摘要
根据故障录波图对穿越性故障电流进行了定量计算,对差动回路暂态不平衡电流、差动继电器最小动作电流、最小制动电流以及制动系数的实际整定配合进行了分析。结合事故后检查的差动继电器特性,分析说明了该保护误动的真正原因。提出了相应的对策。
According to the failure current oscillograph and quantitative calculation of exterior fanlt current.the tran-sient unbalance current of the differential circuit,the minimum operating current,the min imum restraint cur rent and the percentage restraint factor have been analyzed in this paper.Combined the checked characteristics of the CD-10defferential relay after its misoperation,the real cause of this differential pro tection misoperation and its countermea-sures are proposed.
出处
《华中电力》
2001年第6期33-35,共3页
Central China Electric Power
关键词
发电机
差动保护
误动作
CD-10型
电力系统
Protection misoperation,transient unbalance current,the minimum restraint current,countermeasures.
