Study on Section Location of Medium Voltage Distribution Network Based on Fifth Harmonic Current Fault Component

摘要

Neutral small current grounding in this way more by the use of China's medium voltage distribution network, but this system occurs single-phase ground fault section of the problem has not been satisfactorily resolved, so for such a ground fault is necessary to carry out adequate research. In this paper, a typical medium voltage distribution network model is established by using PSCAD. The differences of the fifth harmonic current fault components on both sides before and after the fault are analyzed, and the fault location method based on the fifth harmonic current fault component is proposed. The principle of the method is simple and easy to understand, less data required, which is good for hardware implementation.