Abstract:A pilot protection method that uses the forward and backward voltage travelling waves to identify DC line faults is proposed in this paper. This method is based on the idea that under internal faults forward and backward travelling waves are observed at both sides of the line within a specific time period. However, under external faults and depending on their direction, backward voltage travelling wave is not observed at one of the terminals. Therefore, a transient-based criterion based on simultaneous existen… Show more
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