SynchroGrid performed a WAC as part of NERC PRC-027-1 requirement 2. The process included verifying proper relay operation and coordination of distance and overcurrent elements. Coordination criteria included Zone 1, Zone 2, Zone 3, and Zone 4 reaches, out of sequence, out of order operations, and CTI mis-coordination. As a part of this project, SynchroGrid also evaluated Switch-Onto-Fault (SOTF), Loss of Potential (LOP) and load encroachment settings.

Reach verifications and coordination checks were made using ASPEN’s PowerScript language.

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