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NPRR385 QMWG Discussions Points

NPRR385 QMWG Discussions Points. Issues. Issue 1: Resources asked to stay online by ERCOT for capacity issue at LSL at negative price Issue 2: Resources with low ramp rate at LDL at negative price due to Forced Outage

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NPRR385 QMWG Discussions Points

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  1. NPRR385 QMWG Discussions Points

  2. Issues • Issue 1: Resources asked to stay online by ERCOT for capacity issue at LSL at negative price • Issue 2: Resources with low ramp rate at LDL at negative price due to Forced Outage • Issue 3: Resources with low ramp rate at LDL at negative price due to Planned Outage

  3. Settlement Impacts in 2011 Figure 1 shows that 62 % ( $28.9M/$46.6M) of the charges associated with negative prices at Resource Nodes with a RTSPP less that -$250/MWH for the period 1/2011 through 11/2011 were incurred by the Coal and Lignite Generation (CLIG) Resource types. The remaining 38% of these charges were incurred by Generation Resource types with more operational flexible regarding continued operation under this pricing regime. 

  4. Impacts by Resource Facility in 2011 Figure 2 shows the distribution of these charges among the CLIG Resources. 94% of the charges were applied to 4 resource facilities with 73% of these charges applied to just 2 of the 4 resource facilities (herein resource facility refers to multi-unit generation sites). These 4 facilities are represented by 3 QSEs responsible respectively for facility No. 1, facility No. 5 and facility Numbers 3 and 8.

  5. Monthly Frequency of Occurrence in 2011 While the cumulative average charge is $4.2 M per month over the study period, Figure 3 shows that 95% of these charges occur in the 4 months of February, May, September and November and 5% of the charges occur in the remaining 7 months including 3 months during which no charges were incurred.

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