| With the rapid development of the wind power industry,offshore wind power and large-scale wind turbines have become the future trend,while also bringing greater challenges to the operation and maintenance of wind turbines.As the key part of the wind turbine transmission chain to bear the load of the wind turbine,the quality of its working characteristics is the basis that directly affects the safety,stability and reliability of the wind turbine.Therefore,before completing the manufacture and installation of wind turbines,in order to improve the stability and reliability of wind turbines,it is necessary to conduct simulation tests on the performance and reliability of its transmission chain.The wind turbine drive chain test platform uses the hydraulic loading system to simulate the wind turbine load,and can complete the fatigue test of the key components of the wind turbine on the ground.Through the experimental results,the various parts of the wind turbine are designed,and the operating conditions of the turbine’s main shaft and parts under torque and vibration are detected on the wind turbine test bench,which greatly reduces the difficulty and cost of wind turbine operation and maintenance.This paper takes 1MW wind turbines as the research object,designs the test platform of the wind turbine transmission chain,and analyzes the load received by the wind turbine in operation and its related load theory,and analyzes the actual conditions of the wind turbine The load received is resolved into six degrees of freedom.Based on the load analysis of the wind turbine,taking the singlecylinder hydraulic system as an example,the parameters of the hydraulic cylinder servo valve are analyzed and calculated,and the mathematical model of the valve-controlled hydraulic cylinder of the wind turbine transmission chain test platform is established according to the required parameters.Its stability is verified in MATLAB,and finally the hydraulic loading system is simulated in MATLAB.Since the wind turbine test platform needs to simulate the wind load in real time and must improve its system response speed,particle swarm algorithm is added to optimize the traditional PID control method,and the particle swarm PID controller is designed.The controller is used as the control link in the hydraulic loading system,through which the servo valve is controlled.Through the simulation of the single-cylinder hydraulic loading system,it is verified that in the hydraulic loading system,compared with the traditional PID controller,the particle swarm PID controller has greatly improved the control accuracy,response speed and stability of the system.The hydraulic loading system is experimentally researched,and the hydraulic loading system experimental platform is built by designing the software and hardware of the hydraulic loading platform.At the same time,a human-computer interaction interface was designed,and the upper computer hydraulic system data acquisition software was developed using the graphical programming tool Lab VIEW,including the system flow,hydraulic cylinder inlet and outlet pressure,etc.,so that the data in the test platform was displayed in real time.After the design of each part of the system was completed,debugging was carried out.From the debugging results,the valve control force feedback system works reliably,with high control accuracy and good performance. |
