定子并联支路对主磁场不对称度的弱化效果评估

doi:10.11930/j.issn.1004-9649.202404088

中国电力 ›› 2025, Vol. 58 ›› Issue (5): 189-198.DOI: 10.11930/j.issn.1004-9649.202404088

• 新型电网 • 上一篇

定子并联支路对主磁场不对称度的弱化效果评估

陈冰兵(), 武玉才(), 纪璇(), 朱新凯()

河北省绿色高效电工新材料与设备重点实验室（华北电力大学），河北保定　071003

收稿日期:2024-04-22 发布日期:2025-05-30 出版日期:2025-05-28
作者简介:
陈冰兵（1999），男，硕士研究生，从事汽轮发电机组状态监测与故障诊断研究，E-mail：18091603060@163.com
武玉才（1982），男，博士，教授，从事大型电气设备状态监测与故障诊断研究，E-mail：wuyucaincepu@163.com
纪璇（1982），女，通信作者，硕士，助理工程师，从事大型电机在线检测与故障诊断研究，E-mail：jixuan_viv@163.com
基金资助:
国家自然科学基金资助项目（深度调峰火电机组热致伸缩效应诱发转子绝缘劣化的演变机理及靶向防御，52277048；新能源汇集站分布式调相机动态工况下转子复杂振动特性及轴系损伤机理，52307053）。

Evaluation of Weakening Effect of Stator Parallel Branch Circuit on Main Field Asymmetry

CHEN Bingbing(), WU Yucai(), JI Xuan(), ZHU Xinkai()

Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment (North China Electric Power University), Baoding 071003, China

Received:2024-04-22 Online:2025-05-30 Published:2025-05-28
Supported by:
This work is supported by National Natural Science Foundation of China (Evolution Mechanism and Targeted Defense of Rotor Insulation Deterioration Induced by Thermal Expansion Effect of Thermal Power Units With Deep Peak Regulation, No.52277048; Complex Rotor Vibration Characteristics and Shafting Damage Mechanisms of Distributed Condensers in New Energy Collection Station Under Dynamic Conditions, No.52307053).

摘要/Abstract

摘要：

转子绕组匝间短路是汽轮发电机的一种弱特征电气故障，使得故障检测较为困难。本文研究了汽轮发电机定子绕组并联支路内部环流对转子绕组匝间短路所产生的不对称磁场的弱化效应，推导了故障状态下励磁磁场表达式，得到定子绕组并联支路环流表达式，以及环流所产生的磁场表达式，发现了环流磁场对原本不对称磁场的抵消作用。以一台300 MW汽轮发电机为例进行有限元仿真，证明了汽轮发电机定子绕组并联支路结构对转子绕组匝间短路故障特征的弱化效应，研究结论有助于分析转子绕组匝间短路故障特征的外在表象、原因，也为故障诊断阶段的特征提取提供了理论支持。

关键词: 汽轮发电机, 转子绕组匝间短路, 诊断, 并联支路环流法, 不对称磁场

Abstract:

The short circuit between turns of the rotor winding is a weak characteristic electrical fault of the turbine generator, which makes the fault detection difficult. This paper investigates the weakening effect of the circulating magnetic field inside the parallel branch of the stator winding of a turbine generator on the asymmetric magnetic field generated by the rotor winding turn-to-turn short-circuit, derives the expression of the excitation magnetic field under the fault condition, obtains the expression of the circulating current of the parallel branch of the stator winding and the expression of the magnetic field generated by the circulating current, and finds out the offsetting effect of the circulating field on the original asymmetric magnetic field. A 300MW steam turbine generator is used as an example to carry out finite element simulation, which proves the weakening effect of the parallel branch structure of the stator winding on the short-circuit fault characteristics of the rotor winding, and the research conclusion is helpful to analyze the external appearance and causes of the short-circuit fault characteristics between turns of the rotor winding, and also provides theoretical support for the feature extraction in the fault diagnosis stage.

