Engineering Study Report: FortisAlberta Inc. Plamondon 353S Capacity Increase. Contents

Transcription

1 APPENDIX A CONNECTION ASSESSMENT

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4 : FortisAlberta Inc. Plamondon 5S Capacity Increase Contents Executive Summary.... Introduction Project Project Overview Load Component Generation Component Study Scope Study Objectives Studies Performed Report Overview Criteria, System Data, and Study Assumptions Criteria, Standards, and Requirements AESO Reliability Criteria Authoritative Documents (ADs) Load and Generation Assumptions Load Assumptions Generation Assumptions Intertie Flow Assumptions..... System Projects..... Customer Connection Projects Facility Ratings and Shunt Elements Voltage Profile Assumptions.... Study Methodology Study Objectives Study Scenarios Connection Studies Carried Out Power Flow Analysis Contingencies Studied Voltage Stability (PV) Analysis Contingencies Studied.... Pre-Connection System Assessment Pre-Connection Power Flow Analysis Scenario # 06 SP Pre-Connection Scenario # 06 WP Pre-Connection Connection Alternative Overview Connection Alternatives Examined Connection Alternatives Not Selected for Further Studies Connection Alternatives Selected for Further Studies Technical Analysis of the Connection Alternative Preferred Alternative Power Flow Analysis Voltage Stability Analysis Conclusions.... Project Interdependencies Summary and Conclusion... AESO Project Number: P60 March, 06

5 : FortisAlberta Inc. Plamondon 5S Capacity Increase Attachments Attachment A Attachment B Attachment C Pre-Connection Power Flow Analysis Results Post-Connection Power Flow Analysis Results Post-Connection Voltage Stability Analysis Results Figures Figure : Transmission system in Athabasca / Lac La Biche area... Tables Table -: Post-Contingency Voltage Deviation Guidelines for Low Voltage Busses... 0 Table : Area Forecast Load (0 LTO)... 0 Table : Dispatch levels of Existing Generators in the Study Area... 0 Table : Summary of System Projects Included in the Study Cases... Table 5: Summary of Customer Connection Projects in the Study Area... Table 6: Summary of Transmission Line Ratings in the study area... Table : Summary of Transformer Ratings... Table 8: Summary of Shunt Elements in the Study Area... Table 9: Summary of Voltage at Key Nodes in the Study Area... Table 0: Summary of Study Scenario Assumptions... 5 Table : Summary of Studies Performed... 6 Table : Summary of Pre-Connection System Performance Pre-connection, Scenario #... 8 Table : Summary of Pre-Connection System Performance Pre-connection, Scenario #... 8 Table : Summary of Post-Connection System Performance Scenario #... Table 5: Summary of Post-Connection System Performance Scenario #... Table 6: Post-Connection System PV Analysis for five worst contingencies Post-connection, Scenario #... AESO Project Number: P60 March, 06

6 : FortisAlberta Inc. Plamondon 5S Capacity Increase Executive Summary Project Overview FortisAlberta Inc. (FortisAlberta), in its capacity as the legal owner of distribution facilities (DFO), has submitted a system access service request (SASR) to the Alberta Electric System Operator (AESO) to meet FortisAlberta s distribution reliability criteria and serve load growth in the Plamondon area. The SASR includes a request for a Rate DTS, Demand Transmission Service, contract capacity increase from 5.9 MW to 8. MW for the system access service provided at the existing Plamondon 5S substation, and a request for transmission development (collectively, the Project). The DFO also requested upgrades to the existing Plamondon 5S substation. The scheduled in-service date for the Project is November, 06. This report details the system performance studies undertaken to assess the impact of the Project on the Alberta interconnected electric system (AIES). Existing System The Project is geographically located in the AESO planning area of Athabasca / Lac La Biche (Area ), which is part of the AESO Northeast Planning Region. The Athabasca / Lac La Biche area is surrounded by the planning areas of Fort McMurray (Area 5), Cold Lake (Area 8), Vegreville (Area 56), Fort Saskatchewan (Area ), Edmonton (Area 60), Wabamun (Area 0), Swan Hills (Area 6), and High Prairie (Area ). From a transmission system perspective, the Athabasca / Lac La Biche area mainly consists of 8/ kv transmission systems. The area is also served by a 0 kv network through the Heart Lake 898S substation, located in the Athabasca / Lac La Biche area, and the North Barrhead 69S and North Calder S substations, which are located in surrounding planning areas. Study Summary Study area for the Project The study area for the Project consists of the Athabasca / Lac La Biche area and the tie lines connecting the area to the rest of the AIES (6L, 9L90, 9L, 9L, 9L8, L, 9L, 9L, and LA808). All transmission facilities within the study area were studied and monitored to assess the impact of the Project on the AIES, including any violations of the Reliability Criteria (as defined in Section.). Studies performed for the Project Power flow analysis was performed for the 06 winter peak (WP) and 06 summer peak (SP) pre-connection and post-connection scenarios. Voltage stability analysis was performed only for the 06 WP post-connection scenario. AESO Project Number: P60 March, 06

