TPY级电流互感器暂态特性分析及参数校验计算  

Transient Characteristic Analysis and Parameter Calibration Calculation of TPY Current Transformer

作　　者：朱晓航 陈维莉[1] ZHU Xiaohang;CHEN Weili(Central Southern Electric Power Design Institute,Wuhan 430071,China)

机构地区：[1]中南电力设计院,湖北武汉430071

出　　处：《电工技术》2022年第1期99-102,105,共5页Electric Engineering

摘　　要：TPY级电流互感器凭借良好的暂态误差性能而广泛应用于高电压等级线路及大型发电机、变压器的继电保护中。针对工程设计阶段的二次参数校验计算,研究了TPY级电流互感器的暂态特性,分析了暂态过程中励磁电流的变化情况,并推导了单次及双次循环工作方式下的暂态面积系数公式。在此基础上,论述了基于等效二次极限电动势及最大瞬时误差的参数校验判据,同时提出了相应的校验步骤。依托驻马店±800 kV换流站工程,应用该参数校验方法对交流500 kV串中TPY级电流互感器进行了验证,为后续工程电流互感器的参数设计选型提供了理论依据。With good transient error performance,TPY current transformer is widely used in the relay protection of high-voltage lines,large generators and transformers.Aiming at the secondary parameter verification calculation in the engineering design stage,the transient characteristics of TPY current transformer are studied,the variation of excitation current in the transient process is analyzed,and the transient area coefficient formulas under single and double cycle working mode are deduced.On this basis,the parameter verification criteria based on equivalent quadratic limit electromotive force and maximum instantaneous error are discussed,and the corresponding verification steps are put forward.Relying on Zhumadian±800 kV converter station project,the parameter verification method is applied to verify the TPY current transformer in AC 500 kV Series,which provides a theoretical basis for the parameter design and selection of current transformer in subsequent projects.

关 键 词：TPY级 电流互感器 暂态特性 参数校验 

分 类 号：TM452[电气工程—电器]