论文标题
基于MMC的光伏系统的最大功率点跟踪
MMC-Based Distributed Maximum Power Point Tracking for Photovoltaic Systems
论文作者
论文摘要
本文提出了基于模块化多级转换器（MMC）的网格连接光伏（PV）系统的新拓扑。在此拓扑结构中，通过DC-DC升压转换器具有最大功率点跟踪（MPPT）控件，将PV阵列连接到MMC的每个sumpoule（SM）的电容器（SM）。在部分阴影条件下，该拓扑将最大化系统的效率，因为它可以独立于彼此独立地调节SM电容器电压以实现分布式MPPT。模型预测控制用于跟踪交流输出电流，平衡SMS电容器电压并减轻循环电流。在正常操作，部分阴影和PV阵列失败下，通过MATLAB/SIMULINK工具箱验证了具有7级MMC系统有效性的PV生成拓扑。
This paper proposes a novel topology for grid connected photovoltaic (PV) system based on modular multilevel converter (MMC). In this topology, a PV array is connected to capacitors of each submodule (SM) of the MMC through a DC-DC boost converter with maximum power point tracking (MPPT) control. This topology will maximize the efficiency of the system in the case of partial shading conditions, as it can regulate the SM capacitor voltages independently from each other to realize distributed MPPT. A model predictive control is used to track the AC output current, balance the SMs capacitor voltages, and to mitigate the circulating current. The proposed PV generation topology with 7 level MMC system validity has been verified by simulations via MATLAB/Simulink toolbox under normal operation, partial shading and PV array failure.
