带光储系统的模块化电力电子变压器在配电网中的仿真研究

Simulation research on the modular power electronic transformer with optical storage system in the distribution network

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。

Firstly, the superiority of the modular multilevel converter power electronic transformer （MMC-PET） with solar power systems and energy storage, and the advantage of MMC-PET for new energy sources are analyzed in the distribution network. A novel topology structure of modular power electronic transformer is designed, and a kind of tri- ple DC/DC converter is used as interface of the energy storage system. And a coordinated control of energy storage converter is proposed. The solar power system and energy storage are connected to MMC-PET through the low voltage DC bus. Secondly, the controller of MMC-PET, solar power system and energy storage are designed. Finally, simula- tion of the method is carried out by Simulink, and the simulation results verify the technical advantages of the MMC- PET with solar power systems and energy storage.