Power distribution strategy of the energy router based on energy storage multi-mode operation

A new topology of the energy router is proposed in this paper to achieve a richer power distribution scheme, which contains DC interface, DC energy storage, loads, photovoltaic power generation and other equipment. A power control algorithm based on droop control of the DC bus is proposed to solve the problem of frequent fluctuations of the power and unstable of the DC bus voltage caused by access of the multiple devices. This algorithm realizes the adjustment to the working mode, the direction of the power flow and the value of each unit according to the bus voltage to ensure that the energy router realizes the voltage constant and the power balance of the DC bus without affecting the operation of each device. Characteristic of “resource” or “load” for ER and storage can be switched adaptively, and dynamic power regulation is achieved by droop control. Droop control for “resource” and “load” is similar to the characteristic for “generator-load” in conventional power system, whose purpose is to restrain the power fluctuation and to realize the stable control of dc bus voltage. Finally, according to the proposed topology of the energy router and the control strategy, the simulation is carried out on the MATLAB platform to verify the analysis.