公开(公告)号：US5567994A

公开(公告)日：1996-10-22

申请号：US536894

申请日：1995-09-29

申请人： Gerald W. Davis ,  Shiping Huang ,  Peter J. Unsworth

发明人： Gerald W. Davis ,  Shiping