Key words: turbine generator, rotor winding inter-turn short circuit, diagnosis, parallel branch loop method, asymmetric magnetic field

陈冰兵, 武玉才, 纪璇, 朱新凯. 定子并联支路对主磁场不对称度的弱化效果评估[J]. 中国电力, 2025, 58(5): 189-198.

CHEN Bingbing, WU Yucai, JI Xuan, ZHU Xinkai. Evaluation of Weakening Effect of Stator Parallel Branch Circuit on Main Field Asymmetry[J]. Electric Power, 2025, 58(5): 189-198.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202404088

https://www.electricpower.com.cn/CN/Y2025/V58/I5/189

图/表 15

图 1 短路线匝磁势分布

Fig.1 Short-circuit turn potential distribution

图 2 汽轮发电机转子绕组短路状态时转子磁势分布

Fig.2 Rotor magnetic potential distribution in the short-circuit condition of the rotor winding of a turbine generator

图 3 导体a运动轨迹

Fig.3 Trajectory of conductor a

图 4 长距线圈模型及其电动势向量

Fig.4 Long distance coil model and its electromotive force vector

图 5 一组线圈的电动势向量

Fig.5 The electric potential vector of a set of coils

图 6 定子一相绕组结构

Fig.6 Stator one-phase winding structure

图 7 线圈磁势

Fig.7 Coil magnetic potential

图 8 磁势对比

Fig.8 Magnetic potential contrast

图 9 发电机二维模型

Fig.9 2 D model of generator

表 1 QFSN-300-2-20 B型汽轮发电机基本参数

Table 1 Basic parameters of QFSN-300-2-20 B turbine generator

项目	数值	项目	数值
额定功率/MW	300	额定功率因数	0.85
额定电压/kV	20	同步电抗标幺值	1.85477
额定电流/kA	10.19	定子绕组电阻/Ω	0.001658
相数	3	磁极数	2
额定励磁电流/A	2075	转速/(r·min^–1)	3000
接法	YY

图 10 不同观测点位置下磁密对比

Fig.10 Magnetic density contrast at different observation points

表 2 不同观测点位置下磁密对比

Table 2 Magnetic density contrast at different observation points 单位：T

观测点	波峰		波谷		不对称度		削弱程度
观测点	环流	无环流	环流	无环流	环流	无环流	削弱程度
1	0.990	0.986	–0.994	–0.998	0.004	0.012	0.008
2	0.929	0.925	–0.933	–0.937	0.004	0.012	0.008
3	0.919	0.915	–0.923	–0.927	0.004	0.012	0.008

图 11 不同短路程度下磁密对比

Fig.11 Magnetic density contrast under different degrees of short circuit

表 3 不同短路程度下的磁密对比

Table 3 Magnetic density contrast under different degrees of short circuit 单位：T

短路匝数	波峰		波谷		不对称度		削弱程度
短路匝数	环流	无环流	环流	无环流	环流	无环流	削弱程度
2	0.990	0.986	–0.994	–0.998	0.004	0.012	0.008
4	0.980	0.976	–0.989	–0.995	0.009	0.019	0.010
6	0.976	0.968	–0.985	–0.992	0.009	0.024	0.015

