impact of nprr 520 (sced cct)
DESCRIPTION
Impact of NPRR 520 (SCED CCT). Market Analysis ERCOT. Background of NPRR 520 (SCED CCT). Why Change? SCED over-mitigation issues What Changed? No Monthly and Daily Constraint Competitiveness Test (CCT) SCED CCT runs every 5 minutes (or whenever SCED is executed) - PowerPoint PPT PresentationTRANSCRIPT
Sep 4, 2013
Impact of NPRR 520 Impact of NPRR 520 (SCED CCT)(SCED CCT)
Market AnalysisERCOT
Background of NPRR 520 (SCED CCT)
Why Change?Why Change? SCED over-mitigation issues
What Changed?What Changed? No Monthly and Daily Constraint Competitiveness Test (CCT) SCED CCT runs every 5 minutes (or whenever SCED is
executed) Less set of Resources get mitigated Minimizing unnecessary Base Point oscillations/QSGR dispatch
System Lambda Increase
Mitigation Ratio
Increased Peaker Net Margin (PNM)
Pivotal Players For Each Active Constraint (7/1-7/30) (Continued)
Pivotal Players For Each Active Constraint (7/1-7/30) (Continued)
Top 10 Non-Competitive Constraints
Constraints with Both Competitiveness Status (7/1-7/30)
CONTINGENCONTINGENCY_NAMECY_NAME
CONSTRCONSTR_NAME_NAME
FROM_SFROM_STATIONTATION
TO_STTO_STATIONATION
FROM_SFROM_STA_KVTA_KV
TO_STTO_STA_KVA_KV
CCT_SCCT_STATUSTATUS
CompetitivCompetitive_Freqe_Freq
NonCompetitNonCompetitive_Freqive_Freq
DENTSCS5 1170__A NCDSE HNRSW 138 138COMP 29 6
DGIBSNG5 240__A JEWET SNG 345 345COMP 26 29
DGIBSNG5 260_A_1 JEWET SNG 345 345COMP 77 18
DJEWSNG5 JK_TOKSW_1 TOKSW JK_CK 345 345COMP 325 30
DNAVWTR5 35040__A NAVARRO VENSW 345 345COMP 2 8
DTB_SNG5 SNGZEN99_A SNG ZEN 345 345COMP 6 926
Summary of Impact of NPRR 520
Average number of mitigated resources for each SCED interval:
Old: 100% vs. New: 4.8% Average system lambda increase: $0.2/MWh for 744 hours. Cumulative PNM increase: $80.63/MW. Total number of non-competitive constraints: Old: ~100% vs. New: 95%
Next Step
•Shall we use HDL instead of HSL for CCT calculation?
•Shall we include all online Resources’ LDL as base load?
•Shall we use sf*HSL instead of sf*sf*HSL for ECI calculation?
Thanks!Thanks!