Research on Characterization of Core Vibration by Abnormal Current of DC Bias Transformer
Pan Chao, Su Hao, Cai Guowei, Chen Xiang
Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin 132012 China
Abstract：DC disturbance vibration model of single-phase transformer and three-phase three- limb Yd transformer are established according to core vibration problem of transformer disturbed by DC. Winding current is identified based on electromagnetic coupling principle, and vibration harmonic response model was constructed to research vibration characteristics. Electromagnetic characteristics of transformer under different DC levels are simulated. Variation characteristics of winding abnormal current and core vibration acceleration under the influence of DC are analyzed, and summarizing rule. AC/DC hybrid dynamic model experimental platform of transformer is built to identify and collect the winding current and core vibration signals respectively. Experimental data are compared with simulation results to verify the correctness and effectiveness of the proposed method.
潘超, 苏昊, 蔡国伟, 陈祥. 变压器直流偏磁下异常电流表征振动特性研究[J]. 电工技术学报, 2020, 35(9): 1868-1879.
Pan Chao, Su Hao, Cai Guowei, Chen Xiang. Research on Characterization of Core Vibration by Abnormal Current of DC Bias Transformer. Transactions of China Electrotechnical Society, 2020, 35(9): 1868-1879.
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