A Study on a Multi-Input/Output Power Supply System that can Improve Energy Operation Efficiency and Reduce Greenhouse Gas Emissions in small ship

• Main Authors: Kim, Dong-Wook, Lee, Kyung-Hwan, Kim, Jong-Gyu, Shin, Duck-Shick, Ha, Tae-Jin, Lee, Ju-Wan
• Format: Conference Proceeding
• Language: English
• Subjects: energy operation efficiency; Fossil fuels; Generators; Greenhouse effect; greenhouse gas (GHG) emissions; Marine vehicles; multi-input/output power supply system; Power conversion; Power supplies; Power system stability
• ISSN: 2642-5513
• DOI: 10.23919/ICEMS52562.2021.9634276

In this paper, a multi-input/output power supply system that can improve energy operation efficiency and reduce greenhouse gas (GHG) emissions, instead of auxiliary engines or generators driven by fossil fuels to supply electric power in small ship is proposed. The proposed power supply system is largely divided into multi input sources and multi output sources that can be linked to the energy storage system for small ship. The multi input sources consist of a Grid converter, a PV converter and a Generator (Gen) converter, and then the multi output sources consist of an inverter for driving an AC load and a converter for driving a DC load. In order to verify the effectiveness and usefulness of the proposed power supply system, it is designed to achieve higher performance than the conventional system, and each system constituting the multi-input/output power supply system can be operated in connection with the energy storage system. Through the experiment, it was confirmed that each system had excellent characteristics according to the design specification, and in particular, it was confirmed that the power conversion efficiency of the developed system was improved by about 3.6% on average compared to the conventional system. In addition, each developed system was integrated into one system, and output stability according to various operating modes was verified through interlocking experiments. In other words, it is expected that by improving the energy conversion efficiency of the proposed system instead of using auxiliary engines or generators, it is possible to improve energy operation efficiency and reduce GHG emissions.