7 : FortisAlberta Inc. Plamondon 5S Capacity Increase Results of the pre-connection studies No Reliability Criteria violations were observed for any of the pre-connection study scenarios. Connection alternative examined for the Project FortisAlberta, as the DFO in the Plamondon area, examined and ruled out the use of load shifting and distribution system upgrades to meet FortisAlberta s distribution reliability criteria and to serve load growth in the area. This report examined three transmission alternatives to meet the DFO s request. Alternative : Upgrade the existing Plamondon 5S substation by adding a 8/5 kv transformer with a minimum transformation capacity of 0 MVA, and by adding a 8 kv circuit breaker. Alternative : Upgrade the existing Lac La Biche 5S substation, including adding a 8/5 kv transformer with a minimum transformation capacity of approximately 0 MVA. Alternative : Upgrade the existing Waupisoo 05S substation, including adding a 8/5 kv transformer with a minimum transformation capacity of approximately 0 MVA. Connection alternative selected for further examination Alternative was selected for further study. The DFO indicated that Alternative and Alternative did not satisfy the DFO s distribution planning criteria. The DFO determined that Alternative and Alternative were not technically acceptable; therefore, Alternative and Alternative were not selected for further study. Results of the post-connection studies The following is a summary of the results of the post-connection studies: Category A (N-G-0) conditions Under Category A conditions, no Reliability Criteria violations were observed for any of the postconnection scenarios. Category B (N-G-) contingency conditions Under Category B contingency conditions, no Reliability Criteria violations were observed for any of the post-connection scenarios. Conclusions and Recommendation Based on the study results, Alternative is technically viable. The connection assessment indicates that the Project will not adversely impact the performance of the AIES. It is recommended to proceed with the Project using Alternative as the preferred option to respond to the DFO s request for system access service. For Alternative, a transformer size of MVA would be recommended based on good electric industry practice and under advisement from the legal owner of transmission facilities regarding its asset management and inventory practices. AESO Project Number: P60 5 March, 06

8 : FortisAlberta Inc. Plamondon 5S Capacity Increase. Introduction This presents the results of the study conducted to assess the impact of the Project (as defined below) on the performance of the Alberta interconnected electric system (AIES).. Project.. Project Overview FortisAlberta Inc. (FortisAlberta), in its capacity as the legal owner of distribution facilities (DFO), has submitted a system access service request (SASR) to the Alberta Electric System Operator (AESO) to meet FortisAlberta s distribution reliability criteria and to serve load growth in the Plamondon area. The SASR includes a request for a Rate DTS, Demand Transmission Service, contract capacity increase from 5.9 MW to 8. MW for the system access service provided at the existing Plamondon 5S substation, and a request for transmission development (collectively, the Project). The DFO also requested upgrades to the existing Plamondon 5S substation. The scheduled in-service date (ISD) for the Project is November, Load Component The expected power factor is 0.9 The DFO has requested a Rate DTS contract capacity increase from 5.9 MW to 8. MW for the system access service provided at the existing Plamondon 5S substation... Generation Component There is no generation component associated with the Project... Study Scope... Study Objectives The objectives of the study are the following: Assess the impact of the Project on the performance of the AIES. Identify any violations of the relevant criteria, standards or requirements of the AESO, both pre- and post-connection of the Project. Recommend mitigation measures, if required, to enable the reliable connection of the Project to the AIES.... Study Area Description The Project is geographically located in the AESO planning area of Athabasca / Lac La Biche (Area ), which is part of the AESO Northeast Planning Region. The Athabasca / Lac La Biche AESO Project Number: P60 6 March, 06

