Abstract
Because of the advantages of energy-saving and emission-reduction, green ships have attracted wide attention from all over the world. At present, the use of renewable energy for all or part of the ship's power supply equipment research, most of the reference or apply the research experience of terrestrial photovoltaic system. In real sailing, the ship's attitude will change over time because of ocean winds, waves, current and the ship's moving and rocking. Due to these factors, the irradiance on the ship PV panels is changing with time. The fluctuating power caused by the moving and rocking of ships will also change. In this paper, we presents a new idea of applying a virtual synchronous generator (VSG) technology to a ship, which can stabilize the partial fluctuation power caused by the moving and rocking of the ship. The VSG control strategy can show the characteristics of the synchronous generator (SG) by controlling the distributed power supply. Through virtual inertia and damping links of the VSG to stabilize the fluctuations caused by photovoltaic panels' moving and rocking on the deck. Here illustrate some key process in this paper. Firstly, considering factors such as wind, wave and flow, the model of photovoltaic power generation in ship is established. Secondly, the VSG is introduced into the solar ship and the virtual inertia and damping coefficient in the VSG are designed by the actual situation. Thirdly, combining the discussion of the actual route from Shanghai to Sydney, simulations are used to verify the effectiveness of the method. Through the above method, not only the volume of the energy storage device and the number of charging and discharging times can be reduced, but also precious ship space can be saved and the stability of the power grid can be improved. New energy power generation equipment can approach the ship power system similar to the SG. Drawing on the experience of the SG power supply system, new energy can be better integrated into the ship power station for management and control.
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