Abstract
In the field of fault location technology for neutral point non-effectively grounded distribution network, the original radial mode of operation is no longer applicable due to the gradual expansion of the scope of application of loop operation mode. By analyzing the zero-sequence equivalent circuit of closed-loop network, this paper finds out the characteristics of zero-sequence current when single phase-to-ground fault occurs in different sections, and puts forward the location method according to the characteristics. ATP simulation shows that this method is accurate and effective.
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