1带光储系统的配电网MMC-PET - 电测与仪表.DOCVIP

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 袁威，郝正航，张宏俊 （贵州大学 电气工程学院，贵阳 550025） 摘要：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。 关键词：模块化电力电子变压器；能量路由器；协调控制；前馈解耦控制 中文分类号：TM93，TM46 Simulation research on the modular power electronic transformer with optical storage system in the distribution network Yuan Wei, Hao Zhenghang, Zhang Hongjun (Department of Electrical Engineering, Guizhou University, Guiyang 550025, China) Abstract: 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 triple 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, simulation 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. Keywords: MMC-PET, energy router, coordinated control, feed-forward decoupling control0 引言 电力电子变压器（Power Electronic Transformer，PETPET具有以下突出优势：体积小、高低压直流母线具有新能源并网及直流供电条件、潮流可控、能实现一次侧单位功率因数运行的功能、可改善电力系统的动态特性及优化智能配电网的潮流等[2-3]。在配电网中，电力电子变压器还具有“能量路由器”的功能，是未来能源互联网络的中枢神经，实现分布式能源的高效利用和传输的电力设备，但由于不具储能系统，不具备应对电压深度跌落的功能和不利于光伏的接入。 带光储系统的模块化电力电子变压器，由于存在储能和光伏发电系统，通过协调控制可实现应对电压深度跌落和光储互补功能，储能环节解决了光伏系统间隙性发电对配电网的影响，提高配电网对新能源的消纳能力，减少弃光概率 [4-6]。本文设计了一种带光储系统的模块化多电平电力电子变压器[7-8