Winding Impulse Voltage Distribution Based on Transformer Reduced-scale Model

YANG Qing; CHEN Yong; SIMA Wenxia; ZHAO Hongbin; LIU Hongwen

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Winding Impulse Voltage Distribution Based on Transformer Reduced-scale Model

更新时间：2025-12-08

- Winding Impulse Voltage Distribution Based on Transformer Reduced-scale Model
- Vol. 42, Issue 12, Pages: 3955-3963(2016)
- 作者机构：
  
  1. 重庆大学输配电装备及系统安全与新技术国家重点实验室
  2. 云南电网有限责任公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 December 2016，
  
  Published：2016
- 稿件说明：
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YANG Qing, CHEN Yong, SIMA Wenxia, et al. Winding Impulse Voltage Distribution Based on Transformer Reduced-scale Model[J]. 2016, 42(12): 3955-3963.
DOI：

YANG Qing, CHEN Yong, SIMA Wenxia, et al. Winding Impulse Voltage Distribution Based on Transformer Reduced-scale Model[J]. 2016, 42(12): 3955-3963. DOI：

摘要

实际运行的电力变压器绕组无抽头引出线

无法直接测量其冲击电压分布。采用电气特性相似并带抽头的变压器缩比模型代替原模型进行绕组冲击电压分布研究具有重要的工程实用价值。首先在缩比模型和原模型各种物理特性常数和电场强度相同的条件下

根据物理量间的关系

推导了较简化的缩比准则;然后根据实际电力变压器原模型和缩比准则设计了一台相似比为1/20和型号为10 k VA、220 V/2 400 V且带抽头的变压器缩比模型;其次

用有限元仿真软件COMSOL Multiphysics进行了缩比模型与原模型的电场、磁场和电磁场综合仿真对比分析

验证了该缩比准则的正确性。最后

搭建试验平台测量变压器缩比模型在纳秒脉冲下的绕组冲击电压分布。得出变压器绕组冲击电压分布极不均匀

高压端承受电压较大。

Abstract

The impulse potential distribution in actual power transformer winding（due to possessing no tap pin）can not directly be measured. Using similar electric property and tapped transformer model instead of the original model to research the measuring impulse voltage distribution has important engineering practical value. To research all kinds of physical constants and electric field intensity under the same conditions between reduced-scaled and original models

according to the relationship between physical quantities

we established a simplified shrinkage ratio criterion. Secondly

according to the actual power transformer original model and shrinkage ratio criterion

we designed a similar ratio 1/20

typed 10 k VA-220 V/2 400 V tapped transformer reduced-scaled model. Then

using the finite element simulation software COMSOL Multiphysics

we simulated the reduced-scaled and original models of the electric field

magnetic field

and electromagnetic field. Finally

we established a test platform to measure the winding impulse voltage distribution of transformer reduced-scaled model under ns pulse voltage. The comprehensive and comparative analyses of the simulation verify the correctness of the rule of shrinkage ratio. It is found that the impulse voltage distribution of transformer winding is uneven and high-voltage side withstanding voltage is higher.

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