Design And Simulation Of Direct-drive Permanent Magnet Wind Power Generation System Controller

As traditional energy crisis caused by the combustion of fossil fuels and Environmental threats,it is a generous trend to focus on developing renewable resource.Wind energy is a kind of clean and no secondary pollution,efficient energy security and stability.At present,the rapid development of wind power technology permanent magnet direct drive wind power system due to its advantage of simple structure,wind energy utilization,and the lower failure rate,high reliability and are widely used.Therefore,the use of appropriate The control countermeasures of wind power system is critical.This paper focuses on the permanent magnet direct-drive wind power system-side and network-side converter is a study.First,the article describes the world and China’s wind power research current situation and future trends;permanent magnet direct-drive wind power system converter technology for the analysis,combined with the characteristics of Permanent magnet direct-drive wind power system combined dual PWM converter as a superimposed carrying the direct-drive wind power system topology.The second,built on back to back double full-power PWM converter mathematical model of Magnetic drive wind power system,understanding the operation of the permanent magnet direct drive mechanism of electric power system and its control strategies in order to follow each stage of the study to provide a more good theoretical support to facilitate the smooth implementation of the various stages of various stages.Third,to abandon the traditional PID on the permanent magnet direct drive wind power generation system using the control strategy,the non-singular terminal sliding mode control loop speed control strategy is applied to the side of the machine.At the same time in order to suppress the occurrence of chattering,will use second-order terminal sliding mode control.Finally,computer MATLAB simulation platform to verify the correctness and feasibility of the control strategy.Fourth,Analysis of magnetic direct-drive wind power system network controller policy side,the traditional voltage loop PI control strategy,current loop variable structure control strategies by understanding the working principle of network side,select the appropriate sliding mode surface,design appropriate sliding mode control strategy is proved by Lyapunov stability control strategy,simulation experiments on MATLAB simulation platform to verify The accuracy and efficiency in the control counter measures.