As a result of MISO’s response to FERC Docket No. EL23-46-000, the system-wide UCAP/ISAC conversion ratio will be updated. This ratio is used to determine Schedule 53 resource’s Seasonal Accredited Capacity (SAC).
The following ratios will be used for the upcoming 23-24 Planning Year:
Below is a comparison to the previous calculated ratio:
The drivers for the ratio changes include:
· Reflecting the restoration of inadvertently lost Generator Planned Outage (“Outage”) exemptions
· Incorporating fulfilled GVTC test extensions for resources not included in the original Dec 15 ratio
· Refreshing the list of resources qualifying for Schedule 53
MISO plans on updating Schedule 53 SAC values in the MECT by COB Friday, March 31.
The following ratios will be used for the upcoming 23-24 Planning Year:
| Season | Ratio |
| Summer | 1.049 |
| Fall | 1.078 |
| Winter | 1.059 |
| Spring | 1.087 |
Below is a comparison to the previous calculated ratio:
| Season | 3-28-23 Ratio | 12-15-22 Ratio | Delta |
| Summer | 1.049 | 1.074 | -0.03 |
| Fall | 1.078 | 1.182 | -0.10 |
| Winter | 1.059 | 1.099 | -0.04 |
| Spring | 1.087 | 1.166 | -0.08 |
The drivers for the ratio changes include:
· Reflecting the restoration of inadvertently lost Generator Planned Outage (“Outage”) exemptions
· Incorporating fulfilled GVTC test extensions for resources not included in the original Dec 15 ratio
· Refreshing the list of resources qualifying for Schedule 53
MISO plans on updating Schedule 53 SAC values in the MECT by COB Friday, March 31.