无分支电流互感器的同步发电机转子匝间短路监测方法

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (776 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The inter-turn short circuit of rotor windings is a normal electrical fault of a large turbine generator, and fault worsening will seriously hinder normal and safe operation of a generator. Since most of turbine generators in China are provided with no installation condition for a branch current transformer, application of the monitoring principle based on the stator unbalanced current RMS is limited. For solving the above problem, the paper provides a monitoring method of inter-turn short circuit of rotor windings in synchronous generators without stator branch current transformer. A fault monitoring criterion is formed according to change of excitation MMF before and after faults. In the calculation of real excitation MMF, only stator leakage reactance and no load characteristic curve of the generator are used, and influence upon calculation precision by the generator operating mode is smaller. Effectiveness of the monitoring method is verified through the experiment on a 12kW non-salient-pole synchronous generator with one pole. The method is also suitable for rotor two-point grounding fault protection.

Key words： Turbine generator field winding inter-turn short circuit two points to earth monitoring excitation MMF

Received: 14 September 2012 Published: 17 June 2014

PACS:	TM311
	TM461

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Hao Liangliang
	Wu Junyong
	Sun Yuguang
	Wang Xiangheng

Cite this article:

Hao Liangliang,Wu Junyong,Sun Yuguang等. Monitoring of Inter-Turn Short Circuit of Rotor Windings in Synchronous Generators Without Stator Branch Current Transformer[J]. Transactions of China Electrotechnical Society, 2014, 29(3): 189-195.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I3/189

[1] 马宏忠. 电机状态监测与故障诊断[M]. 北京: 机械工业出版社, 2002.
[2] Wood J W. Rotor winding short detection [J]. IEE Proceedings B-Electric Power Applications, 1986, 133(3): 30-35.
[3] Sharkawi E I M A, Marks R J II, Oh S, et al. Localization of winding shorts using fuzzified neural networks[J]. IEEE Transactions on Energy Conversion, 1995, 10(1): 140-143.
[4] Stoll R L, Hennache A. Method of detecting and modeling presence of shorted turns in dc field winding of cylindrical rotor synchronous machines using two air-gap search coils[J]. IEE Proceedings B-Electric Power Applications, 1988, 135(6): 281-294.
[5] Penman J, Jiang H. The detection of stator and rotor winding short circuits in synchronous generators by analysing excitation current harmonics[C]. Proceedings of Opportunities and Advances in International Electric Power Generation, Durham, UK, 1996: 137-142.
[6] Alan M, Mirko C. Experimental research on rotor fault diagnosis using external coil voltage analysis and shaft voltage signal analysis[C]. Proceedings of the Symposium on Diagnostics for Electric Machines, Power Electronics and Drives, Vienna, Austria, 2005: 1-4.
[7] Hao Liangliang, Sun Yuguang, Qiu Arui, et al. Steady-state calculation and online monitoring of interturn short circuit of field windings in synchronous machines[J]. IEEE Transactions on Energy Conversion, 2012, 27(1): 128-138.
[8] 孙宇光, 郝亮亮, 王祥珩. 同步发电机励磁绕组匝间短路故障时的稳态电流谐波特征研究[J]. 中国电机工程学报, 2010, 30(33): 51-57.
Sun Yuguang, Hao Liangliang, Wang Xiangheng. Steady-state currents harmonic characteristics of synchronous machine with inter-turn short circuits of field windings[J]. Proceedings of the CSEE, 2010, 30(33): 51-57.
[9] 郝亮亮, 孙宇光, 邱阿瑞, 等. 基于主保护不平衡电流有效值的转子匝间短路故障监测[J]. 电力系统自动化, 2011, 35(13): 83-87, 107.
Hao Liangliang, Sun Yuguang, Qiu Arui, et al. Monitoring of field winding inter-turn short circuit based on unbalanced current effective value in main protection[J]. Automation of Electric Power Systems, 2011, 35(13): 83-87, 107.
[10] Trutt F C, Sottile J, Kohler J L. Detection of AC machine winding deterioration using electrically excited vibrations[J]. IEEE Transactions on Industry Applications, 2001, 37(1): 10-14.
[11] Huang Haizhou, Zhang Kanjun, Zhang Yong. Detection of turbine generator field winding serious inter-turn short circuit based on the rotor vibration feature[C]. Proceedings of the 44th Universities Power Engineering Conference, Glasgow, 2009: 1-5.
[12] 李永刚, 李和明. 汽轮发电机转子匝间短路故障分析与诊断新方法[J]. 电力系统自动化, 1998, 22(6): 21-23, 31.
Li Yonggang, Li Heming. A new method for fault analysis and diagnosis of interturn in turbo-generator rotor[J]. Automation of Electric Power Systems, 1998, 22(6): 21-23, 31.
[13] 李永刚, 李和明. 在线检测汽轮发电机转子匝间短路故障方法研究[J]. 电力系统自动化, 2002, 26(20): 47-49.
Li Yonggang, Li Heming. On-line diagnosis for turn-to-turn short circuit of rotor windings in turbo generator[J]. Automation of Electric Power Systems, 2002, 26(20): 47-49.
[14] 李永刚, 李和明, 赵华. 汽轮发电机转子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.
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.
[15] 孙旭东, 王善铭. 电机学[M]. 北京: 清华大学出版社, 2006.
[16] 桂林, 王祥珩, 孙宇光, 等. 大型汽轮发电机新型中性点引出方式的研究[J]. 电力系统自动化, 2006, 30(1): 56-59.
Gui Lin, Wang Xiangheng, Sun Yuguang, et al. Study on new leading-out mode of neutral points of large generator[J]. Automation of Electric Power Systems, 2006, 30(1): 56-59.
[17] 桂林, 王祥珩, 王维俭, 等. 大型汽轮发电机中性点引出方式及保护配置方法: 中国, CN101702512A[P]. 2005-09-07.