地铁中压供电系统选跳保护原理及试验方法

Selective Tripping Principle for Metro Medium Voltage Power Supply System and Test Method

从差动保护原理出发,通过介绍差动与选跳2种保护的不同点,论述了选跳保护的动作原理,并以变电站10kV进线故障、出线故障和母线故障3种故障状态时选跳保护的动作情况为例,总结出选跳保护的特点。最后结合现场实际调试经验,介绍了选跳保护的2种试验调试方法。

Starting from introduction of differential protection principle, and by introduction of differences between differential protection and selective tripping protection, illustrates the acting principle for selective tripping protection. And on basis of selective tripping protection actions during failure of 10 kV incoming line, outgoing line and bus bar, obtains the selective tripping protection features. And finally in combination with actual site commissioning experiences, introduces two test and commissioning methods for selective tripping protection