. Buses in PEF and SECI were monitored for values outside of the range p.u. FPL 69, 115, 138, and 230 kv buses were monitored for values outside the range p.u. FPL 500 kv buses were monitored for values outside the range p.u. TECO 69 kv buses were monitored for values outside the range p.u. TECO 138 and 230 kv buses were monitored for values outside the range p.u. Crystal River Plant 230 kv bus voltage should remain above kv, or p.u. Turkey Point bus voltage should remain between 1.01 p.u. and 1.06 p.u. St. Lucie bus voltage should remain between 1.00 p.u. and 1.06 p.u. All other monitored areas were monitored for values outside of the range p.u. Absolute change in bus voltage between base case and the interconnection case must have been greater than 0.01 p.u to be reported. Short Circuit Analysis Results Screening Criteria. Three phase and single line-to-ground fault current on the PEF system had to exceed the interrupting rating capability of the breaker to be considered for upgrade. Three phase and single line-to-ground fault current results and short circuit cases will be provided to third parties relevant to the area under study for their own evaluation according to their breaker rating criteria. PV Analysis Results Screening Criteria. The Anclote Phase I Repowering Plant might not have an adverse impact on the transfer capability of the Southern Florida interface. October 2012 Anclote Phase I Combined Cycle Plant SIS Page 10

11 Discussion of Study Results Steady State Thermal and Voltage The following are the new and existing facilities upgrades impacted by the Anclote Phase I Repowering Plant identified in the steady state analysis: New breaker-and-a-half four bay 230 kv Gulf Pine Substation Two new breaker-and-a-half bays 230 kv at existing Anclote Substation New Anclote Gulf Pine 230 kv 2-bundle 795 ACSS/TW Rebuild Anclote Seven Springs 230 kv with 2-bundle 795 ACSS/TW o Common ROW, not on common structures between Anclote and Seven Springs Looping of 230 kv Seven Springs-Brookridge and Seven Springs-Lake Tarpon into Gulf Pine Substation Upgrade Seven Springs 230 kv Substation to 3000A Remove limiting elements in the Seven Springs 115 kv bus. Rebuild 115kV Brookridge-Crystal River South with 1622 ACSS/TW, miles Rebuild 115 kv Spring Hill-Heritage Tap with 1622 ACSS/TW, 4.83 miles Assume the Brooksville/Brooksville W expansion project in service Upgrade Brooksville 112 MVA transformer up to 168 MVA Remove limiting elements at East Clearwater 230/115 transformer, Hudson-Gulf Pine 230 kv, Lake Tarpon-Sheldon Road Ckt2 230 kv and Central Florida-holder 230 kv. New 115 kv 2x25 MVar cap bank at Brookridge Rebuild Wildwood City Tap-Dallas Airport Tap-Dallas Airport 69 kv with 1272 ACSS/TW, 8.6 miles Rebuild 69kV line segments from Brooksville to Consolidated Rock Tap to Croom Tap to Bushnell with 1272 ACSS/TW, 20 miles Rebuild Leesburg East-Leesburg 69 kv with 1272 ACSS/TW, 1.1 miles Appendix A lists in detail the results of the steady state analysis. In addition to the upgrades and topology changes listed above, the following Table lists the proposed mitigation actions under various contingency conditions: October 2012 Anclote Phase I Combined Cycle Plant SIS Page 11

