煤矿井下高低压保护定值整定分析

Analysis of Setting of Underground High and Low Voltage Protection Value

针对矿井供电网络常因保护定值设置不当导致保护误动或拒动的问题,阐述了煤矿井下高低压保护中三段式电流保护、电压保护、选择性漏电保护、附加直流保护、非电量保护的原理及具体的整定方法,并给出了三段式电流保护整定的实例分析。

In allusion to problem that improper setting of protection value of power supply networks of coal mine often caused misoperation or rejection of protection, the paper described principles and specific setting methods of three-section current protection, voltage protection, selective leakage protection, additional DC protection and non-electrical protection of underground high and low voltage protection. It also gave instance analysis of setting of three-section current protection.