摘要
超高压直流输电系统换流变压器非电量保护类型众多,运行中多次出现非电量保护误动的情况,引起多次超高压直流输电系统非计划停运。介绍了超高压直流输电系统在运换流变压器非电量保护配置情况,指出了非电量保护误动的原因,提出加强非电量保护继电器的维护、合理地设置非电量保护的动作后果和修改非电量保护的动作逻辑,避免非电量保护误动,提高超高压直流输电系统的运行可靠性。
Several non-electrical protections are installed in converter transformer in EHVDC system in China.These non-electrical protection faults happen frequently in operation and cause EHVDC system unplanned outages.In this paper,the non-electrical protection settings of converter transformers are introduced and the fault reasons are analyzed.The conclusion is drawn out that through enhancing the maintenance work of protection relays and secondary circuits,setting the action result of non-electrical protection,modifying the logic of protection are the solutions to avoid non-electrical protection fault in EHVDC system.
出处
《华中电力》
2010年第5期52-55,共4页
Central China Electric Power
关键词
换流变压器
非电量保护误动
原因分析
解决措施
converter transformer
non-electrical protection fault
reason analysis
solution
