Optimization of Isolated Bi-Directional DC-DC Converter Based on Alternative Modulation Method
Gao Ning1, Chen Qiang1, Li Rui1, Cai Xu1, Zhang Baihua2, Li Yongqi2
1. Wind Power Research Center School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China; 2. China Southern Power Grid Power Generation Company Guangzhou 510630 China
Abstract：As a core component of solid-state transformer, the efficiency of high power isolated bi-directional DC-DC converter is very important. This paper describes the principles of dual active bridge (DAB) in detail, and expressions of dissipated power are obtained in order to predict the different components losses. Moreover, this paper presents a novel control method based on alternative modulation mode to achieve higher efficiency. Then a prototype converter with rated power 35kW is implemented to verify the power loss prediction and control method. The values of measured efficiency are 98.1% and 97.6% respectively with different leakage reluctances.
高宁, 陈强, 李睿, 蔡旭, 张百华, 李勇琦. 一种基于模式切换的隔离型双向直流变换器效率优化方法[J]. 电工技术学报, 2016, 31(6): 135-143.
Gao Ning, Chen Qiang, Li Rui, Cai Xu, Zhang Baihua, Li Yongqi. Optimization of Isolated Bi-Directional DC-DC Converter Based on Alternative Modulation Method. Transactions of China Electrotechnical Society, 2016, 31(6): 135-143.
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2016, Vol. 31 
