Page 109 - 《中国电力》2026年第4期

第 59 卷 第 4 期 Vol. 59, No. 4
2026 年 4 月 ELECTRIC POWER Apr. 2026

引用格式：吴修韩, 李琛, 魏扬, 等. 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.
Citation: WU Xiuhan, LI Chen, WEI Yang, et al. Flexible combined grounding modes of large hydro-generators[J]. Electric Power, 2026, 59(4):
105−113.

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 ，
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罗金嵩 ，高紫薇 ，沈红万 ，桂林 2
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(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)
Flexible combined grounding modes of large hydro-generators
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WU Xiuhan , LI Chen , WEI Yang , SUN Yue , LI Guangyao ,
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LUO Jinsong , GAO Ziwei , SHEN Hongwan , GUI Lin 2
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(1. China Yangtze Power Co., Ltd., Yichang 443000, China; 2. State Key Laboratory of Power System Operation and Control (Department
of Electrical Engineering, Tsinghua University), Beijing 100084, China)

Abstract: Single-phase grounding fault is the most common Analysis and Optimal Design of Large Generator Under
fault causing insulation damage to generator stator windings. Condition of Capacitance Current Increasing Rapidly,
The grounding transformer high-resistance grounding mode No.52077115) and the Research Project of China Yangtze
widely used in China cannot address the problem of excessive Power Co., Ltd. (Flexible Grounding Configuration Study for
grounding fault current induced by the increase in generator-to- Large Hydro-generators, No.Z212402013).
ground capacitive current, while the combined grounding mode Keywords: generator neutral point grounding; combined
has the limitation of poor parameter adaptability in its grounding mode; stator single-phase grounding fault; grounding
application to large hydropower stations with different unit device parameter design; restrike arc transient overvoltage
models. This paper proposes a flexible combined grounding
mode, and takes the generators of five models in a hydropower 摘 要：单相接地故障是发电机定子绕组绝缘损坏最常
station as the research object to optimize the design of their 见的故障，国内广泛应用的接地变高阻接地方式无法应
grounding devices, which verifies the feasibility of the flexible 对发电机对地电容电流增大导致的接地故障电流过大问
combined grounding device. This grounding mode can not only 题，而组合型接地方式则在机组型号不同的大型水电站
effectively limit key indicators such as single-phase grounding 应用中存在参数适配性较差的局限。提出一种灵活组合
fault current, but also make up the deficiency in the universal 型接地方式，并以某水电站 5 种机型发电机为分析对象，
adaptabilityof grounding device parameters, significantly 对其接地装置进行优化设计，验证灵活组合型接地装置
reduce the costs and pressures of equipment installation and 的可行性。结果表明，该方式既能有效限制单相接地故
spare parts purchase and storage, and is of great significance to 障电流等关键指标，又能弥补接地装置参数通用适配的
ensuring the operational safety of generators in large 短板，显著降低设备安装、备品购储的成本和压力，对
hydropower stations. 于保障大型水电站发电机的运行安全具有重要意义。
This work is supported by the National Natural Science 关键词：发电机中性点接地；组合型接地方式；定子单
Foundation of China (Research on Stator Ground Fault 相接地故障；接地装置参数设计；重燃弧暂态过电压
DOI：10.11930/j.issn.1004-9649.202510035

收稿日期：2025−10−14； 修回日期：2026−01−19。
基金项目：国家自然科学基金资助项目（电容电流剧增条 0 引言
件下大型发电机定子接地故障分析与优化设计研究，5207
7115）；中国长江电力股份有限公司科研项目（大型水轮 大型发电机的中性点接地方式主要有高阻接
发电机灵活组合型接地方式研究与应用，Z212402013）。 地和消弧线圈接地（又称谐振接地）2 种，二者

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