12 Overloaded Element(s) Gulf Pine-Anclote 230 kv * Bushnell East-Croom Tap 69 kv Croom Tap-Consolidated Rock Tap 69 kv Consolidated Rock Tap-Brooksville 69 kv Contingency Anclote-Seven Springs 230 kv & East Clearwater-Anclote 230 kv Central Florida-Holder 230 kv & Holder-Ross Prairie 230 kv Conting ency Type Overload Magnit ude Mitigation C3 N % Reduce output at ANCL 2 C % 110.2% 110.2% Open line at Bushnell East end Crystal River-King Road Tap 230 kv Hudson 230/115 kv transformer 2 Hudson 230/115 kv transformer 1 & Hudson 230/115 kv transformer 3 Crystal River Plant-Holder 230 kv Ckt 1 Crystal River-Holder 230 kv Ckt % Reduce output at CR 1 or 2 C % Split Hudson 115 kv bus at breakers 6649, 2635, 2633 B 106.2% Reduce output at CR 1 or 2 OR Crystal River-Holder 230 kv Ckt 2 & Holder 230/69 kv transformer Crystal River Plant-Holder 230 kv Ckt 2 Crystal River-Holder 230 kv Ckt 1 C2 B 105.7% 106.2% Reduce output at CR 1 or 2 OR Haines Creek-Sorrento 230 kv Crossroads-Pasadena 115 kv Disston-Kenneth City 115 kv Pilsbury-Vinoy 115 kv Crystal River-Holder 230 kv Ckt 1 & Holder 230/69 kv transformer Camp Lake-Central Florida 230 kv & Clermont East-Central Florida 230 kv & Clermont East-Metro West 230 kv Largo-Seminole 230 kv & 40 th Street-Northeast 230 kv 16 th Street-40 th Street 115 kv 40 th Street-Northeast 230 kv & Northeast-Pilsbury 115 kv Cypress Wood-Dundee 69 kv Haines City East-Dundee 230 kv & Intercession City-Cane Island 230 kv Citrus Center-Dundee 230 kv C % C % Reduce output at CR 1 or 2 C3 N % 114.8% 108.0% Increase output at Bayboro peakers C3 N % Increase output at Bayboro peakers C % Increase output at Intercession 113.1% City if necessary West Lake Wales-Dundee 230 kv Ckt 1 West Lake Wales-Dundee 230 kv Ckt 2 Intercession City-Cane Island 230 kv Fort Meade-West Lake Wales 230 kv Inglis 115/69 kv transformer Intercession City-Cane Island 230 kv West Lake Wales-Dundee 230 kv Ckt 1 & West Lake Wales-Dundee 230 kv Ckt 2 Hines Energy-West Lake Wales Ckt 1 & Hines Energy-West Lake Wales Ckt 2 Crystal River Plant-Holder 230 kv Ckt 1 & Crystal River Plant-Holder 230 kv Ckt 2 Haines City East-Intercession City 230 kv & Citrus Center-Dundee 230 kv C % 104.2% 119.2% Increase output at Intercession City if necessary C % Increase output at Intercession City and reduce output at Hines C % Reduce output at CR 1 or 2 C % Increase output at Intercession City if necessary Short Circuit The short circuit analysis identified the impact on several circuit breakers by the new Anclote Phase I Repowering Plant and its associated new and upgraded facilities. The next Table list a summary of the circuit breakers impacted by the interconnection of the Anclote Phase Repowering Plant. Detailed short circuit analysis results are presented in Appendix B. October 2012 Anclote Phase I Combined Cycle Plant SIS Page 12

13 Breaker Voltage Class (kv) Total Number of Breakers Total 64 Third-party Impacts A number of potential third-party thermal or voltage impacts were identified. These are listed near the bottom of the table in Appendix A and will need to be evaluated by the Florida Reliability Coordinating Council s (FRCC) Transmission Working Group (TWG) during the Regional Reliability review. PV Analysis The PV analysis results indicate that the Anclote Phase I combined cycle plant interconnection will not have a negative impact on the import capability of the Southern Florida interface. Costs The following is the gross estimate of the cost to interconnect the Anclote Phase I Repowering Plant to the Progress Energy Transmission System: Steady state upgrades: $131M Short circuit upgrades: $20M Transient stability upgrades: $9M Total gross estimated costs: $160M This cost estimate includes $9M for the transient stability upgrades provided in a separate report. Any changes or modifications to the present proposal will require additional study work to identify new impacts to the transmission system. October 2012 Anclote Phase I Combined Cycle Plant SIS Page 13

