Research On Maximum Power Control Scheme Of Wind Turbine

How to make the wind power system always maintain or close to the maximum power point,has become the key to the efficient use of wind energy.In this paper,the maximum power point tracking technology of wind power generation system is the core research content,and the main research work is carried out:Firstly,the performance of the wind power generation system and the fan are analyzed.The structure of small wind power generation system is presented,including fan assembly,generator assembly and battery assembly.The advantages and disadvantages of vertical fan and horizontal fan are compared,and the composition of fan system is analyzed.The performance of the fan is analyzed,including the force analysis of the fan blade,the construction of the fan power model,and the analysis of the wind speed power curve of the fan,and the necessity of the maximum power point tracking control technology for the efficient operation of the wind power generation system is expounded.Secondly,aiming at the maximum power point tracking problem of wind power generation system,the traditional climbing algorithm is improved,and a new algorithm is designed.This paper analyzes the basic principle of hill climbing algorithm,the influence of two key problems of searching step size and search direction on the efficiency and accuracy of hill-climbing algorithm.The improved hill climbing algorithm is designed by introducing the related parameters of environmental conditions.In the improved hill-climbing algorithm,four cases are considered respectively,and the step size of the left search and the right search is adjusted flexibly by two parameters,and then the search direction is controlled by two parameters.Finally,the circuit design of the small wind power generation system based on the direct drive permanent magnet generator is carried out.The design and performance analysis of the three interleaved boost circuit in the main circuit are focused on,and the design basis of inductance parameters and capacitance parameters are given.In the Matlab\\Simulink simulation environment,respectively,based on the traditional hill-climbing algorithm,variable step hill-climbing algorithm,this paper improved hill-climbing algorithm simulation module design,set up the simulation experimental conditions,three kinds of algorithm of output power of wind speed changes under the control performance and duty cycle comparison.The simulation results show that the improved hill climbing algorithm has the best effect on the maximum power point tracking of small wind power generation system.