Abstract For the plug-in hybrid electric vehicle (PHEV) with independent generator, an integrated power converter topology based on back-to-back modular multilevel converter (MMC) and its external single-phase AC power supply charging control scheme are proposed in this paper. Using the advantage of the modular structure of MMC topology, this paper analyzes the power flow direction of each arm and sub module in the single-phase AC charging mode, and a sinusoidal half-wave modulation method suitable for this control strategy based on the carrier phase-shift SPWM is proposed. The main advantage of the proposed state of charge (SOC) multi-hierarchy equalization strategy compared to existing ones is that it achieves fast balanced charging of each battery unit without additional charging circuits or a complicated battery management system (BMS). Therefore, it is able to avoid the reduction of the cycle life of the overall energy storage system caused by the difference in single cells. The feasibility of the converter and the effectiveness of the charging control strategy were verified by Simulink simulation and hardware in loop (HIL) experiments using RT-LAB real-time simulator.
Yin Zeyi,Wang Guangzhu,Cheng Zhenxing. Charge Control Strategy of Plug-in Hybrid Electric Vehicle System Based on Modular Multilevel Converter[J]. Transactions of China Electrotechnical Society, 2020, 35(6): 1316-1326.
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