摘要
本文针对某核电厂开关站500k V母线故障时,母差保护装置RADSS拒动事件,分析得出RADSS母差保护拒动的根本原因是故障时电流互感器(CT)根部浪涌吸收器导通,导致流过RADSS保护装置的故障电流被分流。根据这一分析结果,采取了将RADSS母差保护装置整体换型为微机型母差保护装置的措施,最终提高了母差保护的稳定性,保证了核电厂厂外电源的安全稳定。
Aiming at the non-response problem ofbusbar differential protection device （RADSS） when 500 kV busbar fault occurred in a nuclear power plant, the reason of RADSS non-response, which is analyzed, is that CT＇s surge absorber which is closed leads to fault current is shunt. According to the result of analysis, this paper takes a measure which is that the RADSS is replaced by micro-processor busbar differential protection device. As a result, the busbar differential protection device reliability is greatly improved and thus the salty and stablity of the offsite power system is ensured.
出处
《核安全》
2015年第2期30-34,共5页
Nuclear Safety
基金
环保公益性行业科研专项之福岛核事故后二代改进型核电厂改进措施的技术要求研究
课题编号201309054
关键词
母差保护
拒动
浪涌吸收器
核电厂
厂外电
busbar differential protectiom non-response~ surge absorber
nuclear power plant
offsite power system
