Research On Switching System Model And Control Method Of Energy Router

With the aggravation of energy shortage and environmental pollution,the development,utilization and grid connection of new energy have attracted worldwide attention,and the proportion of distributed generation in the power grid is also increasing.For this reason,relevant scholars have put forward a variety of ideas for future power grids,of which the energy Internet is an important one.The concept of energy Internet is mainly used to transmit and consume new energy.Compared with the traditional power grid,the energy Internet has higher requirements for power electronic converters,and the energy router is the core power electronic conversion equipment of the energy Internet Interconnection.The energy Internet manages and transmits energy through the energy router.The energy router can realize the transmission and conversion of power,the management of power quality,the two-way transmission of information,the optimal configuration of energy and so on.It determines the structure and operational characteristics of the energy Internet,and is one of the research hotspots in recent years.Using advanced power electronics technology to develop high-performance energy routers is the future development research direction.This paper studies the topology and control strategy of the energy router,analyzes the working principle of the energy router,and formulates the switching control strategy of the energy router.According to the characteristics of hybrid system of solid state transformer(SST)energy router based on advanced power electronics technology,the theory,method and technical problems involved in the switching control method of SST energy router are deeply studied.Firstly,the paper expounds the research background and significance of the energy router,introduces and classifies the energy router,and introduces the control status of the energy router.Then the hybrid system is introduced and classified.The topology of the energy router is determined according to the needs of end users.Then,according to the working principle of SST energy router and its hybrid system characteristics,the switching system model of energy router is established in modules,and the various operation modes and switching states of energy router are accurately described;Next,the switching control principle of the energy router is deeply studied based on the switching model.On this basis,combined with the space vector pulse width modulation technology,a multi-mode switching control method is proposed to realize the switching between different modes of the energy router through three-level switching control.Finally,the MATLAB/simulink simulation experiment is carried out.The simulation results show that the control method in this paper has the advantages of high tracking control accuracy,fast response,good dynamic performance and easy implementation.It provides a feasible and effective control strategy for the development of high-performance energy routers.The proposed handoff control strategy based on the hybrid handoff system model effectively achieves fast handoff and smooth handoff in the process of switching between different modes of the energy router.Based on this control strategy,the energy router has good dynamic and static response performance during handoff.The proposed switching control strategy is beneficial to the optimization of power quality.It is conducive to the optimal allocation of energy.