Remedial Action Scheme

A pre-planned operational scheme that responds to specific contingencies to preserve system reliability.

Definition by PJM

Source: ¹ (p25, Revision 68)

Under normal operating conditions, PJM's EMS will perform an N-1 contingency analysis for the loss of each Bulk Electric System line and transformer within the PJM RTO. PJM will then control as indicated in Manual-03 Section 3: Thermal Operating Criteria.

When PJM EMS indicates that a simulated N-1 contingency will result in an overload on a facility that can be mitigated by a Remedial Action Scheme (RAS) that has been documented as a PJM operational procedure, the following actions should be taken: (omitted here for brevity)

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Last modified: 2025-06-22

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1. PJM (2025). Manuals M-3: Transmission Operations (Revision 68). https://www.pjm.com/-/media/DotCom/documents/manuals/archive/m03/m03v68-transmission-operations-05-21-2025.pdf ↩