A L-LLC Resonant Bidirectional DC-DC Converter Based on Hybrid Control of Variable Frequency and Phase Shift
Lü Zheng1, Yan Xiangwu1, Sun Lei2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China; 2. College of Mechanical and Electrical Engineering Agricultural University of Hebei Baoding 071001 China
Abstract：Considering the development and application of the energy storage systems in DC distribution system, bidirectional DC-DC converters with high power conversion efficiency and wide adjustable range are required. According to the hybrid control of variable-frequency (VF) and phase-shift (PS), a L-LLC resonant bidirectional DC-DC converter was proposed in this paper. It not only has wide adjustable ranges of the DC voltage gain and the transmission power, but also can realize the zero-voltage switching for input switches and zero-current switching for output rectifiers simultaneously. That leads to a high overall efficiency. Operation behaviors and characteristics of the converter under single VF or PS control were described. Then the rationality of the hybrid control was proved in theory, and an easy implementation was given. The experimental results of the prototype confirmed the validity of the theoretical analysis as well as the superior performance of L-LLC converter in operational efficiency and adjustable range.
吕正, 颜湘武, 孙磊. 基于变频-移相混合控制的L-LLC谐振双向DC-DC变换器[J]. 电工技术学报, 2017, 32(4): 12-24.
Lü Zheng, Yan Xiangwu, Sun Lei. A L-LLC Resonant Bidirectional DC-DC Converter Based on Hybrid Control of Variable Frequency and Phase Shift. Transactions of China Electrotechnical Society, 2017, 32(4): 12-24.
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2017, Vol. 32 
