Research on the Control Strategy of Ship Shore Power Supply based on Improved VSG
In order to solve the problem of frequency oscillation and voltage drop caused by irregular load start and stop during the ship's berthing period,a control strategy of ship shore power based on VSG which comprehensively considers frequency and voltage is proposed in this paper.Firstly,adaptive inertia control is added to realize automatic matching in the control strategy,therefore the frequency oscillation of the system can be suppressed.Secondly,feedback control is applied to improve the reactive-voltage link in the control strategy,so the system's voltage drop can be corrected.Finally,in order to verify the effectiveness of the control strategy,an improved VSG simulation model is built in MATLAB/Simulink to comprehensively analyze the influence of frequency and voltage on the system in this paper.The simulation results show that the proposed control strategy can realize uninterrupted connection between ship and shore power,and can ensure the stable operation of the system.It is superior to the original control mode in suppressing frequency oscillation and correcting voltage drop.
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