Please enter verification code
Confirm
Analysis on Electromagnetic Force Properties of End Windings in Turbo-Generators
International Journal of Electrical Components and Energy Conversion
Volume 6, Issue 2, December 2020, Pages: 14-21
Received: Dec. 14, 2020; Accepted: Dec. 25, 2020; Published: Dec. 31, 2020
Views 33      Downloads 20
Authors
Guiji Tang, Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding, China
Hongchun Jiang, Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding, China
Yuling He, Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Department of Mechanical Engineering, North China Electric Power University, Baoding, China
Gaurang Vakil, Department of Electrical and Electronics Engineering, University of Nottingham, Nottingham, UK
Article Tools
Follow on us
Abstract
Electromagnetic forces on the end windings will stimulate intensive vibrations and cause insulation wearing, and the vibration wear will further induce the coil short circuit. Eventually accidents and losses will be brought. Therefore, it is of great significance to study the electromagnetic force properties of end windings. This paper studied on the electromagnetic force properties of end windings in turbo-generators. Firstly, the magnetic field in the end region was analyzed by winding MMF superposition principle and air gap magnetic conductivity method, and the electromagnetic force is got with Ampere law. Then, taking QFSN-600-2YHG turbo-generator as study object, the 3 directional electromagnetic forces and the mechanical responses on the end windings were calculate by electromagnetic-structure coupling finite element analysis method. Finally, the experiment vibrations are tested, and the acceleration data was compared with simulated result. It is shown that each directional electromagnetic force contains both the DC component and even harmonics, which will result in the winding vibration mainly at the double fundamental frequency. Meantime, the radial acceleration is the largest and the axial one is the least, so the radial vibration should be paid more attention to in daily monitoring. Moreover, the max deformation mainly occurs on the nose and middle part of the involute, and these locations should be strengthened in design and manufacture.
Keywords
Turbo-generator, End Winding, Electromagnetic Force, Vibration
To cite this article
Guiji Tang, Hongchun Jiang, Yuling He, Gaurang Vakil, Analysis on Electromagnetic Force Properties of End Windings in Turbo-Generators, International Journal of Electrical Components and Energy Conversion. Vol. 6, No. 2, 2020, pp. 14-21. doi: 10.11648/j.ijecec.20200602.12
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
G. K. M. Khan, G. W. Buckley and N. Brooks, "Calculation of forces and stresses on generator end-windings. I. Forces," in IEEE Transactions on Energy Conversion, 1989 4 (4): 661-670.
[2]
Hu Yuda, Qiu Jiajun, Qin Guanghui. "Electrtomanetic vibration of integrity end winding of large turbo-generator" in Proceedings of the CSEE, 07 (2003): 93-98 (in chinese).
[3]
Yu-Ling He, Wei-Qi Deng, Bo Peng, etc., "Stator Vibration Characteristic Identification of Turbogenerator among Single and Composite Faults Composed of Static Air-Gap Eccentricity and Rotor Interturn Short Circuit," in Shock and Vibration, 2016, Open Access, DOI: 10.1155/2016/5971081.
[4]
Yu-Ling He, Meng-Qiang Ke, Fa-Lin Wang, etc, “Effect of Static Eccentricity and Stator Inter-Turn Short Circuit Composite Fault on Rotor Vibration Characteristics of Generator,” in Transactions of the Canadian Society for Mechanical Engineering, Vol. 39, No. 4, pp. 767-781, 2015.
[5]
W. Yucai and L. Yonggang, "Diagnosis of Rotor Winding Interturn Short-Circuit in Turbine Generators Using Virtual Power," in IEEE Transactions on Energy Conversion, vol. 30, no. 1, pp. 183-188, March 2015.
[6]
Zhang, Guoyuan, Wei, Junchao, Huang, Haizhou, Zhou, Miao, “A study on the nonlinear vibration of the generator rotor based on the unbalanced electromagnetic force and the oil film force coupling model,” Journal of Vibroengineering, v 15, n 1, p 23-36, March 2013.
[7]
C. Patsios, A. Chaniotis, E. Tsampouris and A. Kladas, "Particular Electromagnetic Field Computation for Permanent Magnet Generator Wind Turbine Analysis," in IEEE Transactions on Magnetics, vol. 46, no. 8, pp. 2751-2754, Aug. 2010.
[8]
R. Albanese et al., "Coupled Three Dimensional Numerical Calculation of Forces and Stresses on the End Windings of Large Turbo Generators via Integral Formulation," in IEEE Transactions on Magnetics, vol. 48, no. 2, pp. 875-878, Feb. 2012.
[9]
Y. Fang, X. Bao, Q. lv, X. Cheng and Y. He, "Analysis of Electromagnetic Force Distribution on End Winding of Electrical Submersible Motor During Starting Transient Operation," in IEEE Transactions on Magnetics, vol. 49, no. 10, pp. 5341-5345, Oct. 2013 (In the meantime, the electromagnetic force distribution of the winding was also investigated, showing that the radial forces on the inner layer are stronger than those on the outer layer).
[10]
Liezheng Tang, Jiangjun Ruan, Hengyu Ding. “Analysis of Transient Magnetic Force on End-Winding in the Inverter-Fed Induction Machine,” Journal of Electrical Engineering & Technology, 2020, 15: 235–243.
[11]
Stermecki, A., et al. "Numerical simulation of electromagnetic and mechanical phenomena in the end-winding region of three-phase induction machines*." E & I Elektrotechnik Und Informationstechnik 128.5 (2011): 167-173.
[12]
Y. Zhao, B. Yan, C. Zeng, S. Huang, C. Chen and J. Deng, "Optimal Scheme for Structural Design of Large Turbogenerator Stator End Winding," in IEEE Transactions on Energy Conversion, vol. 31, no. 4, pp. 1423-1432, Dec. 2016.
[13]
H. Yin, X. Zhang, F. Ma, C. Gu, H. Gao and Y. Wang, "New Equivalent model and Modal Analysis of Stator Core-Winding System of Permanent Magnet Motor With Concentrated Winding," in IEEE Access, vol. 8, pp. 78140-78150, 2020.
[14]
T. Lugand and A. Schwery, "Comparison Between the Salient-Pole Synchronous Machine and the Doubly Fed Induction Machine With Regard to Electromagnetic Parasitic Forces and Stator Vibrations," in IEEE Transactions on Industry Applications, vol. 53, no. 6, pp. 5284-5294, Nov.-Dec. 2017.
[15]
Jiang H C, He Y L, Tang G J, etc., “A Comprehensive Analysis on Transient Electromagnetic Force Behavior of Stator Windings in Turbo-Generator,” Mathematical Problems in Engineering, 2018, 2018: 1-16.
ADDRESS
Science Publishing Group
1 Rockefeller Plaza,
10th and 11th Floors,
New York, NY 10020
U.S.A.
Tel: (001)347-983-5186