Influence of Lowering Rated Voltage or Residual Voltage of MOA on Canceling the Pre-insert Closing Resistor in 750 kV Circuit Breaker

LOU Ying; LI Zhenqiang; HE Huiwen; ZHA Zhipeng

doi:10.13296/j.1001-1609.hva.2017.06.010

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Influence of Lowering Rated Voltage or Residual Voltage of MOA on Canceling the Pre-insert Closing Resistor in 750 kV Circuit Breaker

更新时间：2025-04-26

- Influence of Lowering Rated Voltage or Residual Voltage of MOA on Canceling the Pre-insert Closing Resistor in 750 kV Circuit Breaker
- High VoltageApparatus Vol. 53, Issue 6, Pages: 56-60+66(2017)
- 作者机构：
  
  中国电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2017.06.010
  CLC： TM75;TM561;TM862
- Published：2017
- 稿件说明：
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[1]娄颖,李振强,何慧雯,查志鹏.降低避雷器额定电压或残压对取消750kV线路断路器合闸电阻的影响[J].高压电器,2017,53(06):56-60+66.

LOU Ying, LI Zhenqiang, HE Huiwen, et al. Influence of Lowering Rated Voltage or Residual Voltage of MOA on Canceling the Pre-insert Closing Resistor in 750 kV Circuit Breaker[J]. High voltageapparatus, 2017, 53(6): 56-60+66.
[1]娄颖,李振强,何慧雯,查志鹏.降低避雷器额定电压或残压对取消750kV线路断路器合闸电阻的影响[J].高压电器,2017,53(06):56-60+66. DOI： 10.13296/j.1001-1609.hva.2017.06.010.

LOU Ying, LI Zhenqiang, HE Huiwen, et al. Influence of Lowering Rated Voltage or Residual Voltage of MOA on Canceling the Pre-insert Closing Resistor in 750 kV Circuit Breaker[J]. High voltageapparatus, 2017, 53(6): 56-60+66. DOI： 10.13296/j.1001-1609.hva.2017.06.010.

摘要

目前中国西北地区已投运的750 kV工程避雷器配置基本上是采用750 kV母线侧避雷器额定电压600 kV、线路侧避雷器额定电压648 kV。绝大多数750 kV工程线路断路器装有570

00Ω合闸电阻。根据工频过电压的差异化研究结果

母线侧和线路侧避雷器额定电压在一定范围内均可以进一步降低。避雷器性能提高

避雷器操作冲击电流残压降低

750 kV线路合闸操作过电压水平会相应降低

有利于取消750 kV线路断路器合闸电阻。文中对750 kV工程避雷器额定电压或残压降低后的合闸操作过电压进行了研究

结合操作过电压闪络率的计算

提出了降低避雷器额定电压或残压后取消750 kV线路断路器合闸电阻的适用范围。

Abstract

At present

the 750 kV projects in northwest region of China usually are equipped with the MOAs with rated voltage of 600 kV at bus bar side and 648 kV at transmission line side.Almost all the circuit breakers in the 750 kV transmission lines have pre-inset closing resistors

which resistance is 570

00 Ω.According to the research on the differentiation of the power frequency overvoltage

the rated voltage of MOA at both bus bar side and line side can be further reduced in a certain range.Improvement of MOA performance can lower the closing overvoltage

accordingly the residual voltage of MOA will reduce

ich is in favor of canceling the closing resistor.In this paper

the closing overvoltage after reduction of the rated voltage or residual voltage of the MOA for 750 kV projects is investigated.Based on the calculation of the flashover rate due to closing overvoltage

the application range of canceling the closing resistor is suggested.

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