防越级跳闸保护器在煤矿井下供电系统的应用

Application of Anti-override Trip Protector in Coal Mine Underground Power Supply System

指出了现有煤矿供电系统光纤纵差保护防越级跳闸、接点闭锁防越级跳闸、集控式防越级跳闸方法的优缺点,介绍了一种高开综合保护分布式防越级跳闸保护系统,该系统基于自适应保护原理,采用分布式区域保护,信息传输,就地诊断,快速切除故障区域,提高了系统防越级跳闸的可靠性。通过在麻家梁煤业的实际应用,验证了该系统防越级跳闸的快速性和可靠性,实现了全保护区域的越级跳闸防护,有效预防了煤矿供电系统越级跳闸事故的发生。

The paper points out the advantages and disadvantages in different anti-override tripping protection among fiber-optic longitudinal differential,Connection blockade and Centralized control operation model in the existing coal mine power supply system.An onsite new High Voltage Switchgear comprehensive protection system is introduced.The system is based on the principle of self-adaptive protect with on-site installation for a given range covers information transmission,onsite analysis,and quick removal of fault circuit,which improves the reliability of the system against tripping.The application in Majialiang coal mine verified the rapidity and reliability of the system’s anti-override tripping,and the implementation of anti-override tripping protection in the given section guaranteed the power supply in the coal min.