Research Based On Maximum Power Control Strategy Of Wind-solar Combined Generating System

The Maximum Power Point(MPP)captured of wind-solar combined power generation system has become an advanced research hotspot in the field of new energies.The Maximum Power Point Tracking(MPPT)algorithmcan not only improve the power output efficiency of PV system and wind turbine,accelerate the response time of the system,but also affect the efficiency of wind and solar energy and the safety performance of the MPPT algorithm directly.At present,the MPPT method has been applied to the actual products mainly by perturbation observation,incremental conductance method and intelligent control method.The statisticaldata show that the existing algorithm which has the disadvantages of poor anti-interference ability and dilatory tracking speed in practical application.Based on this,a new maximum power point tracking strategy is proposed to make the system output more efficient,more stable and faster.Based on the natural complementary characteristics of wind and solar energy,compared with independent wind andPV(Photo Voltaic)power system,wind-solar combined power generation system can greatly reduce the adverse effects of weather changes on the system,so that this new method has good output characteristics.This paper analyzes several common MPPT algorithms,summarizes the advantages and disadvantages of different algorithms,and improves on the basis of traditional control algorithms,proposes a new MPPT control method which is suitable for solar power system and wind wind power system.For solar power system,based on the traditional CVT algorithm in practical application of the advantages of easier implementation,but the method is susceptible to external environment and other factors,so that the system tracking accuracy susceptible to external conditions.Based on the traditional constant pressure control method(CVT)method,this paper proposes the method of voltage optimization,which can make the system trace to the maximum power point of the system under any condition,and solves the problem of low tracking accuracy in the system to a large extent.For wind power generation system,in order to realize the high output efficiency of wind power generation system under any wind speed,this paper proposes a new MPPT algorithm which effectivelyimproves the output efficiency of small wind turbine in various wind speeds.Althoughthe new MPPT control method proposed in this paperhas solved some defects existing in the traditional MPPT algorithm,the system output vibration is still large.In order to solve this problem,the theory of immune feedback response is introduced into wind-solar combinedgenerating system,the output line of system shows that the introduction of immune feedback response theory makes the system output amplitude decrease,and enhances stability of power system reliability,which has created the good social and economic benefits.