摘要
通过对220kV万奉线奉节站侧重合闸未动作的原因分析,发现了在线路发生三相电流同相故障时,弱电源侧LFP-901A、902A型保护逻辑存在的不足,误将保护三跳当作开关偷跳并走单重逻辑,由于三相无流不满足单相跳闸条件而导致重合闸未起动,同时误发HB2保护动作并对重合闸放电,彻底导致重合闸不能动作。对此提出了防范措施,厂家也据此对装置软件进行了完善和升级,从而消除了隐患,提高了装置动作的可靠性。
This paper analyses the reasons of 220 kV Wanxian-Fengjie power line's reclosures miss trip in 220 kV Fengjie substation. It finds LFP-901A, LFP-902A power protection device's tripping logic existing deficiency in the weak power source system, Some solutions are proposed to improve and upgrade the device's software,It is helpful to the operation reliability,
出处
《继电器》
CSCD
北大核心
2007年第17期65-68,共4页
Relay
关键词
重合闸
弱电源
电流同相
逻辑
reclosure
weak power source system
current synchronism
logic