摘要
基于瞬时无功功率理论,提出了一种利用d-q坐标变换对系统中任意指定次谐波进行精确检测的方法。该方法应用于三相电路中,不受电压和负荷电流不对称情况的影响而得出任意次谐波电流补偿指令。进一步利用基于电压空间矢量脉冲宽度调制(SVPWM)理论的APF补偿电流控制策略验证该检测方法的正确性。在数字信号处理器(DSP)上低通滤波器予以实现,分析了DSP的延时影响并给出了解决方法。理论分析、仿真结果表明所提出的计算和控制方法的有效性,从而为DSP控制有源滤波器的实际应用提供了一定的借鉴意义。
An accurate algorithm for random specified harmonic current using d-q coordinate transformation base on instantaneous reactive power theory was presented. It is not influenced by voltage and unbalanced load current to get random harmonic current signal when the method is applied to three phase circuit. Further, use the APF control method of compensation current base on the principles of the space-vector pulse width modulation （SVPWM） to prove the detecting method is exactness. Low filter on digital signal processor was implemented, the influences of delay on DSP was analyzed and the solving methods was offered. Theoretical analysis, simulation results demonstrate the effectiveness of the proposed calculation and control approaches, which provide some references for DSP control the APF can be applied to practice.
出处
《电气传动》
北大核心
2008年第11期77-80,共4页
Electric Drive
关键词
谐波
有源滤波器
d—q坐标变换
空间矢量脉冲宽度调制
harmonic
active power filter （APF）
d - q coordinate transformation
space vector pulse width modulation （SVPWM）
