Open AccessFault location method for neutral ungrounded system based on C- type travelling wave method
Author(s) -
Haiyan Fan,
Jincheng Qi,
Zhen Sun,
Fayun Zhao,
Ning Guo
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/768/6/062071
Subject(s) - fault (geology) , electrical impedance , point (geometry) , voltage , electronic engineering , electrical engineering , computer science , engineering , acoustics , physics , mathematics , geology , seismology , geometry
In China, the 10kV distribution network operates with neutral ungrounded. Due to the influence of high transition impedance and branches, the problem of fault location has not been effectively solved. The characteristics of C-type travelling wave method at neutral ungrounded system are analyzed in this paper. Multi-point fault location method based on C-type travelling wave method is proposed. By actively injecting high-voltage pulses into the circuit and using multiple measuring devices to detect the reflected wave of the fault point, the effect of high-impedance- grounded and branch points on the reflected wave of the fault point is effectively reduced, and the success rates of reflected wave detection of the fault point are improved. The validity of the method is verified by simulation.