Based on the control scheme of force and position, the controlling andtesting system of metal V-belt type CVT is developed. Having taken account of the complex nonlinearcharacteristics of the CVT shift dynamics and th...Based on the control scheme of force and position, the controlling andtesting system of metal V-belt type CVT is developed. Having taken account of the complex nonlinearcharacteristics of the CVT shift dynamics and the saturation and nonlinear characteristics of thespeed ratio control valve, the speed ratio fuzzy controller based on the speed ratio feedback isdesigned. The experiment results show that the developed speed ratio control system is practical andfeasible.展开更多
The present paper deals with the modeling and control of Wind Energy Conversion System WECS based Doubly Fed Induction Generator DFIG using the slip energy recovery principle. The proposed drive system uses a Matrix C...The present paper deals with the modeling and control of Wind Energy Conversion System WECS based Doubly Fed Induction Generator DFIG using the slip energy recovery principle. The proposed drive system uses a Matrix Converter (MC) to transfer the slip energy of the rotor into the mains instead of using cascaded ac-dc-ac converter whilst the stator side is fixed to the grid. Operation at both sub-synchronous and super-synchronous regions is possible with the proposed drive system. The different level control strategies for maximum power point tracking and active-reactive power are discussed. Simulation results of the proposed doubly fed induction generator drive system show the good performance of the control system strategy for both transient and steadystate conditions.展开更多
针对风速随机性给风能转换系统(wind energy conversion system,WECS)带来的非线性和参数不确定性,提出了一种模糊自耦合PI控制方案用于低风速的最大功率点跟踪。自耦合PI被用来完成基本的转速跟踪,以实现对风力机尖速比的最优化控制。...针对风速随机性给风能转换系统(wind energy conversion system,WECS)带来的非线性和参数不确定性,提出了一种模糊自耦合PI控制方案用于低风速的最大功率点跟踪。自耦合PI被用来完成基本的转速跟踪,以实现对风力机尖速比的最优化控制。而模糊控制器则被用来获取自耦合PI在不同工作点下的控制参数,以提高系统对风速变化的适应能力。为了验证所提方案的可行性,在Matlab/Simulink搭建的2 MW风能转换系统仿真模型中开展了与传统方法的对比实验。仿真结果表明,相比于传统PI、模糊PI以及GA-PI,所提出方法拥有更佳的转速跟踪性能、更平滑的响应曲线以及更多的电能输出。展开更多
基金This project is supported by National Natural Science Foundation of China(No.50005026)Visiting Scholar Foundation of State Key Laboratory ofMechanical Transmission in Chongqing University, China.
文摘Based on the control scheme of force and position, the controlling andtesting system of metal V-belt type CVT is developed. Having taken account of the complex nonlinearcharacteristics of the CVT shift dynamics and the saturation and nonlinear characteristics of thespeed ratio control valve, the speed ratio fuzzy controller based on the speed ratio feedback isdesigned. The experiment results show that the developed speed ratio control system is practical andfeasible.
文摘The present paper deals with the modeling and control of Wind Energy Conversion System WECS based Doubly Fed Induction Generator DFIG using the slip energy recovery principle. The proposed drive system uses a Matrix Converter (MC) to transfer the slip energy of the rotor into the mains instead of using cascaded ac-dc-ac converter whilst the stator side is fixed to the grid. Operation at both sub-synchronous and super-synchronous regions is possible with the proposed drive system. The different level control strategies for maximum power point tracking and active-reactive power are discussed. Simulation results of the proposed doubly fed induction generator drive system show the good performance of the control system strategy for both transient and steadystate conditions.
文摘针对风速随机性给风能转换系统(wind energy conversion system,WECS)带来的非线性和参数不确定性,提出了一种模糊自耦合PI控制方案用于低风速的最大功率点跟踪。自耦合PI被用来完成基本的转速跟踪,以实现对风力机尖速比的最优化控制。而模糊控制器则被用来获取自耦合PI在不同工作点下的控制参数,以提高系统对风速变化的适应能力。为了验证所提方案的可行性,在Matlab/Simulink搭建的2 MW风能转换系统仿真模型中开展了与传统方法的对比实验。仿真结果表明,相比于传统PI、模糊PI以及GA-PI,所提出方法拥有更佳的转速跟踪性能、更平滑的响应曲线以及更多的电能输出。
