Discussion on Preload Voltage Time in 750 kV Transformer Long-duration Induced AC Voltage Test

L Jing-shun1; ZHANG Hong-liang2; WANG Xuan2; HAO Xiao-hong2; FAN Di-ming1

doi:10.13296/j.1001-1609.hva.2012.12.020

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Discussion on Preload Voltage Time in 750 kV Transformer Long-duration Induced AC Voltage Test

更新时间：2025-04-26

- Discussion on Preload Voltage Time in 750 kV Transformer Long-duration Induced AC Voltage Test
- High VoltageApparatus Vol. 48, Issue 12, Pages: 98-104(2012)
- 作者机构：
  
  1. 甘肃电力科学研究院
  2. 兰州理工大学电气工程与信息工程学院
  3. 甘肃电力科学研究院兰州理工大学电气工程与信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2012.12.020
  CLC： TM406
- Published：2012
- 稿件说明：
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[1]吕景顺,张宏亮,王烜,郝晓弘,范迪铭.750kV变压器长时感应电压试验预加电压时间的探讨[J].高压电器,2012,48(12):98-104.

L Jing-shun1, ZHANG Hong-liang2, WANG Xuan2, et al. Discussion on Preload Voltage Time in 750 kV Transformer Long-duration Induced AC Voltage Test[J]. High voltageapparatus, 2012, 48(12): 98-104.
[1]吕景顺,张宏亮,王烜,郝晓弘,范迪铭.750kV变压器长时感应电压试验预加电压时间的探讨[J].高压电器,2012,48(12):98-104. DOI： 10.13296/j.1001-1609.hva.2012.12.020.

L Jing-shun1, ZHANG Hong-liang2, WANG Xuan2, et al. Discussion on Preload Voltage Time in 750 kV Transformer Long-duration Induced AC Voltage Test[J]. High voltageapparatus, 2012, 48(12): 98-104. DOI： 10.13296/j.1001-1609.hva.2012.12.020.

摘要

随着750 kV电网覆盖范围的逐步扩大

对比1 000 kV特高压变压器长时感应电压试验标准

中国早期750 kV变压器长时感应电压试验要求较为宽松。调整长时感应电压试验预加电压时间是解决这一问题的有效措施。笔者基于威布尔分布法

根据已有特高压变压器基本绝缘结构试验数据

确定了超、特高压器基本绝缘结构局部放电概率在短时间范围内的扩大威布尔分布参数。结合中国750 kV工频过电压水平

利用油—屏障绝缘局部放电概率扩大威布尔计算公式

同时考虑预加电压、安全系数和局放控制概率水平

对750 kV长时感应电压试验预加电压时间进行了计算和分析

提出了相应预加电压时间的参考值。。

Abstract

Compared with standards of 1 000 kV UHV transformer long-duration induced AC voltage test（ACLD）

early standards of 750 kV transformer long-duration induced AC voltage test are relative loose in the domestic.It is an effective method to solve this problem that adjusting the preload voltage time in long-duration induced voltage test.Based on weibull distribution method and the experiment data of basic insulation structures in UHV transformer

this paper calculates the expanded weibull distribution parameters for the partial discharge probability of basic insulation structures in a short period of time.Considering the level of 750 kV temporary overvoltage

preload voltage in 750 kV transformer ACLD are then studied with expanded weibull distribution.Finally

considering the factors of full test voltage

safety factor and controlled partial discharge probability

preload voltage time in 750 kV transformer ACLD are presented.

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