Fault Segment Location for MV Distribution System Based on the Characteristic Voltage of LV Side

The voltage and current measurement of the medium-voltage (MV) side are used for traditional fault location method, which leads to a high installation cost complicated post-operational maintenance work. A method is proposed based on distributed at low-voltage (LV) side. On analysis distribution rules influence transformer transmission, obvious differences found in variation (phase sequence voltage) LV different faults—specifically, detection sensitivity faults varies. Therefore, MV network characteristic proposed. Firstly, selected adaptively according type. suspected path then determined by amplitude measuring points. Finally, segment located via each segment. This can be applied combination with widely equipment such as power consumption information acquisition system intelligent fusion terminal acquire without adding new devices. difference accurate finding, an economical practical idea network. correctness effectiveness were verified simulation IEEE 34 built PSCAD/EMTDC real