Simulation And Research On Power Control With Energy Storage System In DC Power Grid

With the development of ship power grid,the relation between supply and demand of the power requires it with the characteristics of safety,succession and smoothness,thus which prompts the research of the power control technology.On account of the usage of the high-power pulse load in the ship has been more and more general,which impacts the ship power on the slide.Using energy storage systems in the vessel integrated power system(IPS)can available improve the energy construction and increase the economic efficiency.At the background of the research of the DC IPS,the page does some study which aims at enhancing the efficiency of the ship power grid by using battery and super-capacitor in hybrid for the high-power pulse load in the ship.The Bi-directional DC/DC converter in the ship power system connects the energy storage and discharge process and plays a significance role at the process of charge-discharge about energy storage,which is one of key equipment in the system.Due to the special requirements of the pulse load,the DC/DC converter should be stable and continuous.Therefore,the page studies the control policy of the DC/DC converter based on the output characteristic to realize sequentially stable and small loss.Through the analysis investigation about the charge and discharge characteristics of battery and super-capacitor,and the external characteristic of pulse load,the model of battery,super-capacitor and pulse load can be established,respectively.Analyzing the structure and working mode of the ship power system and the hybrid energy storage system,the topological structure would be selected which is the full-bridge isolated bi-directional DC/DC converter formal,and its parameter would be able to project.To study the phase shift control method of the dual-active-bridge DC/DC converter,the key point would be the role of dual phase shift(DPS)control in the decrease of back-flow power and losses in the system.Finally,the differences between the control effect of dual phase shift(DPS)control and traditional single phase shift(SPS)control in converter is compared and studied,which is under the Matlab/Simulink environment.With the comparison study of the experiment shows that theDPS control method has better starting and dynamic performance and it will have better application prospects.