Research on Medium-voltage Electronic Transformers

WAN Xiong; ZHANG Gui-xin; WANG Qiang; WANG Peng

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Research on Medium-voltage Electronic Transformers

更新时间：2025-04-26

- Research on Medium-voltage Electronic Transformers
- High VoltageApparatus Vol. 45, Issue 3, Pages: 61-65(2009)
- 作者机构：
  
  清华大学电机工程与应用电子技术系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM45
- Published：2009
- 稿件说明：
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[1]万雄,张贵新,王强,王鹏.影响中压电子式互感器准确度问题的研究[J].高压电器,2009,45(03):61-65.

WAN Xiong, ZHANG Gui-xin, WANG Qiang, et al. Research on Medium-voltage Electronic Transformers[J]. High voltageapparatus, 2009, 45(3): 61-65.
[1]万雄,张贵新,王强,王鹏.影响中压电子式互感器准确度问题的研究[J].高压电器,2009,45(03):61-65. DOI：

WAN Xiong, ZHANG Gui-xin, WANG Qiang, et al. Research on Medium-voltage Electronic Transformers[J]. High voltageapparatus, 2009, 45(3): 61-65. DOI：

摘要

中压电子式电压互感器和电流互感器在试验和运行中暴露出了一系列的问题

笔者主要针对电子式电流互感器的饱和特性以及电子式电压互感器的温度特性进行讨论。非线性励磁特性的电流互感器通常都是由闭合铁心制成的

在大多数情况下

由于在过渡状态中铁心饱和

而使这种电流互感器变换一次电流的周期性分量产生的误差大大超过容许值。同时分析铁心带气隙的电流互感器

总结了铁心有非磁性气隙的特点。介绍了基于电阻分压原理的电子式电压互感器的原理及结构

分析了影响其温度特性的因素

提出采用热敏电阻的温度补偿办法提高中压电子式电压互感器温度稳定性。

Abstract

The electronic transformers have a series of problems in testing and operation.This paper discusses the saturation characteristics of electronic current transformer and the temperature characteristics of electronic voltage transformer.Current transformer with nonlinear excitation characteristics usually includes a closed-core.It can not work in transient process because of core saturation.This paper analyzes the features of the current transformer with non-magnetic air gap.The principle and structure of the electronic voltage transformer based on voltage divider are introduced

and the factors affecting its temperature characteristic are analyzed.Hence

a method of temperature compensation via thermistor is presented to enhance the temperature stability of the medium-voltage electronic transformers.

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清华大学电机工程与应用电子技术系北京100083

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