14 Appendix A Anclote Phase I Repowering Steady State Results Summer STRESSED Dispatch Winter STRESSED Dispatch ContingencyAlias Affected_Element Rating 2016S_BASE Thermal_Effects MWPostCont 2016S_BASE Thermal_Effects PercentOL 2016S_1RP Thermal_Effects MWPostCont 2016S_1RP Thermal_Effects PercentOL OL_Diff Rating 2016W_BASE Thermal_Effects MWPostCont 2016W_BASE Thermal_Effects PercentOL 2016W_1RP Thermal_Effects MWPostCont 2016W_1RP Thermal_Effects PercentOL OL_Diff PEF_C HAINES CREEK TO 2072 SORRENTO CKT PEF_C CAMP LAKE TO 2124 MINNEOLA CKT PEF_C CAMP LAKE TO 2124 MINNEOLA CKT PEF_C CAMP LAKE TO 2124 MINNEOLA CKT PEF_BPRO CAMP LAKE TO 2124 MINNEOLA CKT SG2113>2164>$ CAMP LAKE TO 2124 MINNEOLA CKT PEF_C CLERMONT TO 2124 MINNEOLA CKT PEF_C5-GULFP 2267 E CLEARWATER TO 2269 LK TARPON-A CKT PEF_C5-GULFP 2267 E CLEARWATER TO 3834 ANCLOTE CKT DB2269>2272>$1)(DB2267>3834>$ LK TARPON-A TO 2280 GULF PINE CKT DB2288>3550>$1)(DB2269>2272>$ LK TARPON-A TO 2280 GULF PINE CKT DB3834>3837>$1)(DB2267>3834>$ GULF PINE TO 3834 ANCLOTE CKT PEF_C CYPRESSWOOD TO 2744 DUNDEE CKT PEF_C LK WALES TO 2834 W LAKE WALES CKT PEF_C LK WALES TO 2834 W LAKE WALES CKT PEF_C FT MEADE TO 2891 W LAKE WALES CKT PEF_C ALACHUA TAP TO 3008 ALACHUA CKT PEF_C ALACHUA TAP TO 3008 ALACHUA CKT SG3163>3174>$ FT WHITE B TO 3162 FT WHITE N CKT PEF_C FT WHITE B TO 3162 FT WHITE N CKT SG3003>3034>$ FT WHITE B TO 3162 FT WHITE N CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 14

15 SG3003>3174>$ FT WHITE B TO 3162 FT WHITE N CKT PEF_C DALS AIRP TP TO 3334 DALLAS AIRPT CKT PEF_C DALS AIRP TP TO 3432 WILDWDCTY TP CKT PEF_C WILDWDCTY TP TO 6930 WILD W CKT PEF_C WILDWDCTY TP TO 6930 WILD W CKT PEF_C ANDERSEN TO 6930 WILD W CKT PEF_C ANDERSEN TO 6930 WILD W CKT SG3521>3525>$ ANDERSEN TO 6930 WILD W CKT PEF_C ANDERSEN TO 6930 WILD W CKT PEF_C ANDERSEN TO 6930 WILD W CKT SG3551>3555>$ BUSHNELL E TO 3365 CROOM TP CKT SG3551>3555>$ CONSOLIDRKTP TO 3350 BROOKSVILLE CKT SG3551>3555>$ CONSOLIDRKTP TO 3365 CROOM TP CKT PEF_C INGLIS TO 3469 INGLIS CKT DB3451>3477>$1)(DB3451>3474>$ INVERNESS TO 3472 INVERNESS CKT DB3453>3474>$1)(DB3451>3477>$ INVERNESS TO 3472 INVERNESS CKT DB3453>3477>$1)(DB3451>3474>$ INVERNESS TO 3472 INVERNESS CKT PEF_C LEESBURG E TO 3395 LEESBURG CKT PEF_C LEESBURG E TO 3395 LEESBURG CKT SG2068>3521>$ LEESBURG E TO 3395 LEESBURG CKT PEF_C ROSS PRAIRIE TO 3435 MARIONOAKSTP CKT SG3404>3434>$ ROSS PRAIRIE TO 3435 MARIONOAKSTP CKT SG3426>3434>$ ROSS PRAIRIE TO 3435 MARIONOAKSTP CKT PEF_C LECANTO TO 3532 LECANTO CKT DB3456>3523>$1)(DB3445>3532>$ BROOKRIDGE TO 3452 HAMMOCK2 TP CKT DB3451>3519>$2)(DB3450>3518>$ BROOKRIDGE TO 3518 BROOKRIDGE CKT DB3451>3519>$2)(DB3451>3519>$ BROOKRIDGE TO 3518 BROOKRIDGE CKT DB3802>3807>$1)(DB3451>3519>$ BROOKRIDGE TO 3518 BROOKRIDGE CKT DB3456>3523>$1)(DB3445>3532>$ HAMMOCK2 TP TO 3463 HAMMOCK TP CKT PEF_C CRYSTAL RV E TO 3523 CRYSTAL RV E CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 15

