天广工程直流线路突变量保护误动作分析  

Analysis on the Fault Trip of Bipole DC Line Protection in Tianguang HVDC

作　　者：田庆 

机构地区：[1]南方电网超高压输电公司检修试验中心,广州510663

出　　处：《高压电器》2012年第4期33-38,共6页High Voltage Apparatus

摘　　要：笔者分析了天广直流控制保护系统改造完成后发生的3次双极线路保护动作事件,剖析其中直流线路突变量保护误动作的原因。根据天生桥换流站和广州换流站的实际录波和实际过程,结合厂家给出的突变量保护定值和整定思想,分析导致突变量保护误动作的因素。笔者给出了2个解决方案——降低低电压保护定值和增大突变量保护的动作延时,并经实践验证正确,为以后更好地实施直流控制保护系统国产化改造提供参考。This paper analyses three bipole line protection accidents after the completion of the Tianguang HVDC control and protection regenerated system.The reason of DC line dU/dt protection fault trip is given according to the transient fault record in Tianshenqiao convertor station and Guangzhou convertor station.The set value of dU/dt protection and the setting process are studied in order to understand the fault trip.Two corresponding methods,lowing the under voltage protection value and increasing the dU/dt protection value,are put forward which are proved by the field effect.When these methods are utilized in future China home-produced HVDC control and protection system,the HVDC can operate better.

关 键 词：天广直流 突变量保护 双极线路保护动作 

分 类 号：TM773[电气工程—电力系统及自动化]