Research into CIDI ticket #249262 uncovered a single formula discrepancy between the BPM and as-is configuration. The allocation of congestion revenue from Virtual Bid adjustment to EIM BAAs via BAASettlementIntervalTotalRTEnergyCongestionAmount where RTCongRevenueVirtualBidAdjAmount is subtracted is incorrect. The system as configured is adding RTCongRevenueVirtualBidAdjAmount and this is the correct treatment since the adjustment is intended to be a credit to EIM BAA.
The calculation is done in Real Time Congestion Precalc feeds CC 6774 (RT Congestion Offset, only passthrough, and no error exists for CAISO BAA) and then ultimately settled into CC 67740 (RT Cong Offset EIM) for EIM BAAs. For reference, the associated impacted variables and bill determinant names are as follows:
BAASettlementIntervalTotalRTEnergyCongestionAmount (BAA_5M_RT_ENGY_CONG@AMOUNT)
RTCongRevenueVirtualBidAdjAmount (VIRTUAL_BID_5M_RTD_ADJ_CONG_REV@AMOUNT).
Documentation edits only have been made to versions of RT Congestion Precalc Configuration guide as listed above in order match the system configured calculations starting Trade Date 11/1/2021 and beyond.