New Time-Domain Line Protection Principles and Implementation

Since electric power’s earliest days, engineers have continually improved protection as measured by safety, speed, security, and dependability. The quest for faster fault clearing is more relevant today than ever. This paper reviews new time-domain line protection operating principles using traveling waves and incremental quantities. We discuss operating principles of novel directional and differential elements based on traveling waves and Zone 1 distance and directional elements based on incremental quantities. This paper provides details on the actual implementation of these principles in a highperformance relay platform and shares performance results from simulations and field recordings.

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