摘要
针对国内矿用高压馈电开关保护系统存在的问题,提出了基于零序电压基波启动、五次谐波功率方向比较的选择性漏电保护原理,设计了一种基于DSP和单片机双CPU结构的微机保护系统。该系统能自动判断短路、过载、过压、欠压、漏电等故障,并对高压电网的绝缘水平进行实时监测。经实际测试,各项指标达到设计要求。
Aim at existing problem of protection system for high-voltage feeding switchgear in mine, the selective leakage protective method based on fundamental enabling of zero-sequence voltage and direction comparison of fifth harmonic power is presented in paper, a microprocessor-based protection system based on of DSP and single chip of double CPU microcomputer is designed. The electrical faults such as short circuit, over-load, over-voltage, undervoltage, electrical leakage and so on can be automatically distinguished, and the insulation level of HV distribution network can be supervised in real time by the system. Practical test shows each index achieves design requirement.
出处
《煤矿机电》
2008年第4期17-20,共4页
Colliery Mechanical & Electrical Technology
关键词
DSP
选择性漏电
综合保护
DSP
selective current leakage
integration protector
