Integrated Control Of Small Wind-solar Complementary Power Generation System Based On MPPT Algorithm

Due to the rapid growth of economy and population,the demand for energy is growing rapidly,and more and more countries are faced with energy shortage and environmental pollution.This problem has forced human beings into the stage of new energy development and utilization.At present,the most widely used new energy is wind energy and solar energy,but wind energy has randomness and solar energy has intermittently.By using wind-solar complementary power generation system,the combination of wind energy and solar energy enables most natural resources to provide stable and sufficient electric energy.The research object of this paper is a small wind-solar complementary power generation system and the tracking control strategy of its maximum power point is mainly studied.Finally,the maximum power tracking strategy of wind-solar hybrid controller is studied emphatically.The main research contents and results are as follows:(1)firstly,the maximum power point tracking control principle of photovoltaic power generation system is introduced,and then the MPPT control strategy of traditional photovoltaic power generation system is studied.Finally,the improved voltage method is proposed,and the improved voltage method control algorithm is improved on the basis of constant voltage algorithm MPPT.By improving the voltage method,the optimized constant voltage tracking method is proved,which overcomes the problems of low reliability and accuracy of the constant voltage method.(2)the maximum power point tracking control principle of wind power generation system is introduced.Then the traditional wind powerMPPT control method is analyzed in detail,and then the advantages and disadvantages of various algorithms are compared.Finally,the improved fuzzy PID control is obtained by improving the fuzzy control.The fuzzy PID control overcomes the influence of wind speed,that is,no matter what the wind speed is,the system can ensure the stability,and can accurately track the maximum output power point of the wind power generation system.(3)through the establishment of photovoltaic power generation system and wind power generation system simulation model,the simulation experiment results.The simulation results show a good effect.Finally,the simulation of the whole wind-solar complementary power generation system is carried out.The simulation experiment further verifies the effectiveness of the control strategy and system design of the system.