首先分析了带光储的模块化电力电子变压器(modular multilevel converter power electronic transformer, MMC-PET)在配电网中的优越性和MMC-PET对新能源接纳的优势,设计了一种模块化电力电子变压器新型拓扑结构,采用一种三重化的DC/DC变换器作为储能系统的接口,并提出一种储能变流器的协调控制,其中光储系统通过模块化电力电子变压器的低压直流母线接入,其次对模块化电力电子各级控制器和光储的变流器控制器进行设计,最后利用Simulik进行仿真,其仿真结果验证了带光储系统的模块化电力电子变压器的技术优势。
英文摘要:
Firstly,the superiority of the modular multilevel converter power electronic transformer (MMC-PET) with photovoltaic power generation and energy storage and MMC-PET for new energy sources is analyzed in the distribution network. A novel topology of modular power electronic transformer is designed,and a kind of three heavy DC/DC converter is used as interface of the energy storage system. And a coordinated control of energy storage converter is proposed. The photovoltaic power generation and energy storage is connected to the low voltage DC bus through MMC-PET. Secondly, the controller of MMC-PET, photovoltaic power generation and energy storage is designed. Finally, the simulation is carried out by Simulink, The simulation results verify the technical advantages of the MMC-PET with photovoltaic power generation and energy storage.