RAS System

A Real-world Implementation of Centralized RAS System

by J. Wen, P. Arons, E. Lee, Southern California Edison , USA

The Remedial Action Scheme (RAS), also known as Special Protection System (SPS), is an automatic protection system designed to maintain system reliability, which detects abnormal or predetermined system conditions, and takes corrective actions i.e. automated remedial mitigation steps of appropriate load or generation reductions to maintain reliable and safe post-disturbance transmission grid operations, other than (or in addition to) the isolation of faulted components. More

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