9 : FortisAlberta Inc. Plamondon 5S Capacity Increase area is surrounded by the planning areas of Fort McMurray (Area 5), Cold Lake (Area 8), Vegreville (Area 56), Fort Saskatchewan (Area ), Edmonton (Area 60), Wabamun (Area 0), Swan Hills (Area 6), and High Prairie (Area ). From a transmission system perspective, the Athabasca / Lac La Biche area mainly consists of 8/ kv transmission systems. The area is also served by a 0 kv network through the Heart Lake 898S substation, located in the Athabasca / Lac La Biche area, and the North Barrhead 69S and North Calder S substations, which are located in surrounding planning areas. The study area for the Project consists of the Athabasca/Lac La Biche area. The study area also includes the tie lines connecting this planning area to neighbouring planning areas. All transmission facilities within the study area were studied and monitored to assess the impact of the Project on the AIES, including any violations of the Reliability Criteria (as defined in Section.). Figure : Transmission system in Athabasca / Lac La Biche area 5 - Fort McMurray 9L55 (to McMillan 885S) 9L ROUND HILL 85S 9L90 (to Leismer S) IPIATIK 6S 6L (to Pike 0S) 9L (to Mitsue S) L0 (to Sarah Lake S) 0 - Wabamun 905L (to Wabamun 9S) NORTH BARRHEAD 69S 9L CHERHILL 8S 06L (to Sundance 0P) - Athabasca / Lac La Biche L L FLATBUSH 500S Westlock (WST) WESTLOCK 8S L (to Junction) NORTH ST. ALBERT S L GRASSLAND 8S APF Athabasca (AFG) COLINTON 59S 9L 898L 60 - Edmonton L CLYDE 50S N.W. CARDIFF 9S 9S 90L (to Poundmaker) NORTH CALDER S 90L 0L 6L (to Lamoureux S) 96L CASTLE DOWNS 0CV5 (to Victoria 5S) 90L (to Lamoureux S) FLAT LAKE S 96AL 6L BOYLE 56S ABEE S WEASEL CREEK 9S WAUPISOO 05S LA808 (to 808AL Junction) L - Fort Sask. PLAMONDON 5S 8L THOMPSON 0S 9L (to Whitby Lake 89S) 9L960/9L96 (to Deerland S) 88AL 88L LAC LA BICHE 5S Other Generator HEART LAKE 898S 9L 9L8 L 89L WHITEFISH LAKE 85S 8 or kv Substation 0 kv Substation 500 kv Substation This diagram contains a simplified version of the system configuration. Normally Open Line Technical detail has been simplified for illustration purposes. It does not indicate geographical locations of facilities. Currency Date: L6 9L 8L WINEFRED 88S (to Marguerite Lake 86S) 8/ kv 5L KIRBY 65S 8 - Cold Lake P60 Area Transmission System 8/ kv Double Circuit 0 kv 0 kv Double Circuit P60 Project Area AESO Planning Areas... Existing Constraints Currently, constraints in the Northeast Region of the AIES are managed in accordance with the procedures set out in Section 0. of the ISO rules, Real Time Transmission Constraint Management (TCM Rule). AESO Project Number: P60 March, 06

10 : FortisAlberta Inc. Plamondon 5S Capacity Increase... AESO Long-Term Plans The AESO 05 Long-term Transmission Plan (05 LTP) includes the following system developments in the Athabasca / Lac La Biche area in the near term (by 00) : Add new 8 kv line between Abee and Waupisoo substations Rebuild 8 kv line between North Calder and Viscount substations in north Edmonton and onto Cardiff substation near Morinville to higher capacity... Studies Performed The following studies were performed for the pre-connection analysis: Power flow analysis (Category A conditions and Category B contingencies) The following studies were performed for the post-connection analysis: Power flow analysis (Category A conditions and Category B contingencies) Voltage stability analysis (Category A conditions and Category B contingencies).. Report Overview The Executive Summary provides a high-level summary of the report and its conclusions. Section provides an introduction of the Project. Section describes the criteria, system data, and study assumptions used in this study. Section presents the study methodology used in this study. Section discusses the pre-connection system assessment. Section 5 presents the connection alternatives examined. Section 6 provides a technical analysis of the postconnection system assessment for the alternatives selected for further study. Section discusses project interdependencies. Section 8 presents the conclusions and recommendations of this study. The 05 LTP document is available on the AESO website. The 05 LTP identifies the near-term transmission developments in the Athabasca / Lac La Biche area on page 5. AESO Project Number: P60 8 March, 06

