35kV电子式电流互感器绝缘结构设计  

Insulation Structure Design of 35 kV Electronic Current Transformers

作　　者：任晓[1] 方春恩[1] 李伟[1] 温佐云[1] 侯祥玉 何海峰[3] 

机构地区：[1]西华大学电气信息学院,四川成都610039 [2]四川泰克电器有限公司,四川成都611741 [3]广安电业局,四川广安638000

出　　处：《电工电气》2012年第4期21-24,共4页Electrotechnics Electric

基　　金：智能电气设备重点实验室项目(XZD0819);四川省电力电子重点学科项目(SZD0503)

摘　　要：为解决35kV电子式电流互感器屏蔽盒局部电场过高和电场分布不均匀的问题,利用Ansoft软件包建立有限元模型,模拟实际情况进行仿真分析,得到电场分布图、最大电场强度及位置、典型位置电场分布曲线;通过比较不同方案中电场强度的最大值,确定最佳绝缘结构设计方案。在此基础上,制作了6台35kV电子式电流互感器样机,经测试其两种方案的电子式电流互感器的绝缘水平均满足相关国家标准要求,且倒角的电子式电流互感器局部放电量远小于20pC的限值要求。To solve the problems of exorbitance of partial electric field and the nonuniform electric field, this paper simulated electric field dis- tribution of an electric current transformer by using the software package of Ansofl, which was based on the finite element model. The electric field distribution graph, the maximum electric field intensity and its position, the distribution curve of the typical position were obtained by calculating and analyzing the electric field of the electronic current transformer （ECT）. By comparing the maximum electric field intensity of different schemes, the optimal insulation design scheme was determined. On the basis of this, six 35 kV electronic current transformers have been developed and tested. The results show that the two scheme＇s transformer insulation level could satisfy the requirement of the relevant standards. Also, the partial discharge of the chamfered electronic current transformers is much smaller than 20 pC limits requirements.

关 键 词：电子式电流互感器 有限元分析 电场强度 电场分布 优化设计 局部放电 

分 类 号：TM452[电气工程—电器] TM854