Open AccessResearch on Fault Location of SF6 Circuit Breaker Relay Coil Based on Traveling-Wave Reflection Method
Author(s) -
Shuaiwei Qian,
Lu Wang,
Jianxi Chen,
Yanjun Peng,
Ningbo Pan,
Yongqiang Huang,
Zuhong Xiong
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2246/1/012059
Subject(s) - circuit breaker , reflection (computer programming) , inductance , fault (geology) , electromagnetic coil , electrical engineering , acoustics , physics , voltage , electronic engineering , engineering , computer science , geology , seismology , programming language
—The traveling wave-reflection method is proposed to locate the short circuit fault of the opening/closing coil of the circuit breaker, the capacitance and inductance matrix of the opening/closing coil are calculated by finite element simulation, and the wave impedance model of the coil is established based on ATP-EMTP. A low-voltage square wave pulse signal is injected into the head end of the winding to detect the characteristic curve of the reflected wave when an inter-turn short-circuit fault occurs. The generalized fractal dimension of reflection wave characteristic curve was calculated and its variation as the position of short circuit change was analysed. Compared with box dimension, the variation of information dimension and correlation dimension are more obvious, thus information dimension and correlation dimension are selected as inpus, and the evaluation model of inter-turn short circuit position is established based on probabilistic neural network.