基于零序电流方向选择性漏电保护的研究

Research on Selective Leakage Protection Based on Zero Sequence Current Direction

为保障煤矿生产的安全性,煤矿井下低压馈电开关中须装设选择性漏电保护装置。文中阐述了基于零序电流方向选择性漏电保护的工作原理,介绍了以单片机80C196KB为核心,通过相敏整流的方法来判断零序电流方向的实施方案,具有抗干扰性能好,实施电路简单的优点。

In order to ensure safety of mine, it is necessity to install selective leakage protective system in underground LV Feeder Switchgear. The paper Presents the principle of selective leakage protection based on zero sequence current direction. Introduces the reliability way of detecting zero sequence current direction by phase - sensitive rectification using single - chip microcomputer 80C196KB as the core. It has characteristics of good performance of anti - interference and simple circuit