11 : FortisAlberta Inc. Plamondon 5S Capacity Increase. Criteria, System Data, and Study Assumptions.. Criteria, Standards, and Requirements.. AESO Reliability Criteria The Transmission Planning (TPL) Standards, which are included in the Alberta Reliability Standards, and the AESO s Transmission Planning Criteria Basis and Assumptions (collectively, the Reliability Criteria) were applied to evaluate system performance under Category A system conditions (i.e., all elements in-service) and following Category B contingencies (i.e., single element outage), prior to and following the studied alternatives. Below is a summary of Category A and Category B system conditions. Category A, often referred to as the N-0 condition, represents a normal system with no contingencies and all facilities in service. Under this condition, the system must be able to supply all firm load and firm transfers to other areas. All equipment must operate within its applicable rating, voltages must be within their applicable range, and the system must be stable with no cascading outages. Category B events, often referred to as an N- or N-G- with the most critical generator out of service, result in the loss of any single specified system element under specified fault conditions with normal clearing. These elements are a generator, a transmission circuit, a transformer, or a single pole of a DC transmission line. The acceptable impact on the system is the same as Category A. Planned or controlled interruptions of electric supply to radial customers or some local network customers, connected to or supplied by the faulted element or by the affected area, may occur in certain areas without impacting the overall reliability of the interconnected transmission systems. To prepare for the next contingency, system adjustments are permitted, including curtailments of contracted firm (non-recallable reserved) transmission service electric power transfers. The TPL standards, TPL-00-AB-0 and TPL-00-AB-0, have referenced Applicable Ratings when specifying the required system performance under Category A and Category B events. For the purpose of applying the TPL standards to the studies documented in this report, Applicable Ratings are defined as follows: Seasonal continuous thermal rating of the line s loading limits. Highest specified loading limits for transformers. For Category A conditions: Voltage range under normal operating condition per AESO Information Document ID# 00-00RS. For the busses not listed in ID#00-00RS, Table - in the Transmission Planning Criteria Basis and Assumptions applies. For Category B conditions: The extreme voltage range values per Table - in the Transmission Planning Criteria Basis and Assumptions. Desired post-contingency voltage change limits for three defined post event timeframes as provided in Table -, below. Filed under a separate cover AESO Project Number: P60 9 March, 06

12 : FortisAlberta Inc. Plamondon 5S Capacity Increase Table -: Post-Contingency Voltage Deviation Guidelines for Low Voltage Busses Parameter and Reference Point Post Transient (Up to 0 sec.) Time Period Post Auto Control (0 sec. to 5 min.) Post Manual Control (Steady State) Voltage deviation from steady state at low voltage bus ±0% ±% ±5%... Authoritative Documents (ADs) The AESO information document ID# 00-00RS, General Operating Practices Voltage Control, which relates to Section 0. of the ISO rules, Maintaining Network Voltage, was applied to establish the pre-contingency voltage profile in the study area and its vicinity... Load and Generation Assumptions... Load Assumptions Table presents the AESO 0 Long-term Outlook (0 LTO) corporate forecast for the Athabasca / Lac La Biche area (Area ) at time of area peak. Table : Area Forecast Load (0 LTO) Area Name and Season Area Athabasca / Lac La Biche AIL (w/o losses) Summer peak 9.0 Winter peak 0 Summer peak 0,8.0 Winter peak,5.0 Forecast Load (MW) Generation Assumptions Table provides the study area generation assumptions used in the study scenarios. ALPAC is considered to be the critical generating unit for the purpose of the studies, and is assumed offline for the power flow and voltage stability analyses. Table : Dispatch levels of Existing Generators in the Study Area Generator Name Generator ID Maximum Capacity (MW) Dispatch Level in the Study Scenarios (MW) 06 SP 06 WP DAPP (Westlock G) 8 ALPAC offline offline ALPAC.9 0. ALPAC AESO Project Number: P60 0 March, 06

