电测与仪表Issue(23)：1-5,5.
表征开口式电流互感器工作原理的解析模型
An Analytical Model of Air-Gap-Core Current Transformer Considering Loading Effect
陈彬 1李世松 2卢欣 1肖勇 2赵伟 2黄松岭 2傅壮2
作者信息
- 1. 国网天津市电力公司 电力科学研究院，天津300384
- 2. 清华大学电机系，北京100084
- 折叠
摘要
Abstract
The current transformer conventionally employs a closed magnetic circuit design. But limited to the satura-tion of the magnetic core,when a short-circuit fault occurs in the primary coil,the DC current component will seri-ously affect the performance of the current transformer,leading to non neglectful errors for sensing the primary cur-rent. The air-gap-core current transformer increases the magnetic reluctance through the introduction of an air gap in the magnetic circuit,which can effectively reduce the core saturation with DC excitation. Based on fundamental e-quations of the magnetic and electrical circuits,an analytical model for the air-gap-core current transformer is pres-ented with considering the loading effect of the secondary coil. Influences of different parameters on the air-gap-core current transformer are discussed. The established model supplies basic theoretical guidance towards compatibility of an air-gap-core current transformer for realizing both measurement and protection as well as improving the accu-racy of a clamp current transformer that is used for power meter online calibration.关键词
电流互感器/空气隙/测量误差/解析模型/测量准确度Key words
current transformer/air gap/measurement error/analytical model/measurement accuracy分类
信息技术与安全科学引用本文复制引用
陈彬,李世松,卢欣,肖勇,赵伟,黄松岭,傅壮..表征开口式电流互感器工作原理的解析模型[J].电测与仪表,2014,(23):1-5,5.
