【摘要】 在分析目前矿井低压电网漏电保护系统的基础上,提出了以PIC16F877A为核心,基于附加直流电源检测和零序功率方向的新型选择性漏电保护方案,简化了传统保护装置的设计,可以改善井下低压电网漏电保护的动作性能.重点分析保护系统原理,并简要介绍了保护装置的实现,本系统可以提高井下低压电网的安全性能.更多还原

【Abstract】 Based on the analysis of the present leakage-protection system for underground low voltage distribution networks,this paper puts forward a new selective leakage-protection scheme based on additional DC power supply and direction of zero sequence power with PIC16F877A as the core,which simplifies the design of conventional protection devices and can enhance levels of safety for underground low voltage distribution networks.This paper emphatically analyzes principles of protective systems,introduces the realization of protection device briefly.This system can improve security of low voltage distribution networks.更多还原