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. On July 12 and 29-30, all four DLAP LMPs were elevated due to high demand driven by high temperatures.
Figure 2: Day-Ahead Simple Average LAP Prices (All Hours)
| DLAP | Dates | Transmission Constraint |
|---|---|---|
| SDGE | July 20 | EL-CAJON-LOSCOCHS 69kV line |
| PGAE | July 21-22 | MIDWAY-VINCENT 500 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 July 9, all four DLAP LMPs spiked due to upward load adjustment and net import reduction.
Figure 3: FMM Simple Average LAP Prices (All Hours)
| DLAP | Dates | Transmission Constraint |
|---|---|---|
| PGAE | July 10 | ML_RM12 |
| SCE, SDGE, VEA | July 21 | MIDWAY-VINCENT 500 kV line, 6410_CP1_NG |
| PGAE | July 29-30 | 7430_CP6_NG, MUSTANGS-GATES 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 increased to 1.59 percent in July from 0.18 percent in June. The cumulative frequency of negative prices slid to 0.07 percent in July from 0.89 percent in June.
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. July 9 saw price spikes for all four DLAP LMPs due to upward load adjustment and net import reduction.
Figure 5: RTD Simple Average LAP Prices (All Hours)
| DLAP | Dates | Transmission Constraint |
|---|---|---|
| PGAE | July 10 | ML_RM12, MUSTANGS-GATES 230 kV line |
| SCE, SDGE, VEA | July 21 | 6410_CP1_NG |
| PGAE | July 29-30 | 7430_CP6_NG, MUSTANGS-GATES 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 RTD. The cumulative frequency of prices above $250/MWh inched up to 0.78 percent in July from 0.35 percent in June. The cumulative frequency of negative prices fell to 0.10 percent in July from 1.78 percent in June.
Figure 6: Daily Frequency of RTD LAP Positive Price Spikes and Negative Prices
