基于模块化多电平DC-DC变换器的电动汽车电池充电器

Shwet Prasoon, S. Gaurav, D. Kumar, Chandan Kumar
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引用次数: 0

摘要

模块化多电平变换器(MMC)是近年来电力电子变换器在中压/高压应用中的突出选择。MMC的主要特点是模块化设计、可扩展性强、可靠性好、容错能力强、升压比高、滤波要求少。提出了一种基于无变压器MMC的电动汽车电池充电器。设计了一种高升压比MMC dc-dc变换器,将高输入电压转换为电池电压电平。这种配置确保大大降低了设计的复杂性、系统成本和快速充电的空间要求。采用相移脉宽调制来控制MMC操作。采用比例积分(PI)控制器对恒流模式下的电池进行充电,直至电池荷电状态达到80%,实现了变换器的闭环工作。此外,它在恒压模式下充电。下臂子模块(SM)确保平衡电容器电压,而不需要任何额外的控制架构。在MATLAB/Simulink环境下进行了仿真验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modular Multilevel DC-DC Converter Based EV Battery Charger
In the recent times, modular multilevel converter (MMC) is a prominent choice of power electronic converter in medium voltage (MV)/high voltage (HV) applications. The main features of MMC are modular design, scalability, reliability, fault tolerance capability, high step-up ratio and less filtering requirements. This paper presents a transformer-less MMC based electric vehicle (EV) battery charger. A high step-up/down ratio MMC dc-dc converter is designed such that the high input voltage is converted to the battery voltage level. This configuration ensures significant reduction in the complexity of design, system costs and space requirements for fast charging. Phase-shifted pulse width modulation is used to control the MMC operation. The closed-loop operation of the converter is realized using proportional integral (PI) controller for charging of battery in constant current mode till 80% state of charge (SoC) of battery. Further, it is charged in constant voltage mode. A lower arm sub-module (SM) ensures the balanced capacitor voltage without requirement of any additional control architecture. The results are verified using simulation carried out in MATLAB/Simulink environment.
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