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Remote backup protection is installed at the ends of the power line of 35–220 kV and provides detection of short-circuit on the low-voltage side of branch transformers. To support remote protection on 110 kV lines and above with two or multi-way power feed, it is mandatory to implement a three-stage remote protection from interphase short-circuit (phase-to-phase fault). To implement line protection...
Protection for single-phase high-resistance ground faults is a long term concern in the field of relay protection. Because characteristic of single-phase high-resistance ground faults is unobvious, the traditional distance protection can't deal with it. Meanwhile adaptive distance protection uses memory values so that it only has ability of instantaneously tripping and can't become the backup protection...
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