Research And Development Of Energy Management System For Micro-grid Of Hybrid Small-Power Ship

With the rapid development of the aquatic tourism industry,the demand for sightseeing-ship in inland river scenic spots and coastal scenic spots is increasing.The environmental pollution caused by traditional sightseeing ships is becoming increasingly serious.In order to reduce environmental pollution caused by sightseeing ships,the small hybrid powersightseeing ships,which use photovoltaic cells,lithium batteries and diesel generators as power sources andcombined with the electric propulsion system,have emerged as the times require.At the same time,as a ship micro-grid based on photovoltaic-Diesel Generator-Battery,it has typical characteristics different from the terrestrial power grid,both in terms of physical structure and grid characteristics.On this special application platform,the characteristics of the paralled operation between the new energy inverter power system and diesel generator,the influence on the power quality,the operation characteristics of thenetwork of ship,and the reliability of the micro-grid system,etc are necessary to be studied.Therefore,aiming at the small hybrid ship power system composed of photovoltaic cells,lithium battery packs and diesel generators as power supply units,this paper studies a hybrid ship energy management control system and its control strategy by referring to the research results of terrestrial micro-grid and combining with the characteristics of hybrid ships.The main work was as follows:1.Analyzed the power supply unit and power conversion device ofhybrid power system.The reasonable topology structureand operation mode of hybrid power system is designed.2.The parallel method of the inverter power supply and diesel generator in the ship micro grid was designed,and the dynamic power distribution strategy was proposed.The simulation model of the hybrid power ship micro grid system was established in the Matlab/Simulink,and the proposed energy management strategy was verified by simulation.3.According to the design requirements of hybrid power cruise ship,the energy management system of hybrid power ship is developed.The communication and monitoring system is designed,and the information interaction from PLC and battery pack,inverter power supply,diesel generator and intelligent instrument is realized,and the system monitoring human-computer interaction interface is developed.4.Experimental data analysis.Under different operating conditions,the system is tested,and the experimental data are processed and analyzed to verify the effectiveness of the proposed energy management strategy.