A new voltage control method for DC grid in distributed generations

The interest of Distributed Generations has been increased significantly now based on renewable resources in the world. This paper describes a kind of voltage control method of DC grid in distributed generations' system. The proposed control method can autonomously realized that the DC grid voltage is set by the different voltage references with little communications in different conditions of loads' power, the output power of renewable resources and the status of energy-storage units, and that the system power balance is maintained. The simulation results verify the performance of the proposed method.