基于LVPWM的风电变流器控制技术研究

Control Strategy of the Converter of Wind Generator Based on LVPWM

变流器是双馈发电机系统的关键部分,它决定着控制系统及发电机输出电能的质量。针对以前的变流器广泛采用空间矢量脉宽调制(SVPWM)控制技术的不足,提出了逻辑电压空间矢量脉宽调制(LVPWM)控制技术,并介绍了其原理。最后搭建了Matlab/Simulink仿真试验平台和基于TMS320F2812 DSP的47 kW变流器实验平台,实验结果表明,LVPWM控制技术正确且实用,并具有良好的应用前景。

Converter is the key part of doubly-fed induction generator system,which determines the control system and generator output power performance.The previous converters widely use space vector pulse width modulation（SVPWM）control technology,the article proposes logic voltage space vector pulse width modulation（LVPWM） control technology and describes its principles.In Matlab/Simulink simulation platform,a simulation model is validated.At the same time,TMS320F2812 DSP of 47 kW converter experimental platform is established.The experimental results show that LVP-WM control technology is correct and practical,and has good prospects.