16 DB3456>3523>$1)(DB3445>3532>$ HAMMOCK TP TO 3478 TWIN CO RNCH CKT SG3551>3555>$ BROOKRIDGE TO 3WNDTR BROOKRIDGE WND 2 CKT PEF_C CENTRAL FLA TO 3527 HOLDER CKT SG3551>3555>$ CENTRAL FLA TO 3527 HOLDER CKT PEF_C CRYST RVR PL TO 3526 KINGROAD PEF CKT PEF_C CRYST RVR PL TO 3527 HOLDER CKT SG3522>3527>$ CRYST RVR PL TO 3527 HOLDER CKT PEF_C CRYST RVR PL TO 3527 HOLDER CKT SG3522>3527>$ CRYST RVR PL TO 3527 HOLDER CKT SG3551>3555>$ HOLDER TO 3533 ROSS PRAIRIE CKT SG3551>3555>$ BROOKRIDGE TO 3WNDTR BROOKRIDGE WND 1 CKT DB3670>3701>$1)(DB3483>3487>$ DISSTON TO 3675 NORTHEAST CKT DB3701>3704>$1)(DB3483>3487>$ DISSTON TO 3675 NORTHEAST CKT DB3703>3704>$6)(DB3483>3487>$ BARTOW TO 3704 NORTHEAST CKT DB3703>3704>$7)(DB3483>3487>$ BARTOW TO 3704 NORTHEAST CKT DB3703>3704>$8)(DB3483>3487>$ BARTOW TO 3704 NORTHEAST CKT DB3703>3704>$6)(DB3483>3487>$ BARTOW TO 3704 NORTHEAST CKT DB3703>3704>$7)(DB3483>3487>$ BARTOW TO 3704 NORTHEAST CKT DB3703>3704>$8)(DB3483>3487>$ BARTOW TO 3704 NORTHEAST CKT DB3810>3812>$1)(DB3806>3836>$ FLORAMAR TO SPRINGS A CKT PEF_C HUDSON A TO 3836 HUDSON CKT PEF_C5-GULFP 3834 ANCLOTE TO 3930 LARGO CKT DB2245>2268>$1)(DB2244>2267>$ TRI-CITY TO 3911 ULMERTON CKT DB2268>2269>$1)(DB2244>2267>$ TRI-CITY TO 3911 ULMERTON CKT DB3475>3802>$1)(DB3451>3519>$ BROOKSVL W TO 3519 BROOKSVL W CKT DB3802>3807>$1)(DB3451>3519>$ BROOKSVL W TO 3519 BROOKSVL W CKT DB3451>3519>$2)(DB3450>3518>$ BROOKSVL W TO 3519 BROOKSVL W CKT DB3451>3519>$2)(DB3450>3451>$ BROOKSVL W TO 3519 BROOKSVL W CKT DB3802>3807>$1)(DB3446>3482>$ BROOKSVL W TO 3519 BROOKSVL W CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 16

17 Potential Third Part Impacts (To Be Evaluated Further by FRCC) Summer STRESSED Dispatch Winter STRESSED Dispatch ContingencyAlias Affected_Element Rating FMPA 2016S_BASE Thermal_Effects MWPostCont 2016S_BASE Thermal_Effects PercentOL 2016S_1RP Thermal_Effects MWPostCont 2016S_1RP Thermal_Effects PercentOL OL_Diff Rating 2016W_BASE Thermal_Effects MWPostCont 2016W_BASE Thermal_Effects PercentOL 2016W_1RP Thermal_Effects MWPostCont 2016W_1RP Thermal_Effects PercentOL OL_Diff PEF_C INTERCSN CTY TO 5352 CAN ISL CKT PEF_C INTERCSN CTY TO 5352 CAN ISL CKT PEF_C INTERCSN CTY TO 5352 CAN ISL CKT PEF_C INTERCSN CTY TO 5352 CAN ISL CKT FMPA_C INTERCSN CTY TO 5352 CAN ISL CKT SECI PEF_C MARIONOAKSTP TO 6959 MARION TP CKT SG3359>3404>$ WATERWYS TO 6960 MARION GOAB CKT SG3404>3434>$ WATERWYS TO 6960 MARION GOAB CKT SG3426>3434>$ WATERWYS TO 6960 MARION GOAB CKT PEF_C SUMMRGLN TO 6960 MARION GOAB CKT FP&L FPL_C MYAKKA TO 350 MYAKKA CKT FPL_C MYAKKA TO 350 MYAKKA CKT FPL_C MYAKKA TO 350 MYAKKA CKT SG331>337>$1 319 MYAKKA TO 350 MYAKKA CKT FPL_C SYLVAN TO 1703 YANKEE CKT FPL_C SYLVAN TO 2585 N LONGWOOD CKT FPL_C SANFORDO TO 1703 YANKEE CKT TECo SG3774>3893>$ DENHAM TO 8024 SUNLAKE CKT SG3779>3887>$ DENHAM TO 8024 SUNLAKE CKT SG3887>3893>$ DENHAM TO 8024 SUNLAKE CKT SG8402>8406>$ DENHAM TO 8024 SUNLAKE CKT SG8406>8412>$ DENHAM TO 8024 SUNLAKE CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 17

