Investigation to Power Frequency Overvoltages of Wubei-Tulufan-Hami 750kV Transmission System

LIU Qing~1; LI Shan~2; FAN Xu-hua~2; ZHANG Zeng-qiang~3; CHEN Wen-tao~2

doi:10.13296/j.1001-1609.hva.2011.06.004

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Investigation to Power Frequency Overvoltages of Wubei-Tulufan-Hami 750kV Transmission System

更新时间：2025-04-26

- Investigation to Power Frequency Overvoltages of Wubei-Tulufan-Hami 750kV Transmission System
- High VoltageApparatus Vol. 47, Issue 6, Pages: 8-12(2011)
- 作者机构：
  
  1. 西安科技大学
  2. 新疆电力科学研究院
  3. 新疆电力公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2011.06.004
  CLC： TM86
- Published：2011
- 稿件说明：
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[1]刘青,李山,范旭华,张增强,陈文涛.乌北—吐鲁番—哈密750kV输电线路工频过电压研究[J].高压电器,2011,47(06):8-12.

LIU Qing~1, LI Shan~2, FAN Xu-hua~2, et al. Investigation to Power Frequency Overvoltages of Wubei-Tulufan-Hami 750kV Transmission System[J]. High voltageapparatus, 2011, 47(6): 8-12.
[1]刘青,李山,范旭华,张增强,陈文涛.乌北—吐鲁番—哈密750kV输电线路工频过电压研究[J].高压电器,2011,47(06):8-12. DOI： 10.13296/j.1001-1609.hva.2011.06.004.

LIU Qing~1, LI Shan~2, FAN Xu-hua~2, et al. Investigation to Power Frequency Overvoltages of Wubei-Tulufan-Hami 750kV Transmission System[J]. High voltageapparatus, 2011, 47(6): 8-12. DOI： 10.13296/j.1001-1609.hva.2011.06.004.

摘要

超高压电网的工频过电压是确定系统绝缘水平的重要依据。750 kV输电线路电阻和电感较小、分布电容大

线路较长

工频过电压比一般超高压线路更为严重。笔者以乌北—吐鲁番—哈密750 kV输电系统为背景

利用电磁暂态程序（EMTP）计算了线路的潜供电流、恢复电压

以及各种运行方式下的工频过电压

并对线路两端高抗限制工频过电压的效果进行了研究。研究表明

乌北—吐鲁番线路、吐鲁番—哈密线路的恢复电压和潜供电流符合工程要求

高抗中性点小电抗取值合适

保证了单相重合闸的成功率。线路两端装设电抗器后

工频过电压符合中国关于超高压输电线路工频过电压的要求。

Abstract

Power frequency overvoltage is an important index for evaluating the insulation grade of extra high voltage power system.Because of the longer length and the larger distributing capacitance of 750 kV transmission line

the power frequency overvoltage is more serious.In this paper

for the Wubei-Tulufan-Hami 750 kV transmission system

the secondary arc current

the recovery voltage

and the power frequency overvoltages in different conditions are calculated by Electro Magnetic Transient Program（EMTP）.The protective effect of shunt reactor is also analyzed.Theoretical analysis and simulation illustrate that the value of neutral reactance is suitable

which ensures the success of single-phase auto-reclosing;and the power frequency overvoltages meet the Chinese regulations after the reactors are installed at both ends of the transmission line.

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