Research on Control Method of Ship Integrated Power System Based on Load Current Feedforward

Aiming at the problem of DC bus voltage fluctuation caused by high-power load switching in ship integrated power system, this paper proposes a source-storage coordinated control strategy based on load current feedforward. Initially, the largesignal stability analysis of the microgrid is carried out, and the stability boundary of the system is obtained to design the system parameters. Then, based on the load current feedforward method, the load current is decomposed into different frequency components according to the characteristics of the generator and the energy storage, so that the power generation system and the energy storage system can cooperate to mitigate load disturbances and suppress the fluctuation of the bus voltage. Finally, a detailed simulation model of ship microgrid is built. Through simulation verification, this method can improve the dynamic response speed of the control loop, enhance the load-carrying capability of the system, and reduce the DC bus voltage fluctuation from 7.8 % to less than 0.5 % when the load power changes suddenly.