Abstract
Energy management strategy is a key technology of hybrid power ships. In recent years, renewable energy ship technologies have become a popular research field and one promising development direction to realize reasonable utilization of energy resource, as well as energy conservation and emission reduction. Among these technologies, the solar energy hybrid ship technology is currently attracting attention all over the word. In this paper, a 5000-car space solar energy hybrid ship is used as the research objective, and an energy management strategy that is based on fuzzy logic is proposed to distribute the ship power generation, solar energy, and battery output power according to the ship’s electrical load demand, and the fuzzification and stochasticity of solar energy. By comparing the simulation results with real ship testing results, it is identified that the proposed fuzzy logic energy management strategy can optimize the operation conditions of individual power generation sources, improve the overall performance of power system, and reduce the ship’s overall fuel consumption.
Highlights
Shipping is considered as one of the most economical transportation ways in the world and it has played an important role in the development of world economy
The results showed that the fuzzy logic control strategy could improve the system efficiency and life time
The results showed that the optimized full-load current (FLC) input, i.e., the battery and grid power demand, could minimize the loss of system power and reduce the energy consumption
Summary
Shipping is considered as one of the most economical transportation ways in the world and it has played an important role in the development of world economy. In the 21st century, the energy used by ships must be sustainable [1]. Extensive research has been conducted on the application of clean energies, such as liquefied natural gas (LNG), fuel cells, wind energy, and solar energy on ships, and many remarkable results have been achieved. As primary energy sources, clean energies, such as LNG and solar energy, cannot be directly applied to electrical equipment or power equipment on ships, but have to be converted into electrical energy or other secondary energy sources through energy conversion devices. When considering the differences in terms of ship structure, navigation areas and operating characteristics, the hybrid ship technology based on the comprehensive utilization of multiple energy sources has triggered a new round of research boom [2]
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