图 12 点1处磁密的谐波分析

Fig.12 Harmonic analysis of magnetic density at point 1

参考文献 25

1	张征平, 刘石, 姚森敬, 等. 大型发电机转子故障分析与诊断 [M]. 北京: 中国电力出版社, 2011.
2	武玉才, 马明晗. 同步发电机转子绕组匝间短路及诊断方法 [M]. 北京: 中国电力出版社, 2018.
3	李伟清. 汽轮发电机故障检查分析及预防 [M]. 北京: 中国电力出版社, 2002.
4	WOOD J W, HINDMARCH R T. Rotor winding short detection[J]. IEE Proceedings B Electric Power Applications, 1986, 133 (3): 181- 189. DOI
5	ALBRIGHT D R. Interturn short-circuit detector for turbine-generator rotor windings[J]. IEEE Transactions on Power Apparatus and Systems, 1971, 90 (2): 478- 483.
6	李永刚, 李和明, 赵华. 汽轮发电机转子绕组匝间短路故障诊断新判据[J]. 中国电机工程学报, 2003, 23 (6): 112- 116, 169. DOI
	LI Yonggang, LI Heming, ZHAO Hua. The new criterion on inter turn short-circuit fault diagnose of steam turbine generator rotor windings[J]. Proceedings of the CSEE, 2003, 23 (6): 112- 116, 169. DOI
7	WU Y C, LI Y G. Diagnosis of rotor winding interturn short-circuit in turbine generators using virtual power[J]. IEEE Transactions on Energy Conversion, 2015, 30 (1): 183- 188. DOI
8	ŠAŠIĆ M, LLOYD B, ELEZ A. Finite element analysis of turbine generator rotor winding shorted turns[J]. IEEE Transactions on Energy Conversion, 2012, 27 (4): 930- 937. DOI
9	孙宇光, 余锡文, 魏锟, 等. 发电机绕组匝间故障检测的新型探测线圈[J]. 中国电机工程学报, 2014, 34 (6): 917- 924.
	SUN Yuguang, YU Xiwen, WEI Kun, et al. A new type of search coil for detecting inter-turn faults in synchronous machines[J]. Proceedings of the CSEE, 2014, 34 (6): 917- 924.
10	WU Y C, LI Y G. Diagnosis of short circuit faults within turbogenerator excitation winding based on the expected electromotive force method[J]. IEEE Transactions on Energy Conversion, 2016, 31 (2): 706- 713. DOI
11	HSU J S, STEIN J. Shaft signals of salient-pole synchronous machines for eccentricity and shorted-field-coil detections[J]. IEEE Transactions on Energy Conversion, 1994, 9 (3): 572- 578.
12	武玉才, 李永刚, 李和明. 基于轴电压的隐极同步发电机转子典型故障诊断[J]. 电工技术学报, 2010, 25 (6): 178- 184.
	WU Yucai, LI Yonggang, LI Heming. Diagnosis of non-salient pole synchronous generator rotor's typical faults based on shaft voltage[J]. Transactions of China Electrotechnical Society, 2010, 25 (6): 178- 184.
13	李永刚, 李和明, 赵华, 等. 基于定子线圈探测的转子匝间短路故障识别方法[J]. 中国电机工程学报, 2004, 24 (2): 107- 112. DOI
	LI Yonggang, LI Heming, ZHAO Hua, et al. Fault identification method of rotor inter turn short-circuit using stator winding detection[J]. Proceedings of the CSEE, 2004, 24 (2): 107- 112. DOI
14	徐剑, 李永刚, 李和明. 基于TMS₃₂₀VC₃₃的汽轮发电机转子匝间短路在线诊断系统的研制[J]. 华北电力大学学报, 2006, 33 (1): 29- 33.
	XU Jian, LI Yonggang, LI Heming. Development of on-line diagnosis system of turbine-generator rotor’s turn-to-turn short circuit based on TMS₃₂₀VC₃₃[J]. Journal of North China Electric Power University (Natural Science Edition), 2006, 33 (1): 29- 33.
15	李和明, 万书亭, 李永刚. 基于定子绕组并联支路环流特性的发电机故障识别方法[J]. 电力系统自动化, 2005, 29 (6): 75- 78. DOI
	LI Heming, WAN Shuting, LI Yonggang. Generator fault diagnosis based on the circulating current in stator winding parallel branches[J]. Automation of Electric Power Systems, 2005, 29 (6): 75- 78. DOI
16	李永刚, 宋欣羽, 武玉才. 基于多回路理论的转子匝间短路时定子并联支路环流分析[J]. 电力系统自动化, 2009, 33 (17): 71- 75. DOI