18 TEC_C JACKSON RD S TO 8106 ROCKY CR CKT SG8400>8402>$ FERN T TO 8382 JUNEAU-E CKT TEC_BPRO FERN T TO 8382 JUNEAU-E CKT TEC_C FERN T TO 8382 JUNEAU-E CKT SG8018>8024>$ CHAPMAN TO 8406 TPALM-NO CKT SG8018>8024>$ TPALM-NO TO 8412 PEBBLECK CKT TEC_C SHELDON-SE TO 8106 ROCKY CR CKT DB8000>8100>$1)(DB8000>8050>$ SHELDON ROAD TO 8002 SHELDON-NW CKT DB8110>8370>$1)(DB8000>8100>$ SHELDON ROAD TO 8002 SHELDON-NW CKT TEC_C SHELDON ROAD TO 8006 SHELDON-SE CKT SEC_C POLKPLNT TO 9050 PEBB CKT SG9000>9050>$ POLKPLNT TO 9060 PEBBLDLE CKT DB2269>8000>$3)(DB2269>8000>$ LK TARPON-A TO 8070 WESTCHSE CKT DB2269>8070>$1)(DB2269>8000>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB8000>8070>$1)(DB2269>8000>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8000>$3)(DB2269>8000>$ SHELDON ROAD TO 8070 WESTCHSE CKT DB2269>8070>$1)(DB2269>8000>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB8000>8070>$1)(DB2269>8000>$ LK TARPON-A TO 8000 SHELDON ROAD CKT SG3551>3555>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB8370>8700>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB8370>8700>$1)(DB8000>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB8370>8700>$1)(DB2269>8000>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3519>3836>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3800>3807>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2245>2249>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3834>3837>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3802>3807>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3482>7092>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3806>7105>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3451>3487>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2245>2268>$ LK TARPON-A TO 8000 SHELDON ROAD CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 18

19 DB2269>8070>$1)(DB2268>2269>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3451>3474>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3475>3802>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3809>7077>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3450>3452>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3451>3477>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3451>3519>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3453>3474>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3453>3477>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3483>3487>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3806>3807>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3445>3532>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3451>3519>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3473>7087>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3809>7085>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3812>3837>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3812>3837>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3813>3837>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3910>3911>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2244>2267>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3450>3518>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3474>7095>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3487>7103>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3805>3812>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3813>3815>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3813>3815>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2241>2243>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2242>3910>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2244>2248>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2245>3803>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3476>3477>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3805>3809>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3806>3836>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 19

20 DB3810>3812>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3911>3932>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3911>3932>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2242>2244>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2243>2245>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2243>2247>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2245>2247>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2267>3932>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2270>2272>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3450>3518>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3451>3482>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3473>3475>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3669>3677>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3670>3681>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3672>3681>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3675>3704>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3675>3704>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3677>3685>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3677>3705>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3701>3704>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3702>3704>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3702>3707>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3703>3704>$6)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3703>3704>$7)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3703>3704>$8)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3705>3707>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3806>3836>$3)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3807>3836>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3809>3810>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3812>3813>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3930>3931>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3930>3932>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB2269>8070>$1)(DB2241>3815>$ LK TARPON-A TO 8000 SHELDON ROAD CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 20

21 DB2270>3930>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3446>3450>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3446>3482>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3450>3451>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3450>3461>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3518>3519>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3518>3519>$2)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3663>3675>$A)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3663>3675>$B)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3670>3675>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3670>3701>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3672>3911>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3675>3678>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3683>3685>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT DB3683>3702>$1)(DB2269>8070>$ LK TARPON-A TO 8000 SHELDON ROAD CKT October 2012 Anclote Phase I Combined Cycle Plant SIS Page 21

