【摘要】 针对变速恒频风电机组变换器功率日益增长的现状,提出了一种新型控制技术——交错采样变矢量(SSTV)控制技术。该技术基于双并联变换器的平均值等效模型,它在不需要增加任何硬件成本的基础上,可以提高双并联变换器的等效输出开关频率,降低输出电流谐波;同时,在双并联变换器的交流侧和直流侧都直接相连的条件下,可以有效抑制零序电流。该文对交错采样变矢量控制技术的原理和实现方式都进行了详细地阐述。仿真和计算结果表明,该方案将双并联变换器的等效输出开关频率提高了1倍,同时将零序电流的峰值减少了80%以上。此外,该技术还具有鲁棒性强,易于工程实现等优点。更多还原

【Abstract】 A new control technology-staggered sample transforming vector(SSTV)control technology-has been proposed for the continuous development of the converter’s power in the variable speed constant frequency wind turbine.Based on the average model of dual parallel converter,this control technology can increase the equivalent output switching frequency of dual parallel converter and decrease the output current harmonic without any additional hardware;further more,it can restrain the zero sequence current effectively when the ac-sides an dc-sides of dual parallel converter are connected directly. The principle and implement scheme of SSTV has been discussed in detail in the paper.The results of simulation and compute demonstrate that it can double the equivalent output switching frequency of dual parallel converter and decrease more than 80%of the peak value of zero sequence current.Besides,the technology is robust and easy to implement in the project.更多还原