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,既简化了传统保护装置的设计,又改善井下低压电网漏电保护的动作性能。本文重点分析保护系统原理,并简要介绍保护装置的实现,可以提高井下低压电网的安全性能。
By analyzing the current leakage-protection system tor mine low-voltage electric networK, me paper puts forward a new scheme of selective 1 eakage-protection taking PIC16F877A as core and based on the additional detection of DC power supply in addition to the direction of zero sequence power. The scheme not only simplifies the design of conventional protection device but also improves the action performance of leakage-protection for underground low-voltage electric network. The paper emphatically analyzes the principle of protection system and briefly introduces the realization of protection device, which enhances the safety performance of underground low-voltage electric network.
出处
《煤矿机电》
2005年第6期1-3,共3页
Colliery Mechanical & Electrical Technology
