A Method for Autonomous Power Balance of DC Microgrid with Photovoltaic and Storage System

Abstract

DC microgrid with photovoltaic and energy storage has been attracted widespread attention due to its high reliability and flexibility. In order to solve the problem that the power of DC microgrid cannot be self balanced due to the no uniformity and uncertainty of the output of photovoltaic power in the photovoltaic DC storage microgrid. In this paper, a power balance control method based on the DC bus voltage signal autonomous switching mode is proposed, this method can effectively stabilize the power fluctuation and maintain the power balance in the network, and enhance the safe and reliable operation ability of the optical storage DC microgrid. Finally, the feasibility and effectiveness of the proposed control method are verified by experiments.