Misoperations are a key risk
facing the Bulk Power System, and remain an area of focus in the
industry. Misoperations are defined as “the failure of a Composite
Protection System to operate as intended for protection purposes.”
Misoperations include a Protection System’s failure to operate, slowness in
operating, or operating when not required during either a fault or non-fault
condition.
Misoperations contribute to, and
tend to exacerbate the impact of, automatic transmission outages, which
adversely affect the reliability of the BES.
Misoperations are a key risk facing the Bulk Power System, and remain an area
of focus in the industry. Included below are several ReliabilityFirst
Misoperations Analysis documents, which provide summaries of Protection System
issues, details and corrective actions associated with those issues, and
lessons learned.
Misoperation Rate by Region and NERC by Year
*NERC 2019 State of Reliability Report