13 : FortisAlberta Inc. Plamondon 5S Capacity Increase Generator Name Generator ID Maximum Capacity (MW) Dispatch Level in the Study Scenarios (MW) ALPAC Intertie Flow Assumptions The Alberta-BC, Alberta-Montana, and Alberta-Saskatchewan intertie points are deemed to be too far away to have any material impact on the assessment of the requested connection. Therefore the intertie flows were dispatched the same as in the AESO s base cases. The Western Alberta Transmission HVDC Line (WATL) and the Eastern Alberta Transmission HVDC Line (EATL) assumptions were expected to have minimal impact for the connection studies. Therefore, HVDC assumptions are kept consistent with that in the AESO planning base cases and not adjusted for this study... System Projects Table identifies the system transmission projects that were included in the studies. Table : Summary of System Projects Included in the Study Cases Project ID Description ISD 0 Christina Lake Area Development In Service.. Customer Connection Projects Table 5 identifies customer connection projects in the study area. Table 5: Summary of Customer Connection Projects in the Study Area Planning Area Queue Position* Project Number Project Name Planned ISD Modelled** in the Study cases Fortis Colinton 59S Transformer Addition Q-06 No*** 8 66 Fortis Boyle 56S Upgrade Q-06 No*** Notes: * Per the AESO Connection Queue posted in February 06. ** These projects are dispatched per the load and generation levels set out in Section.. and Section... *** The scope of these projects is equipment addition without a Rate DTS increase. These connection projects will not affect the results of this connection assessment or the conclusions and recommendations contained in this report. AESO Project Number: P60 March, 06

14 : FortisAlberta Inc. Plamondon 5S Capacity Increase.5. Facility Ratings and Shunt Elements Table 6 to AESO Project Number: P60 March, 06

15 : FortisAlberta Inc. Plamondon 5S Capacity Increase Table 8 provide the ratings of the existing key transmission facilities in the Athabasca planning area (area ). Table 6: Summary of Transmission Line Ratings in the study area Transmission Lines Summer Rating (MVA) Winter Rating (MVA) 8L (Lac La Biche 5S to Plamondon 5S) 8L (Plamondon 5S to Waupisoo 05S) 6L (Waupisoo 05S to Boyle 56S) L (Boyle 56S to Colinton 59S) 86 9 L (Colinton 59S to Clyde 50S) L (Clyde 50S to NW Cardiff 9S) L (NW Cardiff 9S to Viscount 9S) L (Clyde 50S to Westlock 8S) L (Westlock 8S to North Barrhead 69S) L (Lac La Biche 5S to Whitby Lake 89S) L (Lac La Biche 5S to 88L Tap) L (88L Tap to Heart Lake 898S) 9 6 9L (Whitefish Lake 85S to Heart Lake 898S) L8 (Whitefish Lake 85S to Heart Lake 898S) L (Heart Lake 898S to Ipiatik Lake 6S) 9 6L (Ipiatik Lake 6S to Pike 0S) 9 Table : Summary of Transformer Ratings Station Name and Number Transformer MVA Rating Heart Lake 898S T-0/8kV 00 North Barrhead 69S T-0/8kV 9 North Calder S T6 0/8 kv 8 AESO Project Number: P60 March, 06

16 : FortisAlberta Inc. Plamondon 5S Capacity Increase Table 8: Summary of Shunt Elements in the Study Area Bus Number Bus Name Area Name Blk Steps Blk Bstep (Mvar) Blk Steps Blk Bstep (Mvar) 8.00 ATHABASC ATHABASC LAC LA 8.00 ATHABASC WINEFRE 8.00 ATHABASC 0 WAUP 8.00 ATHABASC ATHABASC Voltage Profile Assumptions The AESO ID# 00-00RS is used to establish normal system (i.e., pre-contingency) voltage profiles for key area busses prior to commencing any studies. Table - of the Transmission Planning Criteria Basis and Assumptions applies for all the busses not included in the ID# 00-00RS. These voltages will be utilized to set the voltage profile for the study base cases prior to power flow analysis. The key bus voltages for the study area for the project are shown in Table 9. Table 9: Summary of Voltage at Key Nodes in the Study Area Substation Nominal Voltage (kv) Minimum Operating Limit (kv) Desired Range (kv) Maximum Operating Limit (kv) Whitefish Lake 85S Heart Lake 898S North Barrhead 69S North Calder S Lac La Biche 5S AESO Project Number: P60 March, 06

17 : FortisAlberta Inc. Plamondon 5S Capacity Increase. Study Methodology.. Study Objectives The objectives of the study are the following: Assess the impact of the Project on the performance of the AIES. Identify any violations of the relevant criteria, standards or requirements of the AESO, both pre- and post-connection of the Project. Recommend mitigation measures, if required, to enable the reliable integration of the project to the AIES... Study Scenarios Table 0 summarizes the study scenarios used for the connection studies. Table 0: Summary of Study Scenario Assumptions Scenario No. Year/Season Load Pre-connection System Project Load (MW) 06 SP WP 5.9 Post-connection system 06 SP WP 8... Connection Studies Carried Out Power flow and voltage stability studies were performed using 06 SP and 06 WP scenarios. The following studies were performed for the pre-connection analysis: Power flow analysis (Category A conditions and Category B contingencies) The following studies were performed for the post-connection analysis: Power flow analysis (Category A conditions and Category B contingencies) Voltage stability analysis (Category A conditions and Category B contingencies) Since completion of the studies, the ISD of the Project has changed from September 06 to November 06. The change in ISD does not have a material impact on the study results and the conclusions and recommendations contained in this report. AESO Project Number: P60 5 March, 06

