集散式选择性漏电保护系统的研究与实现

Design and Application of Distributive and Selective Leakage Protection System

对供电系统中传统漏电保护装置进行比较分析,结合济三煤矿选煤厂660V高阻接地供电系统,提出并研制开发了利用零序功率方向原理,以DSP为核心,采用分层分布式结构的新型选择性漏电保护系统,实现了漏电保护的快速性和选择性,着重介绍了该漏电保护系统的基本原理以及软、硬件设计。

Based on the analysis of traditional leakage protection and research of the 660V high-resistance grounding power system in coal preparation plants,a new leakage protection system is described in this paper, which structure is distributive. This system using a new criteria of leakage protection which is based on the direction and value of zero-sequence power and using sing-chip microcomputer DSP as core, improves the celerity and selectivity of leakage protection. This paper mainly introduced the basic principle of leakage protection system and design of software and hardware.