Zero sequence fault is a common fault in medium voltage distribution net.
in order to improve the power supply reliability of medium voltage distribution net.in
this paper, an intelligent zero sequence fault recording and comprehensive diagnosis
device is popularized, which mainly USES artificial neural network (ANN) and expert
system (ES). The zero-sequence fault recording and comprehensive diagnosis system
can fully capture the recording data of all the zero-sequence signals before and after the
occurrence of the fault, which can be used to diagnose and analyze the zero-sequence
fault online, thus greatly reducing the labor intensity of monitoring personnel and
improving the reliability and safety of power supply.