煤矿电网网络化母线保护技术研究

Research on Networked Bus Protection Technology of Coal Mine Grid

针对煤矿电网中母线保护可靠性、速动性差的问题,采用智能变电站技术,通过GOOSE网络进行信息共享和交互,利用多保护单元协同实现母线保护功能。保护方案构造了母线相间短路保护启动判据和功率方向识别逻辑,并通过GOOSE网络共享各间隔功率方向信息,构造网络化母线保护故障识别判据和容错方案。采用MATLAB/Simulink搭建母线保护模块,仿真证明网络化方向式母线保护的故障定位准确、容错性强、速动性高。

In order to improve the reliability and speed of bus protection in coal mine grid, a smartsubstation technology is adopted, in which bus protection method is constructed by interactiveinformation and cooperation through the GOOSE network, and the start-up criterion of bus phase-to-phase short-circuit and the logic of power direction identification are realized. And fault identificationand fault tolerant scheme of networked bus protection is constructed, in which power directioninformation of each interval are shared via GOOSE network. Networked bus protection module is builtby MATLAB/Simulink to show the accurate identification, strong fault tolerance and high speed ofnetworked protection.