1 / 10

NEMA/Boston Congestion Mitigation Study

NEMA/Boston Congestion Mitigation Study. NEPOOL Reliability Committee Presentation August 16, 2000. Presented by: Charles Salamone (NSTAR) Hantz Pr é sum é (NSTAR) Study Participants: William Therriault (ISO-NE) Melissa Scott (NSTAR) Steven Masse (NSTAR)

roanna-cox
Download Presentation

NEMA/Boston Congestion Mitigation Study

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NEMA/Boston Congestion Mitigation Study NEPOOL Reliability Committee Presentation August 16, 2000 Presented by: Charles Salamone (NSTAR) Hantz Présumé (NSTAR) Study Participants: William Therriault (ISO-NE) Melissa Scott (NSTAR) Steven Masse (NSTAR) John Martin (National Grid USA) Wayne Coste (IREMM for ISO-NE)

  2. $76 Million uplift in NEMA/Boston fromSeptember 1, 1999 to June 30, 2000 NEMA/Boston uplift approximately 50% of NEPOOL total Evaluate Near-Term transmission alternatives that increase import capability into NEMA/Boston to mitigate congestion costs Evaluate Near-Term transmission upgrades to mitigate Out-of-Merit generation for voltage control Introduction 2

  3. Small Generators NEMA/Boston Area - 2002 Salem Harbor (PG&E Gen) 1, 2, 3, 4 Mystic (Sithe) 4, 5, 6 & 7 NEMA/Boston Interface Kendall (Southern) L = 5300 G = 3200 Downtown New Boston (Sithe) 1 & 2 Firm Import Capability 3,500 MW 3

  4. ISO Congestion Management Proposal (CMS/MSS) toFERC (March 31, 2000) for NEMA upgrades Joint effort between TO’s and ISO-NE Identify upgrades by September 2000 Perform Benefit to Cost Analysis Benefit: Congestion Savings Cost: Capital + Construction Congestion ISO Congestion Estimation Model Implement upgrades by June 2004 Capital cost sharing limit: $35 Million Study Scope 4

  5. Proposed Upgrades 5

  6. Phase 1: 2nd Framingham Auto, 240-601, Merrimack Auto, Dunbarton Tap, Mystic 106 Breaker Phase 2: West Medway Auto, Walpole Auto, 342-507 Phase 3: Waltham Auto, 282-602, 433-507, 274-509, 3rd Waltham PAR Construction Phases 6

  7. NEMA/BOSTON CONGESTION UPGRADES 115kV Upgrades: 282-507 (Waltham-Sudbury) 433-507 (Framingham-Speen St) 342-507 (Speen St-Sudbury) 274-509 (Medway-Sherborn) 230kV Upgrades: 240-601(W.Medway-Framingham) 282-602 (W.Medway-Waltham) Station Upgrades: Waltham Auto 3rd Waltham Phase Shifter 2nd Framingham Auto Walpole Auto Mystic 106 series breaker West Medway Auto 7

  8. Total capital cost of proposed upgrades = $33.5 M Estimated construction congestion cost = $11.1 M Present value of annual capital costs plus construction congestion costs = $49.9 M Present value of annual congestion savings = $144.1 M Benefit / Cost Ratio = 2.9 Break Even Point = 2 years Simple Payback Period = 4.5 years Benefit / Cost Analysis 8

  9. Southern Reinforcement 345kv UG: Canton – Hyde Park 115kv UG: Hyde Park – Dewar Street $122 million, 4+yrs Northern Reinforcement 345kv OH: Scobie - Tewksbury $41 million, 4+yrs Other Alternatives Considered 9

  10. Remaining Study Work Validate savings with proposed new generation Evaluate voltage related congestion Issue Phase I Report 18.4 approval of proposed upgrades Confirm upgrade proposal compatible with proposed new generator interconnections 15.5 approval of proposed upgrades Equipment procurement: 2001 NSTAR and Northeast Utilities Begin construction: 2002 Future work will examine further congestion reductions Next Steps 10

More Related