Fault diagnosis of excitation winding inter-turn short circuit of nuclear power half speed turbo-generator based on stator double coils

被引：0
|
作者：
Ma M.-H. [1 ]
Wu Y.-C. [1 ]
Li Y.-G. [1 ]
Wang L. [1 ]
机构：
[1] Institute of Electrical and Electronic Engineering, North China Electric Power University, Baoding
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2019年 / 23卷 / 06期
关键词：
Detection coil; Excitation winding inter-turn short circuit; Fault diagnosis; Harmonics; Turbo-generator;
D O I：
10.15938/j.emc.2019.06.002
中图分类号：
学科分类号：
摘要：
Failure to find excitation winding inter-turn short circuit fault in large turbo-generator in time will probably cause the fault enlargement. The outage of turbo-generator will cause great economic losses. This paper analyses the magnetic field characteristics of the excitation winding inter-turn short circuit fault of the turbo-generator. Combined with the structure characteristics of the stator core, two detection coils were installed at the top of two stator core teeth with one pole apart from each other. The frequency domain and time domain characteristics of the induction voltage of the detection coils were extracted. The excitation winding inter-turn short circuit was diagnosed by the fractional harmonics of the induced voltage generated in detection coils. With a 1 150 MW half speed turbo-generator, the simulation verification was completed. It proves that the double coils method can realize the online fault diagnosis without the influence of the operation state of the generator, and locate the fault accurately. © 2019, Harbin University of Science and Technology Publication. All right reserved.
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页码：10 / 17
页数：7
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共 20 条
  • [1] Chen X., Luo D., Shan Y., Application of wavelet analysis on fault diagnosis of interturn short circuit in rotor windings, Electric Machines and Control, 11, 2, (2007)
  • [2] Wan S., Zhang Y., Hu Y., Analysis of impact of rotor winding inter-turn short circuit faults on electromagnetic torque, Electric Machines and Control, 16, 8, (2012)
  • [3] Wu Y., Li Y., Feng W., Et al., Analysis on unbalanced magnetic pull generated by turn-to-turn short circuit of rotor windings within turbine generator, Electric Machines and Control, 19, 3, (2015)
  • [4] Wu Y., Wang Y., Xu Q., Et al., Diagnosis of inter-turn short circuit fault in rotor winding of turbo generator using excitation step method, Electric Machines and Control, 21, 9, (2017)
  • [5] Li Y., Li H., Zhao H., The new criterion on inter turn short-circuit fault diagnose of steam turbine generator rotor windings, Proceedings of the CSEE, 23, 6, (2003)
  • [6] Hsu J.S., Stein J., Shaft signals of salient-pole synchronous machines for eccentricity and shorted-field-coil detections, IEEE Transactions on Energy Conversion, 9, 3, (1994)
  • [7] Li H., Wu Y., Li Y., Influence of rotor windings inter-turn short circuit fault on electric machine shaft voltage, Proceedings of the CSEE, 29, 36, (2009)
  • [8] Wu Y., Li Y., Li H., Diagnosis of non-salient pole synchronous generator rotor's typical faults based on shaft voltage, Transactions of China Electrotechnical Society, 25, 6, (2010)
  • [9] Wu Y., Li Y., Experimental study of rotor inter-turn short circuit fault diagnosis in turbine generator based on characteristic frequency of end-leakage-flux, Transactions of China Electrotechnical Society, 29, 11, (2014)
  • [10] Wu Y., Li Y., Diagnosis of rotor winding interturn short-circuit in turbine generators using virtual power, IEEE Transactions on Energy Conversion, 30, 1, (2015)
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