1. State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an 710049 China; 2. State Grid Hebei Electric Power Research Institute Shijiazhuang 050021 China
Abstract：The vibration model of high-voltage shunt reactor core is the basis for its fault detection and noise reduction. Traditionally, it is believed that the Maxwell force on the core is only a sinusoidal function of time, which can not explain the multi-harmonic components of vibration signal on the tank measured in practice fully. This paper presents a theory that the coupling effect between Maxwell force and vibration is one of the reasons for the multi-harmonic phenomenon. The basic element vibration model of shunt reactor core was established using Lagrange mechanics. The frequency domain characteristics of the model's solution far away from the resonance region were analyzed using normal perturbation method, and the frequency domain characteristics were analyzed respectively at super-harmonic resonance and sub-harmonic resonance, using L-P method. The results show that the coupling between Maxwell force and vibration is one of the causes of 2hω (h=1,2,3,…, ω=50 Hz) harmonics and explain the phenomenon that the amplitude decreases rapidly with the increasing frequency. When super-harmonic resonance occurs in the core, 2hω (h=1, 2, 3,…, ω=50 Hz) harmonics appear, and the 200 Hz vibration component increases significantly. When subharmonic resonance occurs in the core, hω (h=1, 2, 3,…, ω=50 Hz) harmonics appear, and the 50 Hz vibration component increases significantly. The reactor tank vibration tests results of 1 000 kV and 500 kV shunt reactor are consistent with the theoretical prediction proposed in this paper, indicating the rationality of the model. The results provide a new perspective and understanding to judge the axial tightness of shunt reactor core based on the vibration of reactor tank.
党永亮, 张玉焜, 祝令瑜, 高树国, 孟令明, 刘宏亮. 基于麦克斯韦力-振动耦合的高压油浸式并联电抗器铁心多倍频振动机理研究[J]. 电工技术学报, 2024, 39(zk1): 117-126.
Dang Yongliang, Zhang Yukun, Zhu Lingyu, Gao Shuguo, Meng Lingming, Liu Hongliang. Study on Multi-Harmonic Vibration Mechanism of High-Voltage Shunt Reactor Core Based On Coupling between Maxwell Force and Vibration. Transactions of China Electrotechnical Society, 2024, 39(zk1): 117-126.
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2024, Vol. 39 
