7 Cost Allocation Metrics
Bid Cost Recovery
Figure 14 shows the allocation of bid cost recovery payment in the IFM, residual unit commitment (RUC) and RTM markets. The total bid cost recovery for March jumped to $43.19 million from $18.73 million in February. Out of the total monthly bid cost recovery payment for the three markets in March, the IFM market contributed 3 percent, RTM contributed 75 percent, and RUC contributed 22 percent of the total bid cost recovery payment. The elevated RTM bid cost recovery payments from March 16 to March 31 will be corrected in a future settlement cycle.
Figure 14: Bid Cost Recovery Allocation by Market
Figure 15 shows daily BCR allocation across the IFM, RUC and RTM markets by local capacity requirement area (LCR). Figure 16 shows monthly BCR allocation in each of the IFM, RUC and RTM markets by LCR.
Figure 15: Bid Cost Recovery Allocation by LCR
Figure 16: Monthly Bid Cost Recovery Allocation by LCR and Market
Figure 17 shows daily BCR allocation across the IFM, RUC and RTM markets by utility distribution company (UDC). Figure 18 shows monthly BCR allocation in each of the IFM, RUC and RTM markets by UDC.
Figure 17: Bid Cost Recovery Allocation by UDC
Figure 18: Monthly Bid Cost Recovery Allocation by UDC and Market
Cost in Residual Unit Commitment
Figure 19 shows the daily bid cost recovery allocation in RUC by cost component: Bid Cost (BID_COST), Minimum Load Cost (MLC), Startup Cost (SUC), and Transition Cost (TC). Figure 20 shows daily BCR allocation in RUC by LCR. Figure 21 shows monthly BCR allocation in RUC by cost components and LCR. Figure 22 shows daily BCR allocation in RUC by UDC. Figure 23 shows monthly BCR allocation in RUC by cost components and UDC.
Figure 19: BCR Allocation in RUC by Cost Component
Figure 20: BCR Allocation in RUC by LCR
Figure 21: Monthly BCR Allocation in RUC by LCR and Cost Component
Figure 22: BCR Allocation in RUC by UDC
Figure 23: Monthly BCR Allocation in RUC by UDC and Cost Component
Cost in Real-Time
Figure 24 shows the daily bid cost recovery allocation in Real-Time (RT) by cost component: Ancillary Service (AS and AS_MILEAGE), Minimum Load Cost (MLC), Pumping Cost (PUMP), Energy (RT_ENERGY), Shutdown Cost (SDC), Startup cost (SUC) and Transition Cost (TC). Figure 25 shows daily BCR allocation in RT by LCR. Figure 26 shows monthly BCR allocation in RT by cost components and LCR. Figure 27 shows daily BCR allocation in RT by UDC. Figure 28 shows monthly BCR allocation in RT by cost components and UDC.
Figure 24: BCR Allocation in RT by Cost Component
Figure 25: BCR Allocation in RT by LCR
Figure 26: Monthly BCR Allocation in RT by LCR and Cost Component
Figure 27: BCR Allocation in RT by UDC
Figure 28: Monthly BCR Allocation in RT by UDC and Cost Component
Cost in Intergrated Forward Market
Figure 29 shows the daily bid cost recovery allocation in IFM by cost component: Ancillary Service (AS), Bid Cost (BID_COST), Pump Cost (PUMP), Minimum Load Cost (MLC), Startup Cost (SUC), and Transition Cost (TC). Figure 30 shows daily BCR allocation in IFM by LCR. Figure 31 shows monthly BCR allocation in IFM by cost components and LCR. Figure 32 shows daily BCR allocation in IFM by UDC. Figure 33 shows monthly BCR allocation in IFM by cost components and UDC.
Figure 29: BCR Allocation in IFM by Cost Component
Figure 30: BCR Allocation in IFM by LCR
Figure 31: Monthly BCR Allocation in IFM by LCR and Cost Component
Figure 32: BCR Allocation in IFM by UDC
Figure 33: Monthly BCR Allocation in IFM by UDC and Cost Component
Real-Time Imbalance Offset Costs
Real-time imbalance offset costs consist of three elements, namely: the real-time congestion offset, real-time loss offset and the real-time energy offset.
The real-time imbalance congestion offset charge (RTICO) is defined as the real-time congestion fund net of the real-time congestion credit calculated as provided in tariff section 11.5.4. In other words, the real-time congestion offset amount is the difference between the total congestion revenue collected from the real-time market and the total congestion revenue paid out in the real-time market for both energy and ancillary services. The real-time market includes both the hour-ahead scheduling process (HASP) and RTD market. The real-time congestion offset (CC 6774) is allocated to all scheduling coordinators based on measured demand, excluding demand associated with existing transmission rights (ETC), transmission ownership rights (TOR) or converted rights (CVR) self-schedules for which IFM and RTM congestion credits were provided.
The real-time loss offset is the difference between loss revenue collected in the real-time market and the loss revenue paid out in the real-time market. This real-time loss offset is allocated to all scheduling coordinators based on measured demand, excluding demand associated with TOR self-schedules. The imbalance loss offset is captured as part of the imbalance energy offset.
The real-time imbalance energy offset (RTIEO) is a residual calculation. The settlement amounts for the instructed imbalance energy (IIE), uninstructed imbalance energy (UIE), and unaccounted for energy (UFE) are summed up; this value represents the real-time imbalance revenue. The real-time congestion offset and the real-time loss offset are both subtracted from the real-time imbalance revenue; and the resultant residual value is known as the RTEIO. The RTIEO is allocated to all scheduling coordinators based on a pro-rata share of their measured demand, excluding demand quantity for the valid and balanced portion of TOR contracts and self-schedules in real-time. The real-time imbalance energy offset allocation is the same as the real-time loss offset allocation.
The imbalance offset amounts can either be a net charge or a net payment to demand. Since the implementation of the new market, the imbalance offset amount has been a charge to measured demand. This settlement amount is mainly driven by the price divergence between the FMM and the RTD market and the use of average hourly price for the RT demand imbalance energy settlement.
Figure 34 shows the daily RTIEO and RTICO for CAISO. A positive value indicates a charge to measured demand and a negative value indicates a payment to measured demand. RTIEO rose to $5.40 million in March from $3.25 million in February. RTICO in March jumped to $22.63 million from $11.69 million in February.
Figure 34: ISO RTCO And RTIEO
Exceptional Dispatch Uplift Costs
Figure 35 shows the daily exceptional dispatch uplift payments which include the sum of the charge codes 6482, 6488, and 6470. The monthly uplift payments in March fell to -$0.08 million from $0.74 million in February.
Figure 35: Daily Exceptional Dispatch Uplift Costs