22 Appendix B Anclote Phase I Repowering Short Circuit Results BUS # BUS NAME 3PH AMP BASE SLG AMP 3PH AMP 1RP SLG AMP % 3PH % SLG Comments # kv 2221 E CLEARWATER % 1.7% 26,000 A Replace 39 & 711 with 50,000 A breakers BAYVIEW % 1.6% 22,000 A Replace 1125, 1127, 1129 with 40,000 A breakers E CLEARWATER % 6.3% 20,000 A Replace 1470 & 1472 with 50,000 A breakers LK TARPON-A % 8.5% 40,000 A Replace 1864, 2969, 2970, 4548 with 63,000 A breakers DISSTON % 0.5% 27,000 A Replace 109, 123, 748 with 40,000 A breakers CROSSROADS % 0.9% 22,000 A Replace 1390 with 40,000 A breaker DISSTON % 1.3% 22,000 A Replace 4 & 141 with 40,000 A breakers GATEWAY % 1.1% 22,000 A Replace 4492 with 40,000 A breaker KENNETH CTY % 0.9% 25,000 A Replace 1621 with 40,000 A breaker ELFERS % 10.2% 22,000 A Replace 1525, 1527, 1561 with 40,000 A breakers SPRINGS A % 19.6% 22,000 A Replace 2720 with 50,000 A breaker TARPON SPNGS % 8.6% 20,000 A Replace 62, 84, 316, 4273 with 50,000 A breakers ANCLOTE % 58.5% Install 63,000 A breakers SPRINGS % 42.2% 20,000 A Replace 2734 & 2736 with 63,000 A breakers LARGO A % 1.7% 40,000 A Replace all 13 breakers with 63,000 A breakers ULMERTON % 2.0% 10,000 A Replace 26, 37, 936 with 50,000 A breakers ULMERTON % 3.9% 15,000 A Replace 964 with 63,000 A breaker GULF PINE Install 63,000 A breakers (incuded in GULF estimate) 3476 TANGERINE % 0.1% OK 25,000 A Ckt Switcher 3484 HERNANDO AIR % 1.1% OK 25,000 A Ckt Switcher 3486 PINE RIDGE % 1.2% OK 25,000 A Ckt Switcher 3811 PASCO RR % 3.3% 3RD PARTY 3839 SHADY HILLS % 8.4% 3RD PARTY 7077 NP RICHY % 3.7% 3RD PARTY 7105 PSCOT TP % 3.3% 3RD PARTY 7110 RIDGE % 3.6% 3RD PARTY October 2012 Anclote Phase I Combined Cycle Plant SIS Page 22

23 8000 SHELDON ROAD % 4.7% 3RD PARTY 8070 WESTCHSE % 5.1% 3RD PARTY Breaker count by voltage class 69 kv kv kv 27 October 2012 Anclote Phase I Combined Cycle Plant SIS Page 23

24 SYSTEM IMPACT STUDY FOR THE ANCLOTE REPOWERING PROJECT PHASE I TRANSIENT STABILITY REPORT VOLUME 1 OCTOBER 2012 Principal Contributor FABIO RODRIGUEZ, P.E.

25 THIS DOCUMENT AND ANY ATTACHMENTS HERETO ("DOCUMENT") IS MADE AVAILABLE BY PROGRESS ENERGY COMPANY UPON AND SUBJECT TO THE EXPRESS UNDERSTANDING THAT: (A) NEITHER PROGRESS ENERGY COMPANY NOR ANY OF ITS OFFICERS, DIRECTORS, AFFILIATES, AGENTS, OR EMPLOYEES MAKES ANY WARRANTY, ASSURANCE, GUARANTY, OR REPRESENTATION WITH RESPECT TO THE CONTENTS OF THE DOCUMENT OR THE ACCURACY OR COMPLETENESS OF THE INFORMATION CONTAINED OR REFERENCED IN THE DOCUMENT, AND (B) PROGRESS ENERGY COMPANY, ITS OFFICERS, DIRECTORS, AFFILIATES, AGENTS, AND EMPLOYEES SHALL NOT HAVE ANY LIABILITY OR RESPONSIBILITY FOR INACCURACIES, ERRORS, OR OMISSIONS IN, OR ANY BUSINESS OR POLICY DECISIONS MADE BY ANY DIRECT OR INDIRECT RECIPIENT IN RELIANCE ON, THIS DOCUMENT OR THE INFORMATION CONTAINED OR REFERENCED THEREIN; ALL SUCH LIABILITY IS EXPRESSLY DISCLAIMED."

