Analysis and Application of Output Impedance Characteristics of High-Capacity DC-DC Converter
Peng Fangcheng1,2, Fan Xuexin2, Wang Ruitian2, Liu Jinhui1, Chen Jinmeng1
1. Naval Submarine Academy Qingdao 266199 China; 2. National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan 430033 China
Abstract：Voltage oscillation may be caused by impedance mismatch after cascading the high-capacity power electronic converters in the low-voltage power transformation and distribution subsystem of the ship. In order to explore the factors that affect static stability of the cascaded system with high-capacity DC-DC converter, this paper mainly focused on modeling and analyzing of output impedance. Firstly, the small signal model of the high-capacity DC-DC converter was established, and correspondingly, the output impedance models was derived. Secondly, the system stability according to the impedance ratio criterion was analyzed. It is clear that the peak value of the output impedance of the high-capacity DC-DC converter is the dominant factor causing the impedance mismatch. Thirdly, by exploring the influence of the control strategy, control parameters and filter parameters on the converter’s output impedance amplitude under different operation modes, the parameter optimization direction was found for improving the static stability of the system. Finally, the theoretical analysis was verified by PSCAD/EMTDC simulation and test.
彭方成, 范学鑫, 王瑞田, 刘金辉, 陈金萌. 大容量DC-DC变流器输出阻抗特性分析及应用[J]. 电工技术学报, 2021, 36(16): 3422-3432.
Peng Fangcheng, Fan Xuexin, Wang Ruitian, Liu Jinhui, Chen Jinmeng. Analysis and Application of Output Impedance Characteristics of High-Capacity DC-DC Converter. Transactions of China Electrotechnical Society, 2021, 36(16): 3422-3432.
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2021, Vol. 36 
