Research on Renewable Energy Consumption Evaluation Method Considering the Charging Load of Pure Electric Ships

The introduction of pure electric ships (PESs) has been an important means to promote energy conservation and emission reduction in the shipping industry. In order to evaluate the renewable energy consumption capacity of a port grid after the commissioning of different numbers of PESs, the charging load within a basin is subjected to probabilistic modelling to obtain the forecast result of the total load of port grid, and then a joint output probability distribution model for a wind power and photovoltaic power station is established in the present study. Based on this model, the load curve and conventional unit output are combined to obtain the renewable energy consumption probability space, and a probability convolution operation is ultimately performed to obtain the renewable energy consumption rate. Finally, based on a numerical example, the relationship between the number of ships commissioned and the renewable energy consumption rate of the port grid is estimated, which validates the feasibility of the method proposed in this paper and is helpful for determining the construction scale of renewable energy generation stations.