On-line Monitoring of Transformer Winding Deformation Based on Identification of Leakage Inductance

SHEN Yu1; RUAN Ling1; LUO Wei1; CAO Rui2; LUO Yong-fen3; LI Yan-ming3

doi:10.13296/j.1001-1609.hva.2012.12.010

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On-line Monitoring of Transformer Winding Deformation Based on Identification of Leakage Inductance

更新时间：2025-04-26

- On-line Monitoring of Transformer Winding Deformation Based on Identification of Leakage Inductance
- High VoltageApparatus Vol. 48, Issue 12, Pages: 44-48(2012)
- 作者机构：
  
  1. 湖北省电力公司电力试验研究院
  2. 西安高压电器研究院有限责任公司
  3. 西安交通大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2012.12.010
  CLC： TM41
- Published：2012
- 稿件说明：
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[1]沈煜,阮羚,罗维,曹蕤,罗勇芬,李彦明.基于漏感抗在线识别的变压器绕组变形监测技术的研究[J].高压电器,2012,48(12):44-48.

SHEN Yu1, RUAN Ling1, LUO Wei1, et al. On-line Monitoring of Transformer Winding Deformation Based on Identification of Leakage Inductance[J]. High voltageapparatus, 2012, 48(12): 44-48.
[1]沈煜,阮羚,罗维,曹蕤,罗勇芬,李彦明.基于漏感抗在线识别的变压器绕组变形监测技术的研究[J].高压电器,2012,48(12):44-48. DOI： 10.13296/j.1001-1609.hva.2012.12.010.

SHEN Yu1, RUAN Ling1, LUO Wei1, et al. On-line Monitoring of Transformer Winding Deformation Based on Identification of Leakage Inductance[J]. High voltageapparatus, 2012, 48(12): 44-48. DOI： 10.13296/j.1001-1609.hva.2012.12.010.

摘要

基于短路阻抗法原理研究了对绕组变形的在线监测技术和实验室研究平台。提出了一种快速计算变压器绕组漏电抗的计算方法:在电流峰值处

直接由电压差和电流比值得到漏电阻;在电流过零处

直接由电压差和电流微分的比值得到漏电感;对一、二次电压先在硬件电路中先进行减法放大到采集卡的输入极值附近

再采集

将算法的分辨率几近提高到采集卡的最大精度。研制的监测系统

在实验室绕组变形研究平台上进行试验研究并初步提出变形判据

并在现场得到应用。研究结果表明

这为现场变压器在线监测绕组故障提供了一种有效的方法。

Abstract

An on-line monitoring technology of transformer winding deformation and corresponding experimental platform were presented according to the theory of short-circuit impedance analysis.Consequently

a method for rapidly computing the leakage reactance from transformer winding was proposed.The leakage resistance is obtained from the ratio of voltage difference to current at the peak of current

and the leakage inductance is also obtained from the ratio of voltage difference to differential of current when current is zero.The voltage difference of primary and secondary winding is magnified near the input limit of AD acquisition card with hardware before sampled

thus the resolution of the algorithm is increased to the maximum precision of the card.The present on-line monitoring system was tested on the experimental platform

and a criterion was also proposed for judging the state of winding.The test and practical application results verify the effectiveness of the present on-line monitoring system.

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