Analysis on DC Bias Impact on Converter Transformers Operation

被引：0
|
作者：
Tong Y. [1 ]
Zhu Q. [2 ]
He L. [2 ]
Zhao X. [3 ]
机构：
[1] State Grid International Development Co., Ltd., Beijing
[2] State Grid Economic and Technological Research Institute Co., Ltd., Beijing
[3] Department of Electrical Engineering, North China Electric Power University, Baoding
来源：
Gaodianya Jishu/High Voltage Engineering | 2021年 / 47卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Converter transformer; DC bias; Excitation characteristics; Noise; UHV; Vibration;
D O I：
10.13336/j.1003-6520.hve.20200882
中图分类号：
学科分类号：
摘要：
The UHVDC projects have been rapidly developed and practiced in recent years because of their advantages of large transmission capacity and long transmission distance. However, the DC bias phenomenon has long existed in the UHVDC projects. The DC bias current will cause the distortion of excitation current, and increase the vibration and noise of the UHVDC converter transformer, which will jeopardize the safe and stable operation of the converter transformer in severe cases. In this paper, the principle of DC bias current was firstly analyzed, then the impact level of a practical UHVDC project was determined by calculation. A UHVDC converter transformer core was constructed to simulate and test its ex-citation characteristics. The impacts of DC bias on transformer vibration and noise were investigated, and multiphysics coupling modeling and simulation were performed by using finite element method. The research results are of practical significance for guiding the design of converter transformers and for taking the noise reduction measures in subsequent projects. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：2206 / 2213
页数：7
相关论文
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