Research On The Automatic Solar Tracking System Of Wave Glider And Photovoltaic MPPT Algorith

With the development of ocean exploration platform,the wave glider has become an important tool for marine resource exploitation and cruise at sea.However,due to the limited power generation of batteries and solar panels,the control system,communication system and ocean exploration equipment of the wave glider can’t meet their urgent demand for energy when the power consumption is too large.Therefore,how to solve the energy problem of the wave glider is the key to improve its ability of ocean exploration and ocean cruise.To improve the power generation of the wave glider solar panels,a dual axis solar automatic tracking system is proposed in this paper,which is suitable for the navigation characteristics of the wave glider and improves the maximum power point tracking(MPPT)algorithm to efficiently utilize the limited solar energy.The main research work is as follows:Firstly,the structural composition and motion principle of the wave glider are introduced.Through the analysis and comparison of various solar tracking schemes,the structure of the dual axis solar automatic tracking system of the wave glider is designed,the calculation method of the solar trajectory and solar radiation model are given,and the control method of intermittently optimizing the trajectory of the solar panels is proposed.Secondly,based on the solar trajectory and solar radiation model,the energy output model of the solar panels along with the moving of the wave glider is derived according to the characteristics of the course mobility of the wave glider and the attitude motion of the float.The tracking trajectory is optimized by genetic algorithm,so that the solar panel can achieve the maximum energy output within a given time interval.At the same time,the energy consumption of the dual axis tracking system is analyzed.The relationship between the capacity of solar panels and the energy consumption of the tracking system is studied,the maximum net energy under different control strategies is analyzed,the optimal motion trajectory of the solar tracking system under the optimal adjustment time is determined,and a dual axis automatic solar tracking system is formed,which is suitable for the navigation characteristics of wave glider.Thirdly,the mathematical model of solar panel is established,the output characteristics of solar panel and the principle of maximum power point tracking are analyzed in detail,the common MPPT algorithms are classified and their existing problems are analyzed.To better solve the problem that it is difficult to take into account the tracking speed and power oscillation in the traditional MPPT algorithm,an improved increment conductance method is proposed.The search space of the power curve is limited by the algorithm,and the improved variable step size method is used to optimize the disturbance in the limited search space,and its response time and steady-state oscillation are reduced.Finally,the sea trial experiments of the wave glider are carried out to obtain the general law of the motion of the float under stable sea conditions.On this basis,the maximum net energy under different strategies is simulated and analyzed,the best tracking trajectory of the wave glider solar panel in one day is obtained.The existing installation methods are compared and analyzed in terms of incident radiation and energy gain.At the same time,the photovoltaic circuit simulation model is established,and the improved increment conductance method is compared with the traditional MPPT algorithm,which verifies the effectiveness of the proposed method.