Application Of Wind And Solar Hybrid Device To Ship Power Supply System

Because of the lack of traditional fossil fuel and the increasing y serious pollution caused by its burning,low-carbon and environmental protection has become the focus of people.Under this circumstance,the shipping industry begins to pay attention to the fuel saving and the reduction of harmful emissions.Research on the application of new energies including solar energy and wind energy to the ships thus have drawn great attention of the society since they are characterized by zero pollution and wide distribution.In order to explore the application of wind-solar hybrid devices to ships and improve their conversion efficiency,this paper studies the maximum power point tracking of solar and wind energy as well as the yaw control system of wind driven generators.Firstly,the basic features and distributions of solar energy and wind energy have been studied,and ways to use them in ships are summarized according to the environment of the sea.Comparing the features and principles of the existing maximum power point tracking(MPPT)in photovoltaic(PV)power generation system,the control strategy based on the integration of hybrid particle swarm and frog leaping algorithm and perturbation observation method is proposed.Then the tracking system is analyzed,and a fixed tracking method for a horizontal installation suitable for ship navigation is proposed on the comparison of existing tracking methods on land and environment of the sea.In view of the nonlinearity and complexity of offshore wind energy in wind power system,the control strategy of photovoltaic power generation system is not suitable for wind power generation system,therefore,a control strategy combined with fuzzy control and variable step-size perturbation observation is proposed in terms of maximum power point tracking.In case of wind direction changes more than 12° in the yaw system,the control strategy wind vane control is used,while when the wind direction has a small range of changes,it is controlled by the hill-climbing searching method.Finally,the models of PV array,wind-driven generator maximum power point tracking control and yaw control are built in the MATLAB/Simulink.The feasibility and effectiveness of the maximum power point tracking control and the yaw control strategy for Wind and Solar Hybrid Power Generation System are verified according to the analysis of the simulation model.