Study on the Inter Turn Voltage and Resonance of Transformer Windings Under VFTO

LIU Yu; LU Hailiang; XU Bichuan; LIU Wenbo; CHEN Xiaoyue; XU Yang; LAN Lei; WEN Xishan

doi:10.13296/j.1001-1609.hva.2018.01.019

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Study on the Inter Turn Voltage and Resonance of Transformer Windings Under VFTO

更新时间：2025-04-26

- Study on the Inter Turn Voltage and Resonance of Transformer Windings Under VFTO
- High VoltageApparatus Vol. 54, Issue 1, Pages: 131-136(2018)
- 作者机构：
  
  武汉大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.01.019
  CLC： TM41
- Published：2018
- 稿件说明：
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[1]刘玉,鲁海亮,徐碧川,刘文博,陈小月,徐旸,蓝磊,文习山.VFTO作用下变压器绕组匝间电压及谐振研究[J].高压电器,2018,54(01):131-136.

LIU Yu, LU Hailiang, XU Bichuan, et al. Study on the Inter Turn Voltage and Resonance of Transformer Windings Under VFTO[J]. High voltageapparatus, 2018, 54(1): 131-136.
[1]刘玉,鲁海亮,徐碧川,刘文博,陈小月,徐旸,蓝磊,文习山.VFTO作用下变压器绕组匝间电压及谐振研究[J].高压电器,2018,54(01):131-136. DOI： 10.13296/j.1001-1609.hva.2018.01.019.

LIU Yu, LU Hailiang, XU Bichuan, et al. Study on the Inter Turn Voltage and Resonance of Transformer Windings Under VFTO[J]. High voltageapparatus, 2018, 54(1): 131-136. DOI： 10.13296/j.1001-1609.hva.2018.01.019.

摘要

采用基本电路元件构成的等效电路计算变压器绕组匝间电压分布

分析典型500kV GIS变电站中的VFTO波形和2种极端情况的波形作用下

典型500kV芯式变压器匝间电压分布的一般规律

得到不同VFTO波形下匝间电压占入口电压的百分比为4%

并判断匝间绝缘的安全裕度

为工程应用提供参考。同时通过分析VFTO过电压波幅频特性

得到了绕组主要的谐振频率

并采用单一频率的正弦电压分析绕组谐振

研究谐振电压幅值和绝缘易受威胁的线匝位置

得到绕组上振荡电压幅值非常大

电压分布发生变化

易对绕组绝缘产生威胁。

Abstract

The equivalent circuit consisting of basic circuit elements is used to calculate the inter-turn voltagedistribution of transformer windings

this paper summarizes the general rule of inter-turn voltage distribution intypical 500kV core transformers under a typical 500kV GIS substation VFTO waveform and two waveforms inextreme cases

then the inter-turn voltage percentage of entrance voltage under different VFTO waveform is gotten

which is 4%

and the inter turn insulation safety margin is analyzed

which provides a reference forengineering application. At the same time

by analyzing frequency characteristics of VFTO

the main resonancefrequencies of transformer windings are obtained

the resonant voltage and vulnerable turn insula

tion are analyzedwith a single frequency sinusoidal voltage

the oscillation voltage is very high

and voltage distribution in windings ischanged

which is liable to threaten the insulation of the winding.

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