To: PAC Matters
From: NESCOE (contact: Dorothy Capra)
Re: ISO-NE proposal for changes in Needs Assessments assumptions
Date: June 29, 2022
This memo is in response to ISO-NE’s proposal entitled “Generator Outage and Interface Assumptions for Needs Assessments”, which was presented at the June 15, 2022 Planning Advisory Committee meeting. ISO-NE asked for feedback by June 29, 2022. In its presentation, ISO-NE described a move away from the probabilistic planning assumptions that it has been using for several years to model generators out-of-service in needs assessments. It appears that ISO-NE is planning to return to a methodology more closely resembling the assumption of two generators out-of-service that it used prior to adopting probabilistic methods. In addition, ISO-NE outlined changes to modeling transfers but without detail.