中压配电网零序故障分析及诊断方法

Fault Analysis and Diagnosis of Zero-sequence Medium Voltage Distribution Network

零序故障是中压配网中一种常见的故障,为提高中压配网的供电可靠性,本文推广一种智能型零序故障录波及综合诊断装置,主要是利用人工神经网络(ANN)和专家系统(ES)融为一体的神经网络专家系统。零序故障录波及综合诊断系统可完整捕获故障发生前后所有零序信号的录波数据,利用这些数据即可对零序故障进行在线诊断及分析,从而大大减轻监控人员劳动强度,提高供电可靠性、安全性。

Zero-sequence fault is a common failure for medium voltage distribution network.To improve the reliability of power supply of medium voltage distribution network,this paper promotes a kind of intelligent zero-sequence fault recorder and comprehensive diagnostic device,mainly using the artificial neural network（ANN） and expert system（ES） integration of the neural network expert system.Zero-sequence fault recorder and comprehensive diagnostic system can capture perfectly all the zero sequence signals recorded data before and after failure.These data can be used on-line diagnosis and analysis Zero-sequence fault,thus reducing greatly the labor intensity of monitor staff and improve power supply＇s reliability security.