Rules and Procedures for Determination of Generating Capability

by ronfluegge 28. March 2014 13:44


At the January 23, 2014 meeting of the PJM Markets and Reliability Committee, the following changes were approved to PJM Manual 21, “Rules and Procedures for Determination of Generating Capability”:

           All units must now ambient correct their Seasonal Capacity Verification tests, with the exception of hydro, pumped storage and diesel.

          All hydro and pumped storage units must now do their once per year Capacity Verification test during the Summer test window of June, July or August.

 These changes will be effective for the 2014 Summer test period.

 The Seasonal Capacity Verification tests must use at least one of the ambient corrections, dry bulb air temperature, relative humidity or cooling water. Any unit not complying with these changes will be considered 100% forced out for the entire season.

 If you have any questions or concerns, please contact one of the PJM GADS Administrators at

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