一种新型直驱式风力发电系统控制策略

摘要

对双PWM变换器的永磁直驱风力发电系统，建立了机侧变流器控制直流母线电压稳定、网侧变流器控制跟踪最大功率的控制系统。在此系统中提出了一种单位功率因数的机侧变流器控制策略，减小了系统的运行容量。在 MATLAB/Simulink 中搭建了系统的仿真模型，仿真结果表明该控制系统能实现发电机的单位功率因数运行和最大功率跟踪。%A control system for direct drive wind generation system with the dual pulse-width modulation( PWM) converter was established. In this control scheme, the generator-side converter was used to maintain a stable DC-link voltage, while the grid-side converter realized the maximum power point tracking(MPPT). In this system, a unity power factor control strategy was described. The operation capacity of this system could be reduced. Simulation results showed that the control strategy can achieve unity power factor and maximum power point tracking.