3 Market Performance Metrics
Day-Ahead Prices
Figure 2 show the daily simple average load-aggregation points (LAP) prices for each of the four default LAPs (PG&E, SCE, SDG&E, and VEA) for all hours. Table 2 below lists the binding constraints along with the associated DLAP locations and the dates when the binding constraints resulted in relatively high or low DLAP prices.
Figure 2: Day-Ahead Simple Average LAP Prices (All Hours)
| DLAP | Dates | Transmission Constraint |
|---|---|---|
| SDGE | December 1-4, 6-11, 13, 16-19 | MIGUEL_BKs_MXFLW_NG |
Real-Time Price
Figure 3 show daily simple average LAP prices for all the default LAPs (PG&E, SCE, SDG&E, and VEA) for all hours respectively in FMM. Table 3 lists the binding constraints along with the associated DLAP locations and the dates when the binding constraints resulted in relatively high or low DLAP prices.
Figure 3: FMM Simple Average LAP Prices (All Hours)
| DLAP | Dates | Transmission Constraint |
|---|---|---|
| SDGE | December 1 | MIGUEL_BKs_MXFLW_NG, OMS-10827054_TL50003_NG |
| SDGE | December 2-4, 6, 8, 10-11, 13 | MIGUEL_BKs_MXFLW_NG |
| SDGE | December 15-16 | 7820_TL 230S_OVERLOAD_NG |
Figure 4 below shows the daily frequency of positive price spikes and negative prices by price range for the default LAPs in the FMM. The cumulative frequency of prices above $250/MWh decreased to 0.10 percent in December from 0.22 percent in November. The cumulative frequency of negative prices edged up to 0.57 percent in December from 0.52 percent in November.
Figure 4: Daily Frequency of FMM LAP Positive Price Spikes and Negative Prices
Figure 5 show daily simple average LAP prices for all the default LAPs (PG&E, SCE, SDG&E, and VEA) for all hours respectively in RTD. TABLE 4 lists the binding constraints along with the associated DLAP locations and the dates when the binding constraints resulted in relatively high or low DLAP prices.
Figure 5: RTD Simple Average LAP Prices (All Hours)
| DLAP | Dates | Transmission Constraint |
|---|---|---|
| SDGE | December 1 | MIGUEL_BKs_MXFLW_NG, OMS-10827054_TL50003_NG |
| SDGE | December 2-4, 6, 8, 10-11, 13 | MIGUEL_BKs_MXFLW_NG |
Figure 4 below shows the daily frequency of positive price spikes and negative prices by price range for the default LAPs in RTD. The cumulative frequency of prices above $250/MWh edged down to 0.21 percent in December from 0.24 percent in November. The cumulative frequency of negative prices slipped to 1.41 percent in December from 1.60 percent in November.
Figure 6: Daily Frequency of RTD LAP Positive Price Spikes and Negative Prices
