Current Control Schemes for Grid Following Inverter-based Onshore Electrified Ship

In the context of environmental conservation and sustainable development goals, the shipping industry is transitioning towards renewable energy sources instead of fossil fuels. Equipping ships with batteries and connecting them to the onshore grid through inverter-based resources (IBR) offers numerous benefits, such as reducing greenhouse gas emissions and optimizing energy use. However, ensuring the quality and stability of the electrical current when connected to the grid presents significant challenges. This paper compares three electrical current control methods: inverter-side control, grid-side cascade control, and grid-side single control, to enhance the quality and stability of the electrical current from ship batteries when connected to the onshore grid (grid-following inverter) under both strong and weak grid scenarios. The model, developed through simulation using the Energetic Macroscopic Representation (EMR) method, provides valuable insights. The results of this study will aid in selecting appropriate control methods for ports, promoting the widespread adoption of sustainable practices in the shipping industry.