Research on a household energy router for energy internet

Energy router based on power electronics technology is the key equipment to build Energy Internet and realize the flexible transformation of power and the operation control of DGs. In this paper, a cascade structure of household energy router circuit is applied, of which the former converter can achieve bi-directional power flow, the DC link realizes the access of DGs, energy storage plug and play, and the latter converter can supply for AC loads as well as connect to grid. The mathematical model of the former and latter converter is established respectively, and the coordinated control strategy of household energy router are proposed, and the power distribution characteristics of household energy router are analyzed. Then a typical application scenario of the household energy router for low-voltage and small-capacity users is established. The correctness and effectiveness of the proposed Energy router topology and control strategy are verified by simulation and experiment, and the requirements of low-voltage and small-capacity load zone will be effectively satisfied.