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 |
|---|---|---|
| PGAE | October 9-27 | Q0577SS-LOSBANOS-230 kV line |
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 |
|---|---|---|
| PGAE | October 1-26 | Q0577SS-LOSBANOS-230 kV line, LOSBANOS-GATES1-500 kV line, GATES1-MIDWAY-500kV line, GATES-MIDWAY-230 kV line |
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 0.33 percent in October from 1.41 percent in September. The cumulative frequency of negative prices rose to 0.47 percent in October from 0.02 percent in September.
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 |
|---|---|---|
| PGAE | October 1-26 | Q0577SS-LOSBANOS-230 kV line, LOSBANOS-GATES1-500 kV line, GATES1-MIDWAY-500kV line, GATES-MIDWAY-230 kV line |
| SDGE | October 18 | OMS-10731240_TL23054_NG, 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 RTD. The cumulative frequency of prices above $250/MWh fell to 0.16 percent in October from 0.66 percent in September. The cumulative frequency of negative prices increased to 1.99 percent in October from 0.42 percent in September.
Figure 6: Daily Frequency of RTD LAP Positive Price Spikes and Negative Prices