18 : FortisAlberta Inc. Plamondon 5S Capacity Increase Table : Summary of Studies Performed Scenario(s) Studied Pre- Connection Post- Connection Studies Performed System Conditions Studied,, Power Flow Category A and B - Voltage Stability Category A and B.. Power Flow Analysis Pre- and post-connection power flow analysis was conducted to identify thermal overloads or transmission voltage violations per the Reliability Criteria, and to identify any deviations from the desired limits in Table -. The purpose of the power flow analysis is to quantify any incremental violations in the study area after the Project is connected. Point-of-delivery (POD) low voltage bus deviations were assessed by first locking all tap changers and area capacitors to identify any post-transient voltage deviations above 0%. Tap changers were then allowed to move while capacitors remained locked to determine if any voltage deviations above % were found in the area. Once all taps and capacitor controls were allowed to adjust, voltage deviations above 5% were reported for both the pre-connection and post-connection networks. PSS/E contingency power flow analysis function was used as the study tool.... Contingencies Studied The study includes all Category B contingencies (8 kv and above) within the study area and the tie lines from the study area to the surrounding areas. For the power flow analysis, the study area was monitored for voltage criteria violations and thermal violations under Category A conditions and under Category B contingency conditions. The studied contingencies include all transmission single outages (Category B contingencies) within the study area, including the tie lines connecting the study area to surrounding planning areas..5. Voltage Stability (PV) Analysis The objective of the voltage stability analysis is to determine the ability of the network to maintain voltage stability at all the busses in the system under normal and abnormal system conditions. The Power-Voltage (PV) curve is a representation of voltage change as a result of increased power transfer between two systems. The reported incremental transfers will be to the collapse point. As per the AESO requirements, no assessment based upon other criteria such as minimum voltage will be made at the PV minimum transfer. Voltage stability analysis for post-connection scenarios will be performed. For load connection projects, the load level modelled in post-connection scenarios are the same or higher than in pre-connection scenarios. Therefore, voltage stability analysis for pre-connection scenarios will only be performed if postconnection scenarios show voltage stability criteria violations. AESO Project Number: P60 6 March, 06

19 : FortisAlberta Inc. Plamondon 5S Capacity Increase The voltage stability analysis was performed according to the Western Electricity Coordinating Council (WECC) Voltage Stability Assessment Methodology. WECC voltage stability criteria states, for load areas, post-transient voltage stability is required for the area modeled at a minimum of 05% of the reference load level for system normal conditions (Category A) and for single contingencies (Category B). For this standard, the reference load level is the maximum established planned load. Typically, voltage stability analysis is carried out assuming the worst case scenarios in terms of loading. The voltage stability analysis was performed by increasing load in the Athabasca area, and increasing the corresponding generation in Wabamun Planning Area (Area 0)..5.. Contingencies Studied The voltage stability analysis was performed for Category A conditions and all Category B contingencies (8 kv and above) within the study area and the tie lines from the study area to the surrounding areas. AESO Project Number: P60 March, 06

20 : FortisAlberta Inc. Plamondon 5S Capacity Increase. Pre-Connection System Assessment.. Pre-Connection Power Flow Analysis The pre-connection system is defined as the system configuration without the Project. The steady-state performance of the pre-connection system was assessed under the 06 SP and 06 WP study scenarios. The power flow analyses were based on the criteria, system data and study assumptions as described in Section... Scenario # 06 SP Pre-Connection No Reliability Criteria violations were observed under Category A conditions. No Reliability Criteria violations were observed under Category B contingency conditions. The results of the power flow analysis are summarized in Table and shown in the power flow diagrams in Attachment A. Table : Summary of Pre-Connection System Performance Pre-connection, Scenario # Contingency Thermal Overloads Voltage Performance N-0: Normal Operation None Acceptable N-: All studied contingencies None Acceptable... Scenario # 06 WP Pre-Connection No Reliability Criteria violations were observed under Category A conditions. No Reliability Criteria violations were observed under Category B contingency conditions. The results of the power flow analysis are summarized in Table and shown in the power flow diagrams in Attachment A. Table : Summary of Pre-Connection System Performance Pre-connection, Scenario # Contingency Thermal Overloads Voltage Performance N-0: Normal Operation None Acceptable N-: All studied contingencies None Acceptable AESO Project Number: P60 8 March, 06

