Development of Integrated Shipboard Microgrid for Simultaneous Realization of Emission Reduction and Carbon Neutrality

This paper presents a shipboard microgrid architecture aimed at reducing greenhouse gas emissions, mitigating environmental pollution, and improving energy efficiency. Despite global decarbonization efforts, maritime transport remains heavily reliant on diesel and other oil-based fuels, and these fuels are expected to continue being used for diesel engines even as alternatives such as hydrogen, ammonia, and liquefied natural gas (LNG) are gradually introduced. Conventional shipboard power systems often operate at low generator load factors, resulting in poor fuel efficiency and significant emissions of nitrogen oxides (NOx), sulfur oxides (SOx), and particulate matter (PM). The proposed microgrid integrates multiple energy sources with advanced control strategies to optimize power flow, enhance generation efficiency, and enable effective exhaust gas treatment. By providing stable onboard power while reducing greenhouse gas (GHG) and pollutant emissions, the system supports practical implementation of cleaner fuels and contributes to carbon-neutral, sustainable maritime operations.