基于CPS-SPWM的模块化多电平整流器的研究与应用

首先介绍MMC整流的原理和拓扑结构。建立数学模型，并以其中一相A相为例进行分析，直观地分析其工作原理。分析CPS-SPWM的工作原理，基于CPS-SPWM对MMC整流进行调制。其次在Matlab/Simulink中搭建仿真模型。在综合控制上，首先给出整个控制流程图，然后分别介绍了电流电压内外环闭环控制，保持桥臂电压平衡控制以及子模块电容电压的稳压控制的原理及控制方法。最后建立环流产生的数学模型，详细分析环流产生的原理。针对环流的特点，搭建环流抑制控制器。仿真结果表明，控制策略能够完成对系统的控制，环流抑制控制对环流有很好的抑制作用。

Research and application of a modular multilevel rectifier based on CPS-SPWM

There is a need to better match the source and load of an off grid micro grid and reduce the disadvantages of over reliance on prediction information of energy management. Based on the research and engineering practice of the SOC state change trend of an energy storage battery, a control strategy based on expert rules is adopted for different operation modes and scenarios, and the micro grid energy management system is fully utilized. Integrated data acquisition and processing ensures that energy management can not only control the stable power of the microgrid according to the range of the SOC, but also according to the strategy table. In practical engineering application, the control network of power control is designed reasonably to ensure the rapidity and accuracy of control. The control method achieves the power automatic control of photovoltaic, wind power and a heat storage boiler, and improves the accuracy and robustness of the off grid micro grid steady-state source load balance control. This work is supported by National Major Special Project (No. 2018YFB0904800) and Strategic International Science and Technology Innovation Cooperation Key Project of National Key Research and Development Program of China (No. 2020YFE0200400).