Method for Measuring Power Transformer Insulation Resistance Based on High-voltage and High-resistance Bridge

LIU Heng; CHEN Wenhong; SHEN Jiantao; HE Yihong

doi:10.13296/j.1001-1609.hva.2020.07.033

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Method for Measuring Power Transformer Insulation Resistance Based on High-voltage and High-resistance Bridge

更新时间：2025-04-26

- Method for Measuring Power Transformer Insulation Resistance Based on High-voltage and High-resistance Bridge
- High VoltageApparatus Vol. 56, Issue 7, Pages: 224-228(2020)
- 作者机构：
  
  1. 广东电网有限责任公司江门供电局
  2. 五邑大学智能制造学部
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.07.033
  CLC： TM41;TM934.3
- Published：2020
- 稿件说明：
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[1]刘恒,陈文鸿,沈剑韬,何益宏.一种电力变压器绝缘电阻的高压高阻电桥测量方法[J].高压电器,2020,56(07):224-228.

LIU Heng, CHEN Wenhong, SHEN Jiantao, et al. Method for Measuring Power Transformer Insulation Resistance Based on High-voltage and High-resistance Bridge[J]. High voltageapparatus, 2020, 56(7): 224-228.
[1]刘恒,陈文鸿,沈剑韬,何益宏.一种电力变压器绝缘电阻的高压高阻电桥测量方法[J].高压电器,2020,56(07):224-228. DOI： 10.13296/j.1001-1609.hva.2020.07.033.

LIU Heng, CHEN Wenhong, SHEN Jiantao, et al. Method for Measuring Power Transformer Insulation Resistance Based on High-voltage and High-resistance Bridge[J]. High voltageapparatus, 2020, 56(7): 224-228. DOI： 10.13296/j.1001-1609.hva.2020.07.033.

摘要

变压器绝缘性能试验能有效判断变压器是否存在整体受潮、部件表面受潮及贯穿性缺陷

是变压器能否投入运行的重要依据。文中在用于高压高阻测量的惠斯通电桥基础上

研究一种电力变压器绝缘电阻的测量方法

利用模糊PID控制器较好的的跟踪能力及响应速度调节电桥平衡

再根据平衡公式准确算出变压器绝缘电阻值。在用扩展德拜模型模拟等效变压器绝缘电阻基础上

建立测量系统的仿真模型

实验结果也与计算结果相一致

从而验证了该方法的可行性。

Abstract

The insulation performance test of transformer can effectively judge whether the transformer has the defects of overall dampness

component surface dampness and penetrability

which is the important basis of whether the transformer can be put into operation.This paper studied a method for measuring the insulation resistance of power transformer based on the Wheatstone bridge used for high-voltage and high-resistance measurement

the bridge balance was adjusted by the fuzzy PID controller with better tracking ability and response speed

and then the insulation resistance value was calculated accurately according to the balance formula. The simulation model of measurement system was established based on the extended Debye model of equivalent and simulative transformer insulation resistance

and the feasibility of this method was verified. The experimental results also verified the correctness of the method.

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