A new travelling wave fault-locating algorithm for line-current differential relays

Faults on overhead power lines cause transients that travel at the speed of light and propagate along the line as traveling waves (TWs). This presentation describes a new algorithm for TW fault locating suitable for implementation in line current differential relays. The presentation describes the new algorithm in detail, including filtering, phase and mode selection, time stamping, and compensation for dispersion. The presentation includes a number of actual field cases from a 161-kV transmission line at Bonneville Power Administration.