Research on Constant Power Control Strategy of Marine Propulsion Converter under High Sea Conditions

Under the conditions of strong wind, waves and high sea conditions, due to the intense movement of the ocean current, the propeller is frequently subjected to short-term high torque impact load, which causes a large fluctuation in the power generation of the electric propulsion marine power generation system, which is not conducive to the stability and economy of the diesel generator set. After the theoretical analysis of permanent magnet synchronous motor control, this paper proposes a kind of power and current double closed-loop constant power control strategy based on power feedforward, and gives a design example and test verification. The test results show that the constant power control strategy shows good dynamic performance, which can effectively reduce power ripple at the input end of the propulsion converter under high sea conditions, and make the diesel sets run efficiently.