PJM is planning changes to the way it estimates Tier 1 synchronized reserves after SR performance fell far short of expectations during the Sept. 10 heat spike. The RTO wants to make at least some of five proposed changes by the end of the year.

Six sponsors submitted proposals to relieve 15 congested facilities in the “market efficiency” window that closed Sept. 26, officials told the Transmission Expansion Advisory Committee.

PJM has narrowed the list of favored solutions to the Artificial Island stability problems, officials told the Transmission Expansion Advisory Committee.

Capacity imports could clear at lower prices than internal resources under proposed import limits being considered by PJM.

The PJM Board of Managers last week approved $1.2 billion in transmission reliability projects.

The Markets and Reliability Committee heard first reading last week on the following PJM manual changes. Members will be asked to endorse the changes at the MRC’s next meeting.

Members agreed to consider new rules to allow batteries, flywheels and other advanced storage technologies to bid in the capacity market.

PJM should be able to absorb the more than 7,000 MW of capacity imports that cleared in May’s auction for 2016-17, officials said.

A 2010 white paper by the Electric Power Research Institute (EPRI) identified 10 applications for energy storage across the entire electricity supply chain.

Some of the changes PJM is considering in the wake of September's unexpected heat wave include: more conservative reserve calculations, quicker and more granular demand response deployments and optimizing trades with neighboring regions.