Measures on improving the ground protection action reliability of generator stator

DENG Zu-qian

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Measures on improving the ground protection action reliability of generator stator

更新时间：2025-11-18

- Measures on improving the ground protection action reliability of generator stator
- Vol. 31, Issue 4, Pages: 37-40+50(2011)
- 作者机构：
  
  广州恒运企业集团有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM862
- Published：2011
- 稿件说明：
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[1]邓祖前.提高发电机定子接地保护动作可靠性的措施[J].湖南电力,2011,31(04):37-40+50.

DENG Zu-qian. Measures on improving the ground protection action reliability of generator stator[J]. 2011, 31(4): 37-40+50.
[1]邓祖前.提高发电机定子接地保护动作可靠性的措施[J].湖南电力,2011,31(04):37-40+50. DOI：

DENG Zu-qian. Measures on improving the ground protection action reliability of generator stator[J]. 2011, 31(4): 37-40+50. DOI：

摘要

某电厂210 MW汽轮发电机组带191 MW负荷运行

发电机定子接地三次谐波保护动作发信

基波零序电压变化较大。通过对采样数据的分析

否定了定子绕组单相接地的可能

考虑到基波零序电压整定较灵敏

退出了该保护的功能压板

避免了保护误动切机事故。并且从TV一次断线闭锁保护的缺点、保护原理的确定、变比修正系数的计算、TV一次绕组接地等方面

提出了提高发电机定子接地保护动作可靠性的措施。

Abstract

Stator ground protection based on the third harmonic transimitted and zero-sequence voltage changed greatly when 210 MW gas-generator was working with 191 MW load.The analysis of sampled data indicated single-phase ground is impossible.Being considered of fundamental zero-sequence voltage sensitive setting

the faction plate of the protection exited to avoid cutting machine accident of the protection malfunction.Measures of improving the reliability of generator stator ground protection action was put forward based on the defect of TV break blocking

the determination of protection principle

calculation of variable fixed coefficient and TV grounding of the primary winding.

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Related Institution

湖南常德电业局湖南常德415000

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湖南岳阳414014

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