【摘要】 为研究双馈风电机组DFIG最大功率跟踪MPPT动态特性,在Matlab/Simulink仿真平台上建立了功率信号反馈算法的风机MPPT控制模型。以矩形风速为例,理论推导了MPPT静态工作点的过度时间和风机输出能量的计算公式,通过仿真和理论分析了不同转子惯性对风电机组动态功率、转速、叶尖速比、风能利用效率的影响,结合转子动能阐述了双馈风电机组MPPT动态功率特性,指出风机惯性时间常数越大风能利用系数越低。最后比较了几种不同风速下的风机MPPT动态特性,结果表明,随机风的风机转速跟踪能力最差,阵风和渐进风的风机转速跟踪效果较好。更多还原

【Abstract】 In order to study the dynamic characteristics of the maximum power point tracking(MPPT) of the doubly fed induction generator(DFIG), the MPPT control model of the power signal feedback algorithm is established on the Matlab/Simulink simulation platform. Taking the rectangular wind speed as an example, the transition time of MPPT static operating points and output energy of wind turbine are deduced by theory. The influence of different inertia of turbine on the dynamic power, speed, tip speed ratio and wind energy efficiency of wind turbine is analyzed by simulation and theory. The dynamic power characteristic of MPPT of doubly fed wind turbine is described with the kinetic energy of rotor. Characteristics. It indicate that the greater inertia time constant, the lower the wind energy utilization factor. Finally, the dynamic characteristics of MPPT under different wind speeds are compared. Rotating speed tracking ability under random wind is worst, rotating speed tracking ability under rust and progressive wind is better.更多还原