变电站站用变保护用电流互感器选择方法探讨  

Discussion on the Selection Method of Current Transformer for Transformer Protection in Substation Stations

作　　者：龚明 李乐乐 杨司全 王溯鑫 睢文朋 GONG Ming;LI Lele;YANG Siquan;WANG Suxin;SUI Wenpeng

机构地区：[1]吉林省骏天电力工程设计有限公司,吉林长春130000

出　　处：《电力系统装备》2023年第9期49-51,共3页Electric Power System Equipment

摘　　要：为提高变电站站用变保护用电流互感器保护定值的正确率,文章通过实际工程计算出站用变保护装置的整定值电流,并对选择电流互感器参数进行分析,依据3~35kV系统电流互感器性能特点对站用变保护用电流互感器性能进行了校验,且根据站用变微机保护装置的工作原理和其具有互感器抗饱和影响能力的特点,提出了在短路故障时不以互感器不饱和为条件,而是以站用变保护整定值和保护装置精确工作电流范围,将结合实际工程参数进行校验的方式,最终确定电流互感器变比的建议。In order to improve the correct setting rate of transformer protection for substation station,this paper calculates the setting current of transformer protection device for station through actual engineering,analyzes the parameters of selected current transformer,and verifies the performance of transformer for station transformer protection according to the performance characteristics of current transformer for 3~35kV system.And according to the working principle of station transformer protection device,because it has the characteristic of transformer’s ability to resist saturation influence,it is proposed that the transformer’s ratio should be determined by the setting value of station transformer protection and the precise working current range of protection device,combined with the actual engineering parameters,instead of using the transformer’s unsaturated condition when the short-circuit fault occurs.

关 键 词：变电站 站用变保护整定值 电流互感器校验 

分 类 号：TM452[电气工程—电器]