Seamless Power Supply Strategies for A Ship-Controlled Inverter System

This paper studies a seamless power supply strategy for a ship-controlled inverter system, which is installed on the ship and includes rectifiers, inverters, the storage battery. Based on the V/f control and the P/Q control, an improved software phase-locked method is proposed by combining the working characteristics when the operating mode is switching to guaranteed the continuity and stability of grid voltage phase under all kinds of switching conditions, which can lay a solid foundation for seamless switching of different operation modes and optimize controls’ parameters. Finally, a platform of simulation experiment for switching operation modes between ship generator and rectifier (power storage)-inverter is established. The results of simulation and experiment prove the efficiency and superiority of the seamless power supply strategies for the ship-controlled inverter system.