Reviewing the new IEEE C37.250 Guide for Engineering, Implementation, and Management of System Integrity Protection Schemes

This paper summarizes the IEEE Std C37.250™-2020, “IEEE Guide for Engineering, Implementation, and Management of System Integrity Protection Schemes” (SIPS). SIPS have been widely used to address power system reliability and other power system operating problems. In the recent past, regulatory authorities such as NERC have developed reliability requirements that several types of SIPS, e.g. RAS, UVLS and UFLS, must meet. This new guide is the first that provides a comprehensive collection of the practical concepts and approaches used to engineer, implement, and manage highly dependable and secure SIPS to meet such regulatory reliability requirements. High reliability is critical for SIPS to avoid cascading outages, equipment damage from unanticipated power system conditions beyond equipment emergency ratings, voltage collapse, angular instability, or other system problems beyond clearing of equipment faults. In addition, the Guide outlines design processes and considerations that will facilitate continued SIPS operation, maintenance, and modifications over the life of the scheme.