Härtill 4 uppsatser

Diss. Trondheim : Norges teknisk-naturvitenskapelige universitet, 2025

The maritime industry is currently in a crucial phase, transitioning away from carbon-based fuels towards low-emission and green alternative fuels, due to the existing and emerging International Maritime Organization (IMO) regulation that limits harmful emissions. Although hydrogen and fuel cells (FC) are highlighted as potential solutions for decarbonization, their integration on board marine vessels is still in its infancy; primarily because of the high costs involved. To accelerate the adoption of hydrogen FCs on board vessels and to render hydrogen FCs economical, an optimal marine hybrid power system model, smart integration schemes, and operation methods are needed. Electrification and hybridization with DC power system topology along with advanced power electronics are under development for FC-powered vessels. During the design stage, the challenges in maintaining stability and mitigating oscillations caused by power electronics-based DC power distribution systems need to be addressed. The main objective of this Ph.D. research is to develop a dynamic model for the hydrogen FC-powered vessel and analyze its performance. To achieve optimal operation of the FC and battery-based marine hybrid power system, the system-level model is developed with MATLAB/Simulink platform. A hardware-in-the-loop plant has been set up to replicate the behavior of the real-time system and to validate the feasibility of the developed model and the design of the marine hybrid power system.