Study On Control Mechanism With Lidar Test Technology To Improve Power Output Of Wind Turbine

Wind energy has the most important position in the renewable energy because of its abundant resources.However,due to the unpredictability of wind energy,its prediction and utilization are somewhat challenging.Therefore,high performance control system is needed for wind turbine.Among them,the variable rotor system of wind turbine plays a key role in realizing the required blade angle and making the generator operate at its rated speed.Centrifugal and gravity loads on the blades of wind turbines cause wear and tear,resulting in reduced power output and equipment life.Therefore,a pitch angle control is required that,in addition to providing maximum power output,can reduce load effects.Usually,feedback control methods are used,so a system to measure wind speed and direction before reaching the unit is needed to improve the responsiveness of the control system.The research is divided into the following aspects:(1)Discussed the development trend of wind turbine control technology,wind turbine power optimization and generation increase,is the key technology that must be solved by the wind power industry,around the wind power on the variable speed and variable pitch control to carry out the research of power generation technology.(2)Discusses the wind turbine modeling theory and method,completes the wind turbine system design and model construction in the simulation software(MATLAB,GH Bladed).MATLAB model,linearization model and difference equation model of wind turbine are presented respectively.(3)The variable rotor power control simulation based on the MATLAB wind turbine model is studied.Because the MATLAB model of the wind turbine is a static model,its control simulation is affected by the inaccuracy of the model,and the control results have certain defects.(4)The simulation in MATLAB is improved,and the fuzzy variable rotor PID control technology is proposed to eliminate the influence of the non-linear system operation control on the output power.The parameters of the said controller are optimized by using different technologies,and the parameter tuning method based on the fuzzy PID controller is obtained.The simulation results of fuzzy PID control method are obtained.(5)Inclusion of predictive control technology in fuzzy control system,the response characteristics of the research for the power output of wind turbines,and using the rotor speed as the input of fuzzy control system,to join the feedforward predictive control.fuzzy control system for better power output,compare the output of fuzzy controller and the conventional controller,It is found that the improved fuzzy control algorithm can get the optimal power output.(6)Particle Swarm Optimization(PSO)technology is studied,combined with FMINSEARCH to obtain the best parameters of PID controller.Simple PSO technology cannot solve the nonlinear and uncertain problems of wind turbine system.The proposed technique reduces the system setup time and makes it more stable.(7)Based on the LiDAR wind measurement and prediction control technology,the LiDAR model is established,and the above control strategy is used for simulation to verify the superiority of the method.