特高压直流逆变侧阀区接地故障投旁通对策略研究  

Research on Bypass Pair Strategy for Grounding Fault of UHVDC Inverter Valve Region

作　　者：李广宇[1] 陈乐[1] LI Guang-yu;CHEN Le(NR Electric Co.,Ltd,Nanjing 211102,China)

机构地区：[1]南京南瑞继保电气有限公司

出　　处：《电工电气》2019年第11期30-33,37,共5页Electrotechnics Electric

摘　　要：特高压直流系统逆变侧阀区出现接地故障后,现在采用的动作策略中是禁投旁通对的,这在站间通信中断的部分工况下会导致阀组出现过压损坏的安全风险。结合实际工程RTDS仿真案例,详细分析了禁投旁通对策略导致阀组过压的原因和过程,并提出了投旁通对策略的优化方案。仿真试验结果验证了优化策略的有效性,与原有策略相比,优化策略不仅避免了阀组出现过压损坏的风险,而且加快了保护动作后阀组闭锁的过程,有效保证了阀组的安全。After grounding fault occurred in the inverter valve region of UHVDC system,the action strategy adopted now is the forbidden bypass pair,which will lead to the safety risk of overpressure damage to the valve under some working conditions when the communication between stations is interrupted.Combined with the actual engineering RTDS simulation case,this paper analyzed the cause and process of the overpressure caused by the forbidden bypass pair strategy in detail and proposed the optimization scheme of the bypass pair strategy.The RTDS simulation results verify the effectiveness of the optimization strategy.Compared with the original strategy,this optimization strategy not only avoids the risk of overpressure damage of the valve,but also speeds up the process of the valve blocking after the protection action,which effectively ensures the safety of the valves.

关 键 词：特高压直流 逆变侧 阀区接地故障 旁通对 策略优化 RTDS仿真 

分 类 号：TM721.1[电气工程—电力系统及自动化]