26 Executive Summary The proposed Progress Energy Anclote-Phase I Repowering Plant ( Project ) consists of a combined cycle power plant composed of three new combustion turbines and the existing Anclote 1 steam unit. The winter gross output of the combined cycle Anclote-Phase I plant is 1329 MW, 0.90 PF. The Project will interconnect to the Progress Energy Florida 230 kv system at the existing Anclote substation in Pasco County, Florida. The current proposed in service date for the Project is summer The results of the transient stability analysis indicate that the addition of the Project, its associated reinforcements and required transmission system upgrades will have no significant impact on the transient stability response of the bulk transmission system. The interconnection of the proposed Project will include new transmission facilities and the upgrade of several existing transmission facilities identified in the steady state and short circuit studies. The following are the transmission facilities identified in the transient stability study directly related to the interconnection of the Project: Upgrade and/or improvement of protection systems and associated clearing times at the following 230 kv and 115 kv transmission facilities: Gulf Pine 230 kv Anclote 230 kv Seven Springs 230 kv and 115 kv Hudson 230 kv and 115 kv East Clearwater 230 and 115 kv Installation of Out of Step Protection relays (OOS) on each Anclote generating unit. Installation of Power System Stabilizers (PSS) on each Anclote CT generating unit. The gross cost estimate for the above upgrades is $9 Million. Upgrades and/or improvements of protection systems and associated clearing times should be implemented at the Lake Tarpon 500 kv and 230 kv, Largo 230 kv, and Palm Harbor 230 kv for which the Project is not responsible. These upgrades should be done as part of Progress Energy regular transmission planning process. All relevant plants and firm transactions ahead of the Project in the FRCC combined Long-Term Firm Transmission and Generation Interconnection Service Requests Queue were modeled in this study. The steady state and short circuit analyses are provided in a separate report. Any changes or modifications to the present proposal for the Project will require additional study work to identify new impacts to the transmission system. OCTOBER SIS ANCLOTE PHASE I PROJECT TRANSIENT STABILITY REPORT i

27 Table of Contents EXECUTIVE SUMMARY... I TABLE OF CONTENTS... II LIST OF FIGURES AND TABLES... III 1.0 INTRODUCTION INTERCONNECTION FACILITIES SYSTEM REPRESENTATION BASE CASE LOAD FLOWS DYNAMIC MODELING SYSTEM REINFORCEMENTS ASSOCIATED WITH THE ANCLOTE-PHASE I PROJECT TRANSIENT STABILITY ANALYSIS METHODOLOGY NORMAL CONTINGENCY ASSESSMENT EXTREME CONTINGENCY ASSESSMENT EVALUATION OF SYSTEM RESPONSE TO NORMAL AND EXTREME CONTINGENCIES DISCUSSION OF STUDY RESULTS ASSESSMENT OF NERC CATEGORIES B AND C CONTINGENCIES ASSESSMENT OF NERC CATEGORY D CONTINGENCIES CONCLUSIONS AND RECOMMENDATIONS APPENDIX I LOADFLOW SUMMARIES... I-1 APPENDIX II PLANT AND ADDITIONAL MODELS... II-1 APPENDIX III CONTINGENCY MODEL DESCRIPTIONS... III-1 III-1 CONTINGENCY DESCRIPTION... 2 III-2 SHUNT ADMITANCE... 5 APPENDIX IV TRANSIENT STABILITY RESULT PLOTS... IV-1 OCTOBER SIS ANCLOTE PHASE I PROJECT TRANSIENT STABILITY REPORT ii

28 List of Figures and Tables FIGURE 2.1 PROPOSED INTERCONNECTION OF THE PROJECT... 1 FIGURE GULF PINE 230 KV SUBSTATION... 3 FIGURE ONE LINE DIAGRAM OF LOCAL AREA... 5 TABLE DISPATCH OF RELEVANT PLANTS... 2 TABLE BULK POWER SYSTEM UPGRADES RELATED TO THE PROJECT... 4 TABLE NORMAL CONTINGENCIES... 7 TABLE EXTREME CONTINGENCIES... 8 TABLE CATEGORIES B, C AND D RESULTS OCTOBER SIS ANCLOTE PHASE I PROJECT TRANSIENT STABILITY REPORT iii

