Research On Control Strategy Of Distributed Power Router

With the development of the penetration rate of new energy generation,the elements in the power grid are increasingly complex,and a variety of DC electric equipment such as large-scale energy storage,charging piles and electric vehicles gradually appear.At the same time,China's electric power operation still continues the characteristics of traditional electric power,with the flow direction of power flow keeped one-way operation,and traditional centralized control method is difficult to ensure the stable operation of the entire electric power system and unable to meet the personalized needs of users.To solve these problems,the concept of energy Internet emerged.Compared with the traditional power grid,the energy Internet applies more abundant power electronic technology and information technology,which can accept a variety of energy forms and realize intelligent energy management.As the core device of energy Internet,power router can realize multi-type energy,multi-type load energy interconnection and information exchange.In this paper,in the case of access of different types of power units,the overall architecture,coordination control method and scheduling strategy of the power router are studied,and the flexible scheduling and stable operation of power are finally realized.Firstly,basing on the basic function of power router,with the demand of different access unit,using the bus exchange of energy transport,this paper designs power router overall architecture and introduces the power conversion module,the intelligent control module,communication module,setting up the mechanism of internal and external communication power router,laying a foundation to realize power router interaction energy and scheduling.Secondly,the power router modeling is carried out,the photovoltaic and energy storage units connected to the power router are designed in general,and the topological structure of each unit is constructed.Based on the characteristics of each functional unit,the corresponding control method is established,and the simulation model is built in MATLAB/Simulink to verify the feasibility of each unit control strategy.Moreover,this paper divides power router working mode and establishes control method.At the same time,in order to improve the power router running stability,in view of the distributed energy pumping it intermittently and loading input and removal characteristics of randomness,this paper designs the PCC point smoothing,timing charge and discharge scheduling strategies,making MATLAB simulation model and building electricity routers to validate the feasibility and scheduling policy operating mode.Finally,the experimental platform of the power router is built,and the platform is used to conduct experiments on the working mode and scheduling strategy of the power router.By analyzing the experimental waveform,it is proved that the power router in this paper could operate stably and carry out the scheduling experiment smoothly,so as to realize the flexible flow and scheduling of electric energy among various ports.