Abstract：To improve the efficiency and dynamic response speed of the dual-active-bridge (DAB) DC-DC converter, a hybrid optimal control strategy based on the triple phase shift control was proposed. Firstly, in the operating modes of the DAB converter under the control of triple-phase-shift (TPS), two modes were selected, and a new external phase shift angle was introduced to reduce the difficulty of the converter modeling and the optimization design. Then, the working characteristics of the two modes were analyzed, and the transmission power model, current stress expression and soft switching constraint conditions of the two modes were deduced. By Karush-Kuhn-Tucker condition method, the optimal shift ratio combination satisfying the minimum current stress and the soft switching condition was obtained. On this basis, the output voltage state space model was established, and the output voltage at the next moment was predicted by the current information of the voltage and current, thus improving the dynamic performance of the converter. Finally, an experimental platform was built and the results have verified the effectiveness and superiority of the proposed hybrid optimization control strategy.
王攀攀, 徐泽涵, 王莉, 高利强, 王轩. 基于三重移相的双有源桥DC-DC变换器效率与动态性能混合优化控制策略[J]. 电工技术学报, 2022, 37(18): 4720-4731.
Wang Panpan, Xu Zehan, Wang Li, Gao Liqiang, Wang Xuan. A Hybrid Optimization Control Strategy of Efficiency and Dynamic Performance of Dual-Active-Bridge DC-DC Converter Based on Triple-Phase-Shift. Transactions of China Electrotechnical Society, 2022, 37(18): 4720-4731.
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