Flexible combined grounding modes of large hydro-generators

WU Xiuhan; LI Chen; WEI Yang; SUN Yue; LI Guangyao; LUO Jinsong; GAO Ziwei; SHEN Hongwan; GUI Lin

doi:10.11930/j.issn.1004-9649.202510035

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Flexible combined grounding modes of large hydro-generators

更新时间：2026-04-30

- Flexible combined grounding modes of large hydro-generators
- Vol. 59, Issue 4, Pages: 105-113(2026)
- 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：
- DOI：10.11930/j.issn.1004-9649.202510035
  CLC：
- Online First：20 April 2026，
  
  Published：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

1王维俭. 电器主设备继电保护原理与应用[M]. 2版. 北京: 中国电力出版社, 2002.

2王维俭, 王祥珩, 王赞基. 大型发电机变压器内部故障分析与继电保护[M]. 北京: 中国电力出版社, 2006.

3要焕年, 曹梅月. 电力系统谐振接地[M]. 北京: 中国电力出版社, 2009.

4BRAUN D, KOEPPL G S. Intermittent line-to-ground faults in generator stator windings and consequences on neutral grounding[J]. IEEE Transactions on Power Delivery, 2010, 25 (2): 876- 881.

5BROWN P G, JOHNSON I B, STEVENSON J R. Generator neutral grounding some aspects of application for distribution transformer with secondary resistor and resonant types[J]. IEEE Transactions on Power Apparatus and Systems, 1978, 97 (3): 683- 694.

6Surge Protective Devices Committee. IEEE guide for the application of neutral grounding in electrical utility systems part II: grounding of synchronous generator systems: IEEE Std C62.92. 2-1989(R2005) [S]. New York, USA: IEEE Power Engineering Society, 2005.

7PILLAI P, PIERCE A, BAILEY B, et al. Grounding and ground fault protection of multiple generator installations on medium-voltage industrial and commercial systems - part 2: grounding methods working group report[C]//Conference Record of the 2003 Annual Pulp and Paper Industry Technical Conference, 2003. IEEE, 2003.

8周烺, 刘建政, 张琦雪, 等. 大型水轮发电机消弧线圈接地方式下的注入式定子接地保护新方案[J]. 中国电力, 2021, 54 (12): 112- 120.

ZHOU Lang, LIU Jianzheng, ZHANG Qixue, et al. A new method for stator ground fault protection with voltage injection on large hydro generators grounded by arc suppression coils[J]. Electric Power, 2021, 54 (12): 112- 120.

9张琦雪, 曾祥君, 徐金, 等. 大型发电机中性点组合型接地方式的分析与探讨[J]. 电力自动化设备, 2018, 38 (11): 217- 222.

ZHANG Qixue, ZENG Xiangjun, XU Jin, et al. Analysis and discussion on combination-type grounding scheme for large-sized generator[J]. Electric Power Automation Equipment, 2018, 38 (11): 217- 222.

10贾文超, 曹嵩. 大型水电机组组合型接地方式参数优化设计[J]. 电力自动化设备, 2022, 42 (4): 79- 85.

JIA Wenchao, CAO Song. Parameter optimization design of combination-type grounding mode for large-sized hydropower units[J]. Electric Power Automation Equipment, 2022, 42 (4): 79- 85.

11殷建刚, 彭丰, 王维俭. 合理配置发电机中性点接地方式[J]. 电力设备, 2001, 2 (4): 67- 70.

YIN Jiangang, PENG Feng, WANG Weijian. Rational selection of generator neutral grounding scheme[J]. Electric Equipment, 2001, 2 (4): 67- 70.

12张琦雪, 陈佳胜, 沈全荣. 大型发电机中性点配电变压器电阻接地选型设计[J]. 中国电机工程学报, 2007, 27 (S): 89- 93.

ZHANG Qixue, CHEN Jiasheng, SHEN Quanrong. Lectotype and design of neutral grounding transformer and load resistor for large- sized generator[J]. Proceedings of the CSEE, 2007, 27 (S): 89- 93.

13张丹丹, 陈俊钦, 阳瑞霖. 巨型水轮发电机中性点新型接地方式分析[J]. 高压电器, 2023, 59 (1): 1- 7.

ZHANG Dandan, CHEN Junqin, YANG Ruilin. Analysis of new grounding mode for neutral point of giant hydro-generator[J]. High Voltage Apparatus, 2023, 59 (1): 1- 7.

14张琦雪, 王祥珩, 陈佳胜, 等. 组合型接地方式对注入式定子接地保护的影响[J]. 中国电力, 2018, 51 (11): 96- 103.

ZHANG Qixue, WANG Xiangheng, CHEN Jiasheng, et al. Influence of the combination-type grounding scheme on voltage-injected stator ground fault protection[J]. Electric Power, 2018, 51 (11): 96- 103.

15张琦雪, 陈佳胜, 陈俊, 等. 大型发电机注入式定子接地保护判据的改进[J]. 电力系统自动化, 2008, 32 (3): 66- 69.

ZHANG Qixue, CHEN Jiasheng, CHEN Jun, et al. Improvement on criterions of stator earth fault protection with voltage injection for large-sized generator[J]. Automation of Electric Power Systems, 2008, 32 (3): 66- 69.

16赵思腾. 大型水轮发电机中性点接地变优化设计研究[D]. 北京: 清华大学, 2020.

