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10/15/2013 | Westborough, MA

10/15/2013 | Westborough, MA. Load Power Factor Audit - 2012/2013 and Area Load Power Factor Standards revised for 2014. Osman Bileya. Lead Engineer, Real Time SUPPORT. Presentation to the Reliability Committee - 2013. Review of the Annual Load Power Factor (LPF) Correction process

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10/15/2013 | Westborough, MA

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  1. 10/15/2013 | Westborough, MA Load Power Factor Audit - 2012/2013and Area Load Power Factor Standards revised for 2014 Osman Bileya Lead Engineer, Real Time SUPPORT

  2. Presentation to the Reliability Committee - 2013 • Review of the Annual Load Power Factor (LPF) Correction process • Review the LPF Survey Results for the 2012/2013 Audit period • Present Updated 2014 LPF Standards for six Areas • Forecast Compliance into the 2014 LPF Audit period

  3. Review of the Annual LPF Correction Program • Eleven LPF Areas are defined in NEPOOL OP17 – Load Power Factor Correction • OP17 and annual LPF audit is managed by the Voltage Task Force (VTF). • Each Area is assessed individually to determine its own reactive needs. • Voltage/Reactive Performance criterion • Net Zero MVAR Interchange criterion

  4. Graphical Representation of the 11 LPF Areas

  5. Reasons for Updating LPF Standards • Changes in area voltage/reactive performance due to transmission changes: • New transmission lines • New bulk transformers • Generation Retirement • Changes in generator reactive capability • Additional static or dynamic reactive compensation • Changes in transfer conditions • Load growth since last Area LPF study • Change of Area definition • Revision of “Testing Criteria” assumptions

  6. Annual Load Power Factor Survey • ISO-NE and VTF are responsible for: • Administering the annual LPF survey • Evaluating and reporting results • Requesting remedial action plans from Market Participants • Every year specific historical hours are selected from the previous year • Each load serving Participant ( as defined in OP17) is tasked with submitting LPF data for the selected historical hours • Participant’s surveyed LPFs are compared to the corresponding Area’s LPF Standard for the specified hours • The degree of noncompliance for each Participant is identified in terms of surplus or shortfall of reactive capability • Changes in the underlying networks (i.e. adding caps) can impact compliance with survey requirements

  7. Example of Load Power Factor Standard and Survey

  8. Annual Load Power Factor Survey • The annual LPF Survey Program accomplishes two goals: • Audit Market Participants’ compliance with the current LPF standards • Forecast Market Participants’ compliance with the new standards if the current standards are revised/updated for any of the reasons specified in the previous slide • OP17 program cited by NERC as an Example of Excellence.

  9. 2012/2013 Load Power Factor Survey Results • Eighty one participants submitted LPF audit data for six loads points identified by ISO New England: • Spring Light load (9,128 MW) • Summer Intermediate load (21,938 MW) • Summer Peak load (25,880 MW) • Fall Light load (9,246 MW) • Winter Intermediate load (18,753 MW) • Winter Peak load (20,775 MW)

  10. Fully Compliant Participants in the 2012/2013 Audit Period • In the 2012/2013 audit period 33 participants were fully compliant: Boston: NSTAR Central Mass/Harriman : Fitchburg Gas & El, Green Mountain Power, Hudson Connecticut area: Groton Utilities, NU, The United Illuminating Co , Mohegan Tribal Utilities Authority Maine: Bangor Hydro New Hampshire: Littleton, PSNH, Unitil Energy Systems Northeast Mass: Ipswich, Littleton, Mass Electric, Middleton, Peabody, Rowley , RMLD Rhode Island: Narragansett, Pascoag Southeast: Mansfield, Middleboro, Norwood, NSTAR SWCT: NU, South NRWLK Electric & Water, Third Taxing Dist-NRWLK Vermont: CVPS, Granite State Electric (GS WEST), NH Electric Coop, VELCO, Green Mountain Power

  11. 2012/2013 LPF Survey Results

  12. 2012/2013 LPF Survey Results Cont’d

  13. 2012/2013 LPF Survey Results Cont’d

  14. 2012/2013 LPF Survey Results Cont’d

  15. Revised Load Power Factor for 2014 • 6 out of the 11 eleven Areas revised LPF Standards for 2014 • Maine • New Hampshire • Northeast Massachusetts • Central Massachusetts / Harriman • Western Massachusetts • Southwest Connecticut

  16. New England load levels modeled in the 2014 LPF Studies

  17. Revised Maine LPF Standard for 2014 The following Maine Power Reliability Program (MPRP) topology upgrades are the reason for the LPF revision for 2014: • 240 MVAR of new reactors, • four new 345/115 kV autotransformers (one replacing the soon to be retired Maxcys T3), • 184 mile long parallel 345 kV aerial transmission path from Orrington to Eliot substation in New Hampshire, • retirement of five special protection systems (SPS), • 100 miles of new 115 kV aerial transmission and various 115 kV transmission improvements

