大型水轮发电机灵活组合型接地方式

吴修韩; 李琛; 魏扬; 孙悦; 李光耀; 罗金嵩; 高紫薇; 沈红万; 桂林

doi:10.11930/j.issn.1004-9649.202510035

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大型水轮发电机灵活组合型接地方式

新型电网 | 更新时间：2026-04-30

- 大型水轮发电机灵活组合型接地方式
- Flexible combined grounding modes of large hydro-generators
- 中国电力 2026年59卷第4期页码：105-113
- 作者机构：
  
  1. 中国长江电力股份有限公司,湖北,宜昌,443000
  2. 新型电力系统运行与控制全国重点实验室（清华大学电机工程与应用电子技术系）,北京,100084
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目（电容电流剧增条件下大型发电机定子接地故障分析与优化设计研究，52077115）;中国长江电力股份有限公司科研项目（大型水轮发电机灵活组合型接地方式研究与应用，Z212402013）。
- DOI：10.11930/j.issn.1004-9649.202510035
  中图分类号：
- 网络首发：2026-04-20，
  
  纸质出版：2026
- 稿件说明：
移动端阅览
吴修韩, 李琛, 魏扬, 孙悦, 李光耀, 罗金嵩, 高紫薇, 沈红万, 桂林. 大型水轮发电机灵活组合型接地方式[J]. 中国电力, 2026, 59(4): 105-113.

WU Xiuhan, LI Chen, WEI Yang, et al. Flexible combined grounding modes of large hydro-generators[J]. 2026, 59(4): 105-113.
吴修韩, 李琛, 魏扬, 孙悦, 李光耀, 罗金嵩, 高紫薇, 沈红万, 桂林. 大型水轮发电机灵活组合型接地方式[J]. 中国电力, 2026, 59(4): 105-113. DOI： 10.11930/j.issn.1004-9649.202510035.

WU Xiuhan, LI Chen, WEI Yang, et al. Flexible combined grounding modes of large hydro-generators[J]. 2026, 59(4): 105-113. DOI： 10.11930/j.issn.1004-9649.202510035.

摘要

单相接地故障是发电机定子绕组绝缘损坏最常见的故障，国内广泛应用的接地变高阻接地方式无法应对发电机对地电容电流增大导致的接地故障电流过大问题，而组合型接地方式则在机组型号不同的大型水电站应用中存在参数适配性较差的局限。提出一种灵活组合型接地方式，并以某水电站5种机型发电机为分析对象，对其接地装置进行优化设计，验证灵活组合型接地装置的可行性。结果表明，该方式既能有效限制单相接地故障电流等关键指标，又能弥补接地装置参数通用适配的短板，显著降低设备安装、备品购储的成本和压力，对于保障大型水电站发电机的运行安全具有重要意义。

Abstract

Single-phase grounding fault is the most common fault causing insulation damage to generator stator windings. The grounding transformer high-resistance grounding mode widely used in China cannot address the problem of excessive grounding fault current induced by the increase in generator-to-ground capacitive current

while the combined grounding mode has the limitation of poor parameter adaptability in its application to large hydropower stations with different unit models. This paper proposes a flexible combined grounding mode

and takes the generators of five models in a hydropower station as the research object to optimize the design of their grounding devices

which verifies the feasibility of the flexible combined grounding device. This grounding mode can not only effectively limit key indicators such as single-phase grounding fault current

but also make up the deficiency in the universal adaptabilityof grounding device parameters

significantly reduce the costs and pressures of equipment installation and spare parts purchase and storage

and is of great significance to ensuring the operational safety of generators in large hydropower stations.

关键词

Keywords

references

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