21 : FortisAlberta Inc. Plamondon 5S Capacity Increase 5. Connection Alternative 5.. Overview FortisAlberta, as the DFO in the Plamondon area, examined and ruled out the use of load shifting and distribution system upgrades to meet FortisAlberta s distribution reliability criteria and serve load growth in the area. 5 This report examined three transmission alternatives to meet the DFO s request Connection Alternatives Examined Below is a description of the developments associated with each transmission alternative examined for the Project. Alternative Upgrade the Plamondon 5S substation Alternative involves upgrading the existing Plamondon 5S substation by adding a 8/5 kv transformer Add a 8/5 kv transformer with a minimum transformation capacity of 0 MVA; Add a 8 kv circuit breaker Alternative Upgrade the Lac La Biche 5S substation Alternative involves upgrading the existing Lac La Biche 5S substation, including adding a 8/5 kv transformer with a minimum transformation capacity of approximately 0 MVA. Alternative Upgrade the Waupisoo 05S substation Alternative involves upgrading the existing Waupisoo 05S substation, including adding a 8/5 kv transformer with a minimum transformation capacity of approximately 0 MVA Connection Alternatives Not Selected for Further Studies The DFO indicated that Alternative and Alternative did not satisfy the DFO s distribution planning criteria. The DFO determined that Alternative and Alternative were not technically acceptable; therefore, Alternative and Alternative were not selected for further study. 5 The DFO s analysis is reported in sections and 5 of the FortisAlberta Need for Development, Plamondon 5S Upgrade report, which is filed under a separate cover. 6 This alternative reflects more up to date engineering design than the alternative identified in the FortisAlberta Need for Development, Plamondon 5S Upgrade report, which is filed under a separate cover. AESO Project Number: P60 9 March, 06

22 : FortisAlberta Inc. Plamondon 5S Capacity Increase 5... Connection Alternatives Selected for Further Studies Alternative was selected for further studies. AESO Project Number: P60 0 March, 06

23 : FortisAlberta Inc. Plamondon 5S Capacity Increase 6. Technical Analysis of the Connection Alternative 6.. Preferred Alternative 6.. Power Flow Analysis The power flow analyses were based on the criteria, system data and study assumptions as described in Section Scenario # 06 SP Post-Connection No Reliability Criteria violations were observed under Category A conditions. No Reliability Criteria violations were observed under Category B contingency conditions. The results of the power flow analysis are summarized in Table and shown in the power flow diagrams in Attachment B. Table : Summary of Post-Connection System Performance Scenario # Contingency Thermal Overloads Voltage Performance N-0: Normal Operation None Acceptable N-: All studied contingencies None Acceptable 6... Scenario # 06 WP Post-Connection No Reliability Criteria violations were observed under Category A conditions. No Reliability Criteria violations were observed under Category B contingency conditions. The results of the power flow analysis are summarized in Table 5 and shown in the power flow diagrams in Attachment B. Table 5: Summary of Post-Connection System Performance Scenario # Contingency Thermal Overloads Voltage Performance N-0: Normal Operation None Acceptable N-: All studied contingencies None Acceptable 6... Voltage Stability Analysis Voltage stability analysis was conducted using the 06 WP post-connection scenario to investigate the system active power margins after the Project under Category A conditions and Category B contingency conditions. The total load of 0 MW in the Athabasca area was considered as the starting point of the PV analysis. The sink sub-system includes all loads in the AESO Project Number: P60 March, 06

24 : FortisAlberta Inc. Plamondon 5S Capacity Increase Athabasca area. The source system was formed by the generation in the Wabamun area (Area 0). The voltage stability analysis confirms that there are no voltage stability criteria violations after the Project. The voltage stability margins under Category A conditions and for the five worst contingencies under Category B system conditions are listed in Table 6. The PV plots are presented in Attachment C. Table 6: Post-Connection System PV Analysis for five worst contingencies Post-connection, Scenario # Operation Conditions 06 WP Forecasted load (MW) 05% Margin (MW) Nose Point (MW) Meets Voltage Criteria? N-0: Normal Operation. YES N-: 8L (Lac La Biche 5S to Plamondon 5S). YES N-: 8L (Plamondon 5S to Waupisoo 05S) YES N-: 6L (Waupisoo 05S to Boyle 56S) YES N-: 0L (Boyle 56S to Colinton 59S) 06.0 YES N-: L (Colinton 59S to Clyde 50S) 8.5 YES 6.. Conclusions Power flow results indicate that there are no thermal criteria violations or voltage criteria violations prior to and after the Project. The study results confirm that the voltage stability margin of the study area meets the AESO requirement after the Project. AESO Project Number: P60 March, 06