ZHAO Siteng. Research on optimal design of neutral grounding transformer for large hydro-generator[D]. Beijing: Tsinghua University, 2020.

17曹嵩. 大型发电机组合型接地方式优化研究[D]. 北京: 华北电力大学, 2022.

CAO Song. Optimization research on combination type grounding scheme for large-sized generator[D]. Beijing: North China Electric Power University, 2022.

18任良均. 大中型水轮发电机中性点配电变压器电阻接地方式设计选型[J]. 四川水力发电, 2025, 44 (2): 10- 13.

REN Liangjun. Design and selection of resistance grounding mode for neutral distribution transformer of large and medium-sized hydroelectric generators[J]. Sichuan Hydro Power, 2025, 44 (2): 10- 13.

19刘亚青, 张丹丹, 朱钊, 等. 巨型水轮发电机中性点接地装置加电抗对中性点位移电压影响的研究[J]. 大电机技术, 2020, (3): 47- 50.

LIU Yaqing, ZHANG Dandan, ZHU Zhao, et al. Research on the effect of the reactance of the neutral point grounding device of the giant hydro-generator on the neutral point dis placement voltage[J]. Large Electric Machine and Hydraulic Turbine, 2020, (3): 47- 50.

20党晓强, 邰能灵, 王海田, 等. 大型水轮发电机定子接地方式及其继电保护的相关问题分析[J]. 电力自动化设备, 2012, 32 (7): 25- 29.

DANG Xiaoqiang, TAI Nengling, WANG Haitian, et al. Analysis of the stator grounding method of large hydro-generators and related problems of relay protection[J]. Electric Power Automation Equipment, 2012, 32 (7): 25- 29.

21白珈宁, 桂林, 刘苗, 等. 可变速抽蓄机组转子绕组新型主保护方案性能分析[J]. 中国电力, 2024, 57 (10): 208- 217.

BAI Jianing, GUI Lin, LIU Miao, et al. Performance analysis of new main protection scheme for rotor winding of variable speed pumped storage units[J]. Electric Power, 2024, 57 (10): 208- 217.

22宋全林, 桂林, 党晓强. 水轮发电机定子单相接地的继电保护技术[J]. 四川电力技术, 2011, 34 (1): 91- 94.

SONG Quanlin, GUI Lin, DANG Xiaoqiang. Relay protection technology for single-phase grounding in hydro-generator stators[J]. Sichuan Electric Power Technology, 2011, 34 (1): 91- 94.

23伍利, 彭金宁, 姚李孝, 等. 大型发电机组注入式定子接地保护调试与整定[J]. 中国电力, 2013, 46 (9): 92- 95, 106.

WU Li, PENG Jinning, YAO Lixiao, et al. Commissioning and setting of voltage-injection stator ground fault protection for large sized generator[J]. Electric Power, 2013, 46 (9): 92- 95, 106.

24吴江雄, 郑茂然, 王欣, 等. 基于暂态零序导纳值的谐振接地系统单相接地故障选线方法[J]. 南方电网技术, 2024, 18 (11): 58- 66.

WU Jiangxiong, ZHENG Maoran, WANG Xin, et al. Single-phase grounding fault line selection method for resonant grounding system based on transient zero-sequence admittance value[J]. Southern Power System Technology, 2024, 18 (11): 58- 66.

25李晓波, 彭超红, 袁璐健, 等. 融合两阶段暂态信息的灵活接地系统高阻接地故障选线研究[J]. 电力系统保护与控制, 2025, 53 (23): 75- 89.

LI Xiaobo, PENG Chaohong, YUAN Lujian, et al. Research on fault line selection method for high-resistance grounding faults in flexible grounding systems based on integration of two-stage transient information[J]. Power System Protection and Control, 2025, 53 (23): 75- 89.

26李汝良, 李义翔, 王祥珩. 大型发电机定子中性点接地暂态研究[J]. 电力自动化设备, 1999, 19 (4): 1- 5.

LI Ruliang, LI Yixiang, WANG Xiangheng. The transient state research of generator stator neutral grounding schemes[J]. Electric Power Automation Equipment, 1999, 19 (4): 1- 5.

27毕大强, 王祥珩, 王善铭, 等. 大型水轮发电机定子单相接地故障的暂态仿真[J]. 电力系统自动化, 2002, (15): 39- 44.

BI Daqiang, WANG Xiangheng, WANG Shanming, et al. Transient simulation for the stator ground fault of large-sized hydro-generator[J]. Automation of Electric Power Systems, 2002, (15): 39- 44.

28汪雁, 舒廉甫. 水轮发电机中性点经消弧线圈接地暂态过电压的研究[J]. 电网技术, 2000, 24 (2): 14- 16.

WANG Yan, SHU Lianpu. Transient over-voltage of hydro generator with resonant grounding neutral[J]. Power System Technology, 2000, 24 (2): 14- 16.

29张琦雪, 王祥珩, 王维俭. 大型水轮发电机定子中性点高阻接地暂态分析[J]. 电网技术, 2004, 28 (1): 30- 33.

ZHANG Qixue, WANG Xiangheng, WANG Weijian. Transient analysis on large hydro-generator with high resistance grounding[J]. Power System Technology, 2004, 28 (1): 30- 33.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

No data

Related Author

No data

Related Institution

No data

AI问答

⁰