This paper is to develop a coordinated control strategy of a ship with hybrid power and evaluate on the energy efficiency and emissions reduction of the case ship. The hybrid power system consists of 4-stoke diesel generator, solar panels and battery packs. A micro-grid power system was structured to offer an optimal combination of the three power sources in terms high efficiency and low emissions of the overall system. The control requirements for the developed micro-grid power system were analysed according to the principles of priority to use renewable energy. A power distribution control strategy was designed by applying the logic threshold method. A system simulation model was established and the simulation was carried out with MATLAB. An experimental test rig was built to evaluate the simulation results and develop the control system. The developed marine micro-grids power system has been applied on a case ship and run stably. Compared with the conventional power system, the performance of emission and economic of the hybrid system is studied with the case ships. The results of case ship and experimental have shown that the developed hybrid micro grid system can be managed effectively by the proposed control strategy. The emission of CO2 is dramatically decreased in any cases and the energy cost is reduced considering for the ship life-cycle.
Ocean Engineering – Elsevier
Published: Aug 15, 2018
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