29 1.0 Introduction Progress Energy Florida is proposing the construction of a combined cycle power plant with a total winter gross output of 1329 MW, 0.90 PF ( Project ). The proposed Anclote combined cycle plant consists of three new combustion turbines and the existing Anclote 1 steam turbine, the maximum gross output of each combustion unit is 297 MW with a station service load of 35 MW, 0.80 PF. The Project will interconnect to the Progress Energy Florida 230 kv system at the existing Anclote substation in Pasco County, Florida. The current proposed in service date for Project is summer This Generation Interconnection System Impact Study evaluated transient stability system performance. Steady state and short circuit system studies are available in a separate report. The impact of other relevant proposed generation projects in the study area was considered in this study. Analysis for the Project and its impact on the Florida bulk transmission system was performed in accordance with, FERC Large Generation Interconnection Rules, NERC/FRCC Reliability Standards, and Progress Energy Florida Interconnection Requirements. 2.0 Interconnection Facilities The proposed interconnection of the Project to the PEF bulk transmission system will be through the construction of two bays at the existing Anclote 230 kv substation. The 230 kv yard will be upgraded to five breaker-and-a-half bays. Figure 2.1 shows the one line diagram for the proposed interconnection. Figure 2.1 Proposed Interconnection of the Project OCTOBER SIS ANCLOTE PHASE I PROJECT TRANSIENT STABILITY REPORT 1

30 3.0 System Representation The following sections describe in detail the system representation used in the transient stability. 3.1 Base Case Load flows Stability cases were developed with the 2010 Revision 4 FRCC dynamic library summer peak load (100%) and light load (50%) cases were used in this study. The FRCC system peak load plus losses was MW and the light load plus losses was MW. The peak and light load base cases maximized available generation in the study area and modeled the Southern-Florida interface at 3700 MW. The total Project output is modeled at a winter gross output of 1329 MW with a 35 MVA station service load with a 0.80 PF. Table shows the dispatch of major units in the study area. Table Dispatch of Relevant Plants PK-1 (MW) LL-1 (MW) LL-2 (MW) Anclote Combine Cycle Crystal River Complex 500 kv Crystal River Complex 230 kv Anclote Unit Shady Hills Higgins Bayboro Bartow SOCO-FLA Interface A detailed summary of generation dispatch, interface transfers, and voltage conditions is included in Appendix I for each of the load flows listed in Table Dynamic Modeling The dynamic model for this study was taken from the 2010 FRCC SWG library. Additional models were added to the snapshot as required to model the proposed Anclote-Phase I OCTOBER SIS ANCLOTE PHASE I PROJECT TRANSIENT STABILITY REPORT 2

31 generating plant, and to model additional protective relays where required. Data for the Anclote-Phase I units and additional protective relay models are listed in Appendix II. For the Anclote-Phase I combustion units, the generators are modeled using PSS/E model GENROU, the excitation systems are modeled as IEEE type ST6B excitation system using PSS/E model ST6B, the power system stabilizers are modeled as IEEE Dual-Input using PSS/E model PSS2B and the governors are modeled using the SIEMENS user model USGT8H. The analysis documented in this report is based on the Anclote CT generating units power system stabilizers activated. Some delayed fault clearing contingencies caused the Anclote-Phase I units to lose synchronism with the system. Out of step relays might be modeled for each Anclote-Phase I generating unit with PSS/E model SLINOS. The blinder type relay characteristic could be used and may be obtained with an ABB type RXZK 23 H impedance relay. A similar characteristic may be available with relays available from other manufactures. The analysis documented in this report did not specifically simulate the out of step relay, instead a generic FLEX code model was used to trip units for either a preset angle or speed deviation. This study includes detailed models of the out of step special protection systems (SPS) and automatic under frequency load shedding schemes as specified by the FRCC SWG. 3.3 System Reinforcements Associated with the Anclote-Phase I Project The upgrades associated with the Project include steady state, short circuit and stability related upgrades as they relate to the bulk power system. Figures and show the one line diagram of the proposed new 230 kv Gulf Pine substation and the one line diagram of the local area, respectively. Table lists the bulk power system upgrades identified in the steady state analysis that were included in this study. Figure Gulf Pine 230 kv Substation OCTOBER SIS ANCLOTE PHASE I PROJECT TRANSIENT STABILITY REPORT 3