  18. Revised Maine LPF Standard for 2014 Cont’d • The minimum LPF Standards were based on the Net 0-MVAR interchange criterion • Starting with an all lines-in system • Respecting the worst limiting contingency • The maximum LPF Standards were based on high-voltage violation criteria • Starting with a facility out from a light load/high voltage perspective • Respecting the worst limiting contingency

  19. Revised New Hampshire LPF Standard for 2014 • The main reason for this year’s study is the revised “Testing Criteria” for the maximum LPF standards • Facility out as opposed to all lines-in testing during light and shoulder load levels • Only high voltage violations are respected (net 0-MVAR interchange criterion is not respected) • Similar to last year’s study, the following transmission upgrades are included in this year’s study: • the new 345 kV path from New Hampshire to Maine (Elliot to Maguire Road to South Gorham • New Capacitors at Webster and Weare • Up-rate the 326 line to 1780 MVA summer LTE

  20. Revised New Hampshire LPF Standard for 2014 • The minimum LPF Standards were based on the Net 0-MVAR interchange criterion • Starting with an all lines-in system • Respecting the worst limiting contingency • The maximum LPF Standards were based on high-voltage violation criteria • Starting with a facility out from a light load/high voltage perspective • Respecting the worst limiting contingency

  21. Revised Northeast MA LPF Standard for 2014 • The reason for revising NEMA’s LPF standardsis the retirement of Salem Harbor Units 3 & 4 by end of 2014: • Total real power capability is approximately 585 MW • Total lagging/leading reactive power capability is approximately 265 MVAR

  22. Revised Northeast MA LPF Standard for 2014 Cont’d • The minimum LPF Standards were based on the low voltage violation criterion • Starting with an all lines-in system • Respecting the worst limiting contingency • The maximum LPF Standards were based on the high-voltage violation criterion • Starting with a facility out from a light load/high voltage perspective • Respecting the worst limiting contingency

  23. Revised Central MA/Harriman LPF Standard for 2014 Cont’d The following topology upgrades are the reason for the LPF revision for 2014: • Reclosing of A127 and B128 (major change) • Auburn St substation - 2nd 345/115 kV auto transformer (March 2014) • E Main St, Westborough - 2nd 115/13 kV transformer and new in-line breaker (June 2014) • O-15S conversion to 115 kV (Oct 2014)

  24. Revised Central MA / Harriman LPF Standard for 2014 Cont’d • The minimum LPF Standards were based on the Net 0-MVAR interchange criterion • Starting with an all lines-in system • Respecting the worst limiting contingency • The maximum LPF Standards were based on high-voltage violation criteria • Starting with a facility out from a light load/high voltage perspective • Respecting the worst limiting contingency

  25. Revised Western MA LPF Standard for 2014 • The previous LPF standards were evaluated in 2012 and included the Greater Springfield Reliability Project (GSRP) • In addition to the completion of the GSRP project, this year’s study included: • The closing of A127 and B128 (Harriman to Millbury 115 kV) circuits • Addition of the following 115 kV capacitors to the Pittsfield area • 14.4 MVAR Capacitor at Podick • 14.4 MVAR Capacitor at Amherst • 14.4 MVAR Capacitor at Cumberland • Another reason for this year’s study is the revised “Testing Criteria” for the maximum LPF standards • Facility out as opposed to all lines-in testing during light and shoulder load levels • Only high voltage violations are respected (net 0-MVAR interchange criterion is not respected)

  26. Revised Western MA LPF Standard for 2014 Cont’d • The minimum LPF Standards were based on the Net 0-MVAR interchange criterion • Starting with an all lines-in system • Respecting the worst limiting contingency • The maximum LPF Standards were based on high-voltage violation criteria • Starting with a facility out from a light load/high voltage perspective • Respecting the worst limiting contingency

  27. Revised Southwest CT LPF Standard for 2014 The following topology upgrades are the reason for the LPF revision for 2014: • 8300 Line Reconfiguration • East Shore Capacity Upgrade • Union Substation • Addition of Beseck Shunt Reactor • Addition of Stamford – Glenbrook Cable • Addition of South Norwalk Substation • Addition of 345-kV Series Breaker at E. Devon Another reason for this year’s study is the retirement of Norwalk Harbor Units 1 & 2 • Total real power capability is approximately 335 MW • Total Lagging reactive power capability is approximately 100 MVAR • Total Leading reactive power capability is approximately 55 MVAR

  28. Revised Southwest CT LPF Standard for 2014 • The minimum LPF Standards were based on the low voltage violation criterion • Starting with an all lines-in system • Respecting the worst limiting contingency • The maximum LPF Standards were based on high-voltage violation criteria • Starting with a facility out from a light load/high voltage perspective • Respecting the worst limiting contingency

  29. Forecast Compliance • All 11 Areas are compliant (no reactive deficiency) based on the 2014 LPF standards • Note that some Participants within the individual Areas may still be non-compliant, however each area as a whole is compliant.

  30. Improvement in Spring Light load Compliance based on Forecasted LPF Standards

  31. Osman Bileyaobileya@iso-ne.com

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