Excitation-Vibration Characteristics of Transformer in AC-DC Hybrid Operation
Pan Chao1, Yi Shuangyuan1, Cai Guowei1, Zheng Yongjian2
1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin 132012 China; 2. State Grid Beijing Fengtai Electric Power Supply Company Beijing 100073 China
Abstract：An excitation-vibration harmonic response model is proposed to solve the core vibration problem of power transformer under different DC disturbances. The electromagnetic coupling state equation of transformer in AC-DC hybrid operation is established. Based on energy disturbance principle, two state variables of dynamic inductance and time-domain current are calculated. Subsequently, the identification method of exciting current is studied, and the excitation current-vibration harmonic response model is constructed. The electromagnetic characteristics of transformer is simulated in AC-DC hybrid operation. The exciting current and the core vibration acceleration are calculated under different DC disturbances. Then the harmonics of exciting current is analyzed, and the relationship between variation rule of exciting current and vibration characteristics of core is summarized. An experiment platform of 220V single-phase transformer is set up in AC-DC hybrid operation. The excitation current is identified by excitation parameter identification module, and the vibration signal of transformer core is collected by vibration monitoring module. The simulation results are compared with the experimental data to verify the correctness of the simulation model.
潘超, 衣双园, 蔡国伟, 郑永健. 交直流混杂模式下变压器励磁-振动特性研究[J]. 电工技术学报, 2019, 34(18): 3788-3796.
Pan Chao, Yi Shuangyuan, Cai Guowei, Zheng Yongjian. Excitation-Vibration Characteristics of Transformer in AC-DC Hybrid Operation. Transactions of China Electrotechnical Society, 2019, 34(18): 3788-3796.
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2019, Vol. 34 
