小电流接地选线技术在石化企业的应用

Application of adaptive bus operation mode of small current grounding line selection technology

在石化企业配电系统中,集中式零序小电流接地选线设备需要实时识别母线的运行方式完成选线。传统方法通过接入开关断路器位置信号或人为整定的方式来识别,不能满足自动化控制要求。文中通过判断故障零序电压的变化,应用系统软件实现了母线运行方式的自动识别。

In petrochemical power distribution system,the centralized zero sequence small current grounding line selection equipment need real time identification of the bus operation mode to complete line selection. The traditional method performs identification through access switch circuit breaker position signal or manual setup,which can't meet the automatic control requirement. By judging the change of fault zero sequence voltage and application system software,the automatic identification of the bus operation mode has been realized.