Resilience Resonates in Planning Committee


Resilience and what it will look like in the future of PJM System planning continued to be the focus of the Planning Committee meeting on Aug. 10.

Mark Sims, manager – Transmission Planning, presented the latest in the ongoing grid resilience in system planning effort.

Working toward achieving excellence in resilience is an industry-wide concept and PJM is exchanging an overview of its efforts with other grid operators along with discussions with them.

PJM’s resilience criteria for Planning covers a range of possibilities – not triggering new problems, incorporating resilience as a factor in proposal selections for the Regional Transmission Expansion Plan and addressing resilience as a stand-alone baseline driver.

Sims called the work PJM is doing now the “building blocks of resilience,” as Planning develops metrics. Once PJM calculates those metrics, it can move to developing standards and criteria. “Once we have metrics, we will determine how to use them,” said Sims.

Steve Herling, vice president – Planning, pointed out that resilience in a PJM-wide initiative, encompassing a broader range of issues than planning – operations, information technology, markets and physical security. There will be a deeper dive into these issues as PJM works with stakeholders and industry partners to refine what resilience means.

Sims also reviewed the continuing updates to the Light Load Reliability Test parameters. He said PJM’s goal is to revise the input assumptions to be more consistent with high-voltage system alarms and other conditions that affect actual operations.

The updates draw on three years of historic high-voltage alarm data to define light load by zone, taking load level, generation dispatch by fuel type and interchange into consideration. High-voltage alarms occur when the voltage limit of transmission line is exceeded.

Stakeholders endorsed changes to PJM Manual 14B: PJM Regional Transmission Process, reflecting modeling simulations resulting from the NYSIO/PJM wheel cancellation, clarification of the capacity import limits calculation method (applying to all zones in the CIL test, not just New York) and updates to System Planning department responsibilities. Members with questions or comments should send them to as soon as possible.

Other Committee Business