Abstract：In this paper, the power transformer vibration problems caused by DC magnetic bias were studied. First, I have finished the simulation and modal experiment for the natural frequencies of transformer and given the basic theory of vibration measurements.On this basis, the vibration testing of transformer was also done. The waveforms of vibration displacement of measuring points in time domain and frequency domain, the trends of vibration intensity of measuring points and displacement RMS on different joints and DC magnetic bias conditions were given. Finally, summing up the basic laws of the transformer vibration on the basis of theory and experiment and obtaining the basic methods of reducing vibration. The experimental reference was provided for the vibration problems of large power transformers under the DC magnetic bias conditions.
白保东, 刘闯, 王佳音. 直流偏磁下变压器振动的仿真及实验研究[J]. 电工技术学报, 2013, 28(2增): 427-433.
Bai Baodong, Liu Chuang, Wang Jiayin. Simulation and Experimental Research of Transformer Vibration under DC Magnetic Bias. Transactions of China Electrotechnical Society, 2013, 28(2增): 427-433.
[1] Moses AT, Anderson PI, Phophongviwat. T, et al. Contrilution of niagnetostriction to transformer noise[C]. Proceedings of the 31st lnternational Universities Power Engineering Conferenct, 2010: 1-5. [2] Nabil Hihat, Ewa Napieralska Juszczak, Jean Philippe Lecointe, et al. Equivalent permeability of step-lap joint of transformer cores: computational and experimental considerations[J]. IEEE Transactions on Magnetics, 2011, 47(1): 244-251. [3] Witod Kubiak, Pawel Witczak. Vibration analysis of small power transformer[J]. The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2010, 29(4): 1116-1124. [4] 李贞, 李庆民, 李长云, 等. 直流偏磁条件下变压器的谐波畸变特征[J]. 电力系统保护与控制, 2010, 38(24): 52-55. Li Zhen, Li Qingmin, Li Changyun, et al. Harmonic distortion feature of AC transformers caused by DC bias[J]. Power System Protection and Control, 2010, 38(24): 52-55. [5] Wataru Kitagawa, Yoshiyuki Ishihara. Analysis of structural deformation and vibration of a transformer core by using magnetic property of mangnetostriction[J]. Electrical Engineering in Japan, 2010, 172(1): 19-26. [6] Baguley C A, Madawala U K, Carsten B. The impact of vibration due to magnetostriction on the core losses of ferrite toroidals under DC bias[J]. IEEE Trasactions on Magnetics, 2011, 47(8): 2022-2028. [7] Tom Hilgert, Lieven Vandevelde, et al. Comparison of magnetostriction models for use in calculations of vibration in magnetic cores[J]. IEEE Transactions on Magnetics, 2008, 44(6): 874-877. [8] 郭满生, 梅桂华, 刘东升, 等. 直流偏磁条件下电力变压器铁心B-H曲线及非对称励磁电流[J]. 电工技术学报, 2009, 24(5): 46-51, 59. Guo Mansheng, Mei Guihua, Liu Dongsheng, et al. B-H curve based on core and asymmetric magnetizing current in DC-biased transformer[J]. Transactions of China Electrotechnical Society, 2009, 24(5): 46-51, 59. [9] 姚缨英. 大型电力变压器直流偏磁现象的研究[D]. 沈阳: 沈阳工业大学, 2000. [10] 赵志刚, 刘福贵, 张俊杰, 等. 直流偏磁条件下变压器励磁电流的实验与分析[J]. 电工技术学报, 2010, 25(4): 71-76. Zhao Zhigang, Liu Fugui, Zhang Junjie, et al. Measurement and analysis of magnetizing current in DC-biased transformers[J]. Transactions of China Electrotechnical Society, 2010, 25(4): 71-76. [11] 朱林, 韦晨, 余洋. 单相变压器的直流偏磁励磁电流问题及其对保护的影响分析[J]. 电力系统保护与控制, 2010, 38(24): 158-162. Zhu Lin, Wei Chen, Yu Yang. Analysis of DC bias exciting current of the single-phase transformer and its effect on protection[J]．Power System Protection and Control, 2010, 38(24): 158-162. [12] 李长云, 李庆民, 李贞, 等. 直流偏磁和剩磁同时作用下保护用电流互感器的暂态特性研究[J]. 电力系统保护与控制, 2010, 38(23): 107-111. Li Changyun, Li Qingmin, Li Zhen, et al. Research on the transient characteristics of the protective CTS with co-impacts of DC bias and remnant flux[J]. Power System Protection and Control, 2010, 38(23): 107-111. [13] 潘超, 王泽忠, 李海龙, 等. 基于瞬态场路耦合模型的变压器直流偏磁计算[J]. 电工技术学报, 2013, 28(5): 174-181. Pan Chao, Wang Zezhong, Li Hailong, et al. DC-bias calculation for single phase transformers based on transient field-circuit coupled model[J]. Transactions of China Electrotechnical Society, 2013, 28(5): 174-181. [14] 王天煜, 王凤翔. 大型异步电动机定子振动与模态分析[J]. 中国电机工程学报, 2007, 27(12): 41-45. Wang Tianyu, Wang Fengxiang. Vibration and modal analysis of stator of large induction motors[J]. Proceedings of the CSEE, 2007, 27(12): 41-45． 作者简介:白保东 男, 1955年生, 教授, 博士生导师, 研究方向为工程电磁场、电磁兼容、医学永磁机构。刘闯 男, 1988年生, 硕士研究生, 研究方向为大型电力变压器直流偏磁问题。
2013, Vol. 28 
