Excitation Current and Vibration Characteristics of DC Biased Transformer
作者机构：Key Laboratory of Modem Power System Simulation and Control&Renewable Energy TechnologyMinistry of Education(Northeast Electric Power University)Jilin 132012China
出 版 物：《CSEE Journal of Power and Energy Systems》 (中国电机工程学会电力与能源系统学报（英文）)
年 卷 期：2021年第7卷第3期
页 面：604-613页
核心收录：
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：This work was supported by the Science and Technology Development Plan Project of Jilin Province(20190303007SF) National Natural Science Foundation of China(51507027) Jilin Science and Technology Innovation and Development Project(20166014).
主 题：DC disturbance excitation-vibration harmonic response Y/△transformer
摘 要：In practical engineering,DC disturbance will lead to excitation saturation and vibration intensification on transformer core,as well as affecting the normal operation of equipment and power grid.According to the problem,a new idea is proposed in this paper.Based on the electromagnetic characteristics of DC biased transformer,excitation saturation and core vibration are studied by using excitation-vibration harmonic response analysis method.Excitation current is identified through electromagnetic coupling to characterize the excitation saturation degree.Then,vibration harmonic response model is established to analyze core vibration.Electromagnetic characteristics of DC biased Y/△transformer are simulated.The variation of excitation current and core vibration at different DC levels are studied.Excitation-vibration characteristics of three-phase group transformer and three-phase three-limb transformer are compared and sum-marized.With experimental platform built,the correctness of simulation results is verified by experimental data,and the effectiveness of the proposed method can be proved.
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