Identification Method for Single-line-to-ground Faults with Line Break Based on Phasor Measurement in Distribution Networks

The single-line-to-ground faults with line breaks (SLGFs-LBs) occur more and frequently in distribution networks can cause major safety accidents. It is difficult to distinguish the (SLGFs) resonant grounding systems ungrounding due same electrical characteristics on source side uncertain operation conditions of networks. This paper proposes a method for distinguishing SLGFs-LBs SLGFs. First, source-side load-side voltage SLGFs are analyzed, phase difference between voltages fault non-fault load selected as identification criterion. Phasor measurement units (PMUs) measuring devices. Then, effects external devices proposed discussed, errors caused by them calculated correct method. Finally, field testing simulation experiments conducted verify effectiveness robustness