Effect of Sulfur Corrosion on the Characteristic of Partial Discharge in Turn-to-turn Winding Insulation in Power Transformer

HU Ende; ZHAO Weimiao; XU Tiantian; XU Jiquan; LIANG Shuaiwei

doi:10.13296/j.1001-1609.hva.2020.01.032

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Effect of Sulfur Corrosion on the Characteristic of Partial Discharge in Turn-to-turn Winding Insulation in Power Transformer

更新时间：2025-04-26

- Effect of Sulfur Corrosion on the Characteristic of Partial Discharge in Turn-to-turn Winding Insulation in Power Transformer
- High VoltageApparatus Vol. 56, Issue 1, Pages: 216-223(2020)
- 作者机构：
  
  1. 国网浙江省电力公司绍兴供电公司
  2. 国网浙江省电力公司检修分公司
  3. 国网浙江省电力公司宁波供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.01.032
  CLC： TM855
- Published：2020
- 稿件说明：
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[1]胡恩德,赵伟苗,许甜田,徐积全,梁帅伟.变压器油中硫腐蚀对绕组匝间绝缘局部放电特性的影响研究[J].高压电器,2020,56(01):216-223.

HU Ende, ZHAO Weimiao, XU Tiantian, et al. Effect of Sulfur Corrosion on the Characteristic of Partial Discharge in Turn-to-turn Winding Insulation in Power Transformer[J]. High voltageapparatus, 2020, 56(1): 216-223.
[1]胡恩德,赵伟苗,许甜田,徐积全,梁帅伟.变压器油中硫腐蚀对绕组匝间绝缘局部放电特性的影响研究[J].高压电器,2020,56(01):216-223. DOI： 10.13296/j.1001-1609.hva.2020.01.032.

HU Ende, ZHAO Weimiao, XU Tiantian, et al. Effect of Sulfur Corrosion on the Characteristic of Partial Discharge in Turn-to-turn Winding Insulation in Power Transformer[J]. High voltageapparatus, 2020, 56(1): 216-223. DOI： 10.13296/j.1001-1609.hva.2020.01.032.

摘要

变压器油中的腐蚀性硫化物会腐蚀铜绕组而在绝缘纸表面产生硫化亚铜沉积物

该沉积物具有导电性。为了研究该物质对绕组匝间绝缘的局部放电特性的影响

将绝缘绕组真空干燥后放入变压器油中进行真空浸油

同时在油中放入不同含量的腐蚀性硫化物

并在实验室条件下对油纸绝缘介质进行加速硫腐蚀试验;腐蚀后对铜绕组展开并观察铜条与绝缘纸表面腐蚀情况;对不同腐蚀程度的油纸绝缘介质进行局部放电测试

记录局部放电起始电压与放电量随相位变化的q-φ谱图

最大放电量与平均放电量随相位变化的H

qmax

（φ）与

Hqave

（φ）谱图。结果表明:绕组表面的沉积物为硫化亚铜;油中腐蚀性硫化物浓度越大

绕组被腐蚀的越严重

绕组的局部放电的起始电压越低;腐蚀导致局部放电特性发生变化

放电量变大

放电相位变宽且放电相位更容易发生移动。硫化亚铜物质是引起绕组的局部放电特性发生变化的原因。

Abstract

The Cu

S deposition can be formed on insulation paper surface due to the corrosion reaction between cor-rosive sulfur in transformer oil and copper winding. This deposition presents conductive. Oil-paper insulation withdifferent concentrations of corrosive sulfur is investigated by a corrosion experiment to understand the effect of depo-sition on characteristic of partial discharge. Windings are unfolded after experiment and surface of copper and insula-tion paper are observed and analyzed. Partial discharge inception voltage（PDIV） of oil-paper insul

ation samples ismeasured and corresponding partial discharge signals are recorded. Three types of spectrograms called q-φ

qmax

（φ）and H

qave

（φ） are obtained. The results show that the deposition is Cu

S. Copper winding would be corroded more if sul-fur concentration in oil is higher. And corresponding PDIV of windings is decreased. On the other hand

corrosionleads to the characteristics change of PD

the increase of discharge

the widening of discharge phase and the easiermovement of discharge phase. Cu

S substance is considered be the main reason for the change of characteristic of PD.

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