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Reliability Assessment of Wallingford Units 2-5

Reliability Assessment of Wallingford Units 2-5. Presentation to NEPOOL Reliability Committee May 6, 2003. Wallingford Units 2-5. Simple cycle combustion turbines (LM 6000) installed end of 2001, beginning of 2002 Located in Wallingford, CT; eastern edge of Greater SWCT

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Reliability Assessment of Wallingford Units 2-5

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  1. Reliability Assessment of Wallingford Units 2-5 Presentation to NEPOOL Reliability Committee May 6, 2003

  2. Wallingford Units 2-5 • Simple cycle combustion turbines (LM 6000) installed end of 2001, beginning of 2002 • Located in Wallingford, CT; eastern edge of Greater SWCT • Total Capacity:165.5 MW (S), 198 MW (W) • Fuel: natural gas

  3. Background for Assessment • Owner: PPL Wallingford Energy LLC • On January 16 owner applied to FERC for Reliability Must Run Cost of Service (RMRCOS) contract to be effective February 1 • Owner submitted 18.4 Application April 1 to ISO for deactivation of Units 2, 3, 4 and 5 effective July 1 • 18.4 Application caused by uncertainties of RMRCOS approval and its effective date

  4. Wallingford Assessment • ISO examined the need for the 4 units using 3 methods for assessing reliability: • Generation Resource Adequacy: LOLE • Transmission/Operating Reserve Adequacy: Day Ahead Unit Commitment (DAUC) • Security Constrained Economic Dispatch (SCED)

  5. Assumptions • 2003 CELT Reference Peak Loads (50/50 Probability) • 2003: 25,120 MW • 2006: 26,290 MW • Import Limits • CT: 2200 MW • SWCT: 2000 MW (2003); 2600 MW (2006) • Milford Power operation uncertain: 490 MW • Long Island 1385 cable in service

  6. LOLE Results

  7. DAUC Results for Connecticut *Millstone 2 & 3

  8. DAUC Results for Greater SWCT * Norwalk Harbor + BEC ** SWCT Phase I 345 kV Line

  9. SCED Results: Greater SWCT *Nor Har 2 + BEC **BPH 3 + BEC

  10. Conclusions • Method showing greatest need for Wallingford units establishes the system need. • 2003 • DAUC and SCED Results: Existing system deficient with Wallingford Units 2-5 • SCED Results: Existing system with Milford Power operating is deficient with Wallingford units • 2006 • DAUC CT Results: Existing system is deficient with Milford

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