级联式双反馈风力发电系统建模仿真

Modeling and simulation on cascade type doubly-fed induction generation system

提出了一种新型的变速恒频级联式双反馈发电系统。该系统省略了PWM变换器及直流电容,不需要进行频率控制,与常规的双反馈风力发电系统相比,原理简单,控制方便。文章分析了系统变速恒频发电原理,通过对双馈电机的分析建立了该系统稳态运行时的电路模型,并进行了理论分析。在此基础上,利用SIMULINK分别对空载和负载稳态运行进行了仿真。通过对仿真结果分析,给出了该系统发电运行的条件。该系统空载运行时的并网比变速恒频双反馈发电系统空载并网更容易实现。

Proposed one kind of new variable speed constant frequency cascade type doubly-fed wind power generation system. The system has eliminated the PWM converter and the direct-current electric capacity, and is not necessary to carry on the frequency control, is simpler than the conventional double feedback wind power generation system in principle, the control is also convenient. The article analyzed the principle of variable speed constant frequency power generation system, set up the stable state operation electricocircuit model through the analysis on double feedback motor and carried out theoretical analysis on the model. Based on the analysis, simulation on the operation respectively at the idle state and the load state has been carried out by using SIMULINK. After analyzing the simulation results, the requirement for power generation has been proposed. The grid connection operation of this system at idle state is more easy to be realized than that of variable speed constant frequency doubly-fed system.