25 : FortisAlberta Inc. Plamondon 5S Capacity Increase. Project Interdependencies No project interdependencies were identified. AESO Project Number: P60 March, 06

26 : FortisAlberta Inc. Plamondon 5S Capacity Increase 8. Summary and Conclusion Project Overview The DFO has submitted a SASR to the AESO to meet the DFO s distribution reliability criteria and to serve load growth in the Plamondon area. The SASR includes a request for a Rate DTS, Demand Transmission Service, contract capacity increase from 5.9 MW to 8. MW for the system access service provided at the existing Plamondon 5S substation, and a request for transmission development (collectively, the Project). The DFO also requested upgrades to the existing Plamondon 5S substation. The scheduled in-service date for the Project is November, 06. This report detailed the system performance studies undertaken to assess the impact of the Project on the Alberta interconnected electric system (AIES). Conclusions and Recommendation Based on the study results, Alternative is technically viable. The connection assessment indicates that the Project will not adversely impact the performance of the AIES. It is recommended to proceed with the Project using Alternative as the preferred option to respond to the DFO s request for system access service. For Alternative, a transformer size of MVA would be recommended based on good electric industry practice and under advisement from the legal owner of transmission facilities regarding its asset management and inventory practices. AESO Project Number: P60 March, 06

27 : FortisAlberta Inc. Plamondon 5S Capacity Increase Attachment A: Pre-Connection Power Flow Analysis Results AESO Project Number: P60 March, 06

28 R 0..R 6.0.R -. 9 ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - SYSTEM NORMAL 06 SP PRE-CONNECTION TUE, OCT :6 kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

29 R 0. 8.R 6.0.0R -. 9 ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 8L 06 SP PRE-CONNECTION TUE, OCT :6 kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

30 R R 6.0 R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 8L- 06 SP PRE-CONNECTION TUE, OCT :6 kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

31 R R R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 6L 06 SP PRE-CONNECTION TUE, OCT :6 kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

32 R 0..8R 6.0.R -. 9 ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-5 - CONTINGENCY 0L 06 SP PRE-CONNECTION TUE, OCT :6 kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

33 R 0..8R 6.0.R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-6 - CONTINGENCY L 06 SP PRE-CONNECTION TUE, OCT :6 kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

34 R 0..R 6.0.R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 9L 06 SP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

35 R 0..5R 6.0.8R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-8 - CONTINGENCY L 06 SP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

36 R 0..8R 6.0.R -. 9 ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-9 - CONTINGENCY 88L 06 SP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

37 R 9..9R.9.R ALPAC R.0. 9 ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-0 - SYSTEM NORMAL 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

38 R 9..R.9 6.6R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 8L 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

39 R 9. 6.R.9 9.R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 8L- 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

40 R 9..R.9 6.9R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 6L 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

41 R 9. 5.R.9 8.6R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY 0L 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

42 R 9..6R.9.R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-5 - CONTINGENCY L 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

43 R 9..8R.9.6R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-6 - CONTINGENCY 9L 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

44 R 9..8R.9.R ALPAC R.0. 9 ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A- - CONTINGENCY L 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

45 R 9. 5.R.9 8.0R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE A-8 - CONTINGENCY 88L 06 WP PRE-CONNECTION TUE, OCT : kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000

46 : FortisAlberta Inc. Plamondon 5S Capacity Increase Attachment B: Post-Connection Power Flow Analysis Results AESO Project Number: P60 March, 06

47 R R R ALPAC R ALPAC FLATLK WAUP PLAMOND ST THOMP N BARRH CLYDE PLAMOND LAC LA N CALDE 50 WHITBY Project 60 Plamondon 5S - Capacity Increase FIGURE B- - SYSTEM NORMAL 06 SP POST-CONNECTION TUE, OCT :5 kv: <=5.000 <=.500 <= <=8.000 <=0.000 >0.000