摘要
变电站内低压母线设置快速保护具有非常重要的意义,实现快速保护主要问题是区分母线故障和线路近区故障,对于并列运行的低压母线还需区分故障母线和非故障母线。提出了一种新的在并列运行下区分故障母线和非故障母线的方法。通过现场总线传送线路动作闭锁信息、分段的功率方向或电流矢量到变压器后备保护。后备保护通过线路动作闭锁信息区分母线故障和线路故障,通过分段的功率方向或电流矢量区分故障母线和非故障母线,实现低压母线保护的快速性和选择性。经过工程测试,通过该方法实现的低压母线保护动作快速、准确,具有工程应用价值。
The substation set-up rapid protection in low voltage bus has very important significance. The main problem of achieving rapid protection is how to distinguish fault bus from near fault line. The parallel operation of low pressure bus still need to distinguish fault from non-fault bus. This paper presents a method of distinguishing fault from non-fault bus in the parallel operation. Through fieldbus moves the locking information of line, the direction of section breaker＇s power or current to the transformer backup protection. Through the locking information of line, the backup protection can distinguish between bus fault and line fault. Through the direction of section breaker＇s power or current, the backup .protection can distinguish between fault and non-fault bus.It can achieve low voltage busbar protection of the rapidness and selectiveness, after engineering tests.
出处
《继电器》
CSCD
北大核心
2007年第21期7-9,共3页
Relay
关键词
微机保护
低压母线
现场总线
microprocessor-based protection
low voltage bus
fieldbus
