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Market Operations Presentation Board of Director’s Meeting December 13, 2005

Market Operations Presentation Board of Director’s Meeting December 13, 2005. Agenda. Retail Activity. Overall Activity Migration From Native AREPs Performance Measures (Quarter Only) Capacity Services Energy Services including Summary Hub Price Data Congestion Services

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Market Operations Presentation Board of Director’s Meeting December 13, 2005

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  1. Market Operations Presentation Board of Director’s Meeting December 13, 2005

  2. Agenda Retail Activity • Overall Activity • Migration From Native AREPs • Performance Measures (Quarter Only) • Capacity Services • Energy Services including Summary Hub Price Data • Congestion Services • REPs and QSEs Added/Deleted Wholesale Activity Other Items

  3. Retail Transactions Summary since June 1, 2001 As of Monday, October 31, 2005 Transaction Type Switches 2,198,367 Move - Ins 7,694,199 Move Out 4,425,719 CSA 1,292,948 Drop to POLR 306,867 Total 15,918,100 Compared to Last Month 400,092 Overall Activity

  4. Migration from Native AREP % of Load * % of ESI IDs Residential Small Non-Residential Large Non-Residential at 10-31-05 at 10-31-05 at 10-31-04 35% 80% 74% 28% 31% 73% 19% 23% 63% * % of Peak Demand on 08-03-04

  5. October YTD ($'s in millions) ($'s in millions) 10/31/05 10/31/04 2005 2004 Market Perspective: • Approximate Retail Market $25,421.7 24,600.7 2,367.5 2,440.6 (at $.10/kWh PTB) Volume (GWh) 254,217 246,007 23,675 24,406 % Increase 3.3% -3.0% Natural Gas Price Index ($/MMBTU) 7.9 5.7 11.4 6.1 % Increase 38.6% 86.9% Other Capacity Services: • Replacement Reserve 0.0 0.0 0.0 0.0 Reg Up and Down 138.6 47.9 27.3 10.4 Responsive (Spinning) Reserve 135.7 46.8 15.7 7.9 Non-Spinning Reserve 37.7 5.8 4.8 1.6 Black Start 5.8 6.1 0.6 0.6 TOTAL CAPACITY SERVICES $397.6 211.4 56.3 30.6 Capacity Services

  6. YTD October 10/31/05 10/31/04 2005 2004 Reg Up: Required (MW) 5,484,372 6,324,005 619,934 665,938 Self Arranged (MW) 2,379,264 4,200,471 253,450 371,613 Procured (MW) 3,119,282 2,133,128 367,735 295,227 Weighted Avg MCPC ($/MW) 21.0 12.0 17.0 33.0 % Procured 57% 34% 59% 47% Reg Down: Required (MW) 6,287,884 6,690,857 680,493 665,938 Self Arranged (MW) 2,865,102 4,605,012 278,915 371,329 Procured (MW) 3,433,275 2,095,068 401,578 294,609 WeightedAvg MCPC ($/MW) 21.4 10.7 37.4 19.0 % Procured 38% 31% 59% 44% Responsive (Spinning) Reserve: Required (MW) 16,710,921 16,825,951 1,711,854 1,712,955 Self Arranged (MW) 8,783,803 11,000,091 919,913 989,206 Procured (MW) 7,991,853 5,833,549 793,586 724,294 WeightedAvg MCPC ($/MW) 17.0 8.0 19.7 10.9 % Procured 48% 35% 46% 42% Responsive (Non Spinning) Reserve: Required (MW) 2,414,030 2,617,337 435,878 464,555 Self Arranged (MW) 962,414 1,904,602 173,114 294,043 Procured (MW) 1,447,500 710,630 261,886 169,707 WeightedAvg MCPC ($/MW) 26.1 8.1 18.3 9.0 % Procured 60% 27% 60% 37% Capacity Services – Reg Up and Down and Responsive Reserve

  7. October YTD ($'s in millions) ($'s in millions) 10/31/05 10/31/04 2005 2004 Market Perspective: • Approximate Retail Market $25,421.7 24,600.7 2,367.5 2,440.6 (at $.10/kWh PTB) Volume (GWh) 254,217 246,007 23,675 24,406 % Increase 3.3% -3.0% Natural Gas Price Index ($/MMBTU) 7.9 5.7 11.4 6.1 % Increase 38.6% 86.9% Balancing Energy: • Balancing Energy - Up $935.7 394.0 143.7 59.3 % Increase 137.5% 142.3% Up (GWh) 10,256.1 8,079.8 1,010.7 992.0 % Increase 26.9% 1.9% % of Market 4.0% 3.3% 4.3% 4.1% Balancing Energy - Down -$234.5 -266.1 -36.1 -21.6 % Increase -11.9% 67.1% Down (GWh) -4,442.9 -5,827.2 -477.5 -366.7 % Increase -23.8% 30.2% % of Market 1.7% 2.4% 2.0% 1.5% Energy Services

  8. Hub Summary Data • ERCOT Hubs Weighted Average Price ($/MWH) October 2005 June 2005 August 2005 July 2005 September 2005 May 2005 HUB $62.27 $58.27 $114.96 South $84.76 $77.03 $104.55 $75.23 $60.77 $117.39 North $81.62 $106.76 $121.40 $80.92 $67.43 Houston $143.31 $87.38 $115.75 $125.73 $80.11 $68.90 $128.08 West $121.16 $92.23 $130.39 $73.43 $62.80 $121.75 ERCOT Hub $103.10 $83.24 $117.74 $74.46 $62.69 $123.09 ERCOT Bus $105.09 $83.26 $119.27 18.8% 3.2% % Change - Bus 26.2% 11.8% 13.5% 12.6% 5.5% 21.3% NGPI % Change 18.7% 3.9%

  9. October YTD ($'s in millions) ($'s in millions) 10/31/05 10/31/04 2005 2004 • Market Perspective: Approximate Retail Market $25,421.7 24,600.7 2,367.5 2,440.6 (at $.10/kWh PTB) Volume (GWh) 254,217 246,007 23,675 24,406 % Increase 3.3% -3.0% Natural Gas Price Index ($/MMBTU) 7.9 5.7 11.4 6.1 % Increase 38.6% 86.9% Local Congestion: • OOMC 60.2 74.4 12.0 4.1 OOME - Down 41.2 50.9 3.8 5.4 OOME - Up 18.1 16.9 1.4 0.6 Total Local Congestion Costs $119.5 $142.2 $17.2 $10.1 Zonal Congestion: • TCR Auction Revenue from TCR Holders 32.9 30.0 3.2 2.5 Direct Assignment Revenue Paid by QSEs based on schedules 74.8 25.0 22.4 2.2 TCR/PCR Payments including Auction Revenue Refunds (111.8) (31.2) (26.8) (3.6) Net Under (Over) Sold TCRs ($4.1) $23.8 ($1.2) $1.1 RMR: • RMR Capacity and Start Up 38.6 37.2 4.3 4.4 RMR Energy 197.9 232.5 32.9 27.3 BENA Credit -156.7 -164.9 -29.3 -21.6 Net RMR 79.8 104.8 7.9 10.1 Congestion Services

  10. REPs and QSEs Added/Deleted • Added QSEs • Added Reps • None • Eagle Energy Partners I, LP • Mirant Energy Trading, LLC • Dynowatt, LP • Deleted Reps • Deleted QSEs • None • None

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