	LI Yonggang, SONG Xinyu, WU Yucai. Characteristic analysis of circular current in generator stator parallel branches when inter-turn short-circuit of rotor windings occurs based on multi-loop theory[J]. Automation of Electric Power Systems, 2009, 33 (17): 71- 75. DOI
17	万书亭, 何玉灵, 唐贵基, 等. 发电机气隙偏心时定子并联支路的环流特性分析[J]. 高电压技术, 2010, 36 (6): 1547- 1553.
	WAN Shuting, HE Yuling, TANG Guiji, et al. Analysis on stator circulating current characteristics under eccentricity faults of turbo-generator[J]. High Voltage Engineering, 2010, 36 (6): 1547- 1553.
18	何玉灵, 万书亭, 唐贵基, 等. 定子匝间短路对发电机并联支路环流特性的影响[J]. 电机与控制学报, 2013, 17 (3): 1- 7. DOI
	HE Yuling, WAN Shuting, TANG Guiji, et al. Effects of stator interturn short circuit on the circulating current inside the parallel branch loop[J]. Electric Machines and Control, 2013, 17 (3): 1- 7. DOI
19	武玉才, 马冠华. 核电汽轮发电机转子绕组匝间短路的定子环流特征[J]. 电机与控制学报, 2020, 24 (3): 45- 52, 61.
	WU Yucai, MA Guanhua. Stator circulating current characteristics in nuclear turbine generator after rotor windings inter-turn short circuit fault[J]. Electric Machines and Control, 2020, 24 (3): 45- 52, 61.
20	武玉才, 马倩倩, 蔡波冲, 等. 水轮发电机转子绕组匝间短路故障的新型在线诊断方法[J]. 电机与控制学报, 2018, 22 (11): 19- 25.
	WU Yucai, MA Qianqian, CAI Bochong, et al. A new on-line fault diagnosis method of inter-turn short circuit fault in rotor winding of hydro-generator[J]. Electric Machines and Control, 2018, 22 (11): 19- 25.
21	何玉灵, 刘翔奥, 代德瑞, 等. 双馈异步发电机定子匝间短路对并联支路环流特性的影响[J]. 华北电力大学学报(自然科学版), 2025, 52 (1): 74- 81.
	HE Yuling, LIU Xiangao, DAI Derui, et al. Effect of stator interturn short circuit on circulating current characteristics of parallel branches in doubly fed induction generator[J]. Journal of North China Electric Power University (Natural Science Edition), 2025, 52 (1): 74- 81.
22	李永刚, 赵艳军, 陈雷, 等. 基于并联支路环流特征的转子匝间短路故障识别[J]. 高电压技术, 2009, 35 (5): 1014- 1019.
	LI Yonggang, ZHAO Yanjun, CHEN Lei, et al. Rotor winding inter-turn short circuit fault diagnosis based on the circulating current in stator winding parallel branches[J]. High Voltage Engineering, 2009, 35 (5): 1014- 1019.
23	曹桂州, 陈二强, 范轩杰, 等. 同步调相机极限工况下典型磁场不对称故障安全风险[J]. 中国电力, 2023, 56 (2): 45- 52, 76.
	CAO Guizhou, CHEN Erqiang, FAN Xuanjie, et al. Safety risk of synchronous condenser with typical asymmetric magnetic field faults under extreme operating conditions[J]. Electric Power, 2023, 56 (2): 45- 52, 76.
24	齐鹏, 李永刚, 马明晗, 等. 基于环流时频图谱的抽水蓄能机组励磁绕组匝间短路故障诊断[J]. 电工技术学报, 2023, 38 (22): 6104- 6120.
	QI Peng, LI Yonggang, MA Minghan, et al. Diagnosis of inter-turn short circuit in excitation winding of pumped storage units based on time-frequency map of circulating current[J]. Transactions of China Electrotechnical Society, 2023, 38 (22): 6104- 6120.
25	WU Y C, LI Y G, WAN S T, et al. Investigation of turbine generator rotor winding inter-turn short circuit fault based on harmonic detection[C]//2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. Nanjing, China. IEEE, 2008: 829-833.

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定子并联支路对主磁场不对称度的弱化效果评估

Evaluation of Weakening Effect of Stator Parallel Branch Circuit on Main Field Asymmetry

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定子并联支路对主磁场不对称度的弱化效果评估

Evaluation of Weakening Effect of Stator Parallel Branch Circuit on Main Field Asymmetry

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