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 | April 9-15, 17, 27-30 | Q0577SS-LOSBANOS-230 kV line |
| PGAE | April 16 | Q0577SS-LOSBANOS-230 kV line, MIDWAY-VINCENT-500 kV line |
| PGAE, SCE | April 18-21 | DOUBLTTP-FRIARS-138 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. On April 7, all four DLAP LMPs were elevated due to high loads and generation outage.
Figure 3: FMM Simple Average LAP Prices (All Hours)
| DLAP | Dates | Transmission Constraint |
|---|---|---|
| PGAE | April 8 | MIDWAY-VICNENT-500 kV line |
| PGAE | April 9-13, 19-20, 27, 29-30 | Q0577SS-LOSBANOS-230 kV line |
| PGAE | April 14, 15, 22 | Q0577SS-LOSBANOS-230 kV line, MIDWAY-VICNENT-500 kV line |
| PGAE | April 16, 21 | MIDWAY-VICNENT-500 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 increased to 0.35 percent in April from 0.07 percent in March. The cumulative frequency of negative prices inched down to 6.45 percent in April from 7.12 percent in March.
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 | April 8 | MIDWAY-VICNENT-500 kV line |
| PGAE | April 9-13, 18-20, 27, 29-30 | Q0577SS-LOSBANOS-230 kV line |
| PGAE | April 14, 15, 22 | Q0577SS-LOSBANOS-230 kV line, MIDWAY-VICNENT-500 kV line |
| PGAE | April 16, 21 | MIDWAY-VICNENT-500 kV line |
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 0.07 percent in April from 1.28 percent in March. The cumulative frequency of negative prices inched up to 13.21 percent in April from 12.61 percent in March.
Figure 6: Daily Frequency of RTD LAP Positive Price Spikes and Negative Prices
