Integrated Energy Systems for Green Ports; A Cost Model and Case Study

In this paper, an integrated port energy system is described and modeled based on cost modeling and including practical constraints. The model uses simulated power data to operate an energy management system (EMS) with shore power and a port energy storage system (ESS) for a green port. Based on the calculated electricity costs, the optimal power output of the energy management system is established such as the rating of the power sources and sizing of the ESS. In the next step, the model is used for system optimization of operating expenses and to improve the availability of the onshore supply system by adjusting the energy sources based on the renewable energy sources (RES) available and the state of charge of the on-shore battery. Finally, the optimal power output profiles of an EMS change based on the availability of RES generation during a sunny and cloudy day. Further, this integrated energy system can be adapted for future green ports supplying multiple vessels with various energy sources such as Liquefied Natural Gas (LNG), ammonia, and hydrogen.