直驱风力发电三相并网逆变电源研究

The Research on Three-phase Grid-connected Inverters for Direct-drive Wind Power Generation

以直驱风力发电的三相并网逆变电源为研究对象,针对传统的脉冲宽度调制方式谐波含量高、直流侧电压利用率低等不足,采用空间矢量脉宽调制(SVPWM)的算法控制。利用Matlab软件仿真系统,对该矢量控制方法进行分析。为了进一步验证控制理论的有效性,设计了基于高速数字化处理芯片TMS320F2812DSP的实验平台。实验结果表明该控制方案可行,系统并网效果良好,实现了单位功率因数并网,使电流能够很好的跟踪电网电压的变化。

The control and algorithm for the space vector pulse width modulation （SVPWM） was analyzed in the three-phase grid-connected inverters for direct-drive wind power generation. Compared width modulation, the SVPWM control has the advantages of high DC voltage utilization with the traditional pulse and low harmonic. Com- bined with Matlab software simulation system, the vector control method was analyzed. In order to verify the cor- rectness of the control theory, the experimental platform based on high-speed digital processing chip TMS320F2812DSP was designed. The experimental results show that the control scheme is feasible and the grid- connected current could have a good tracking of the voltage change, the system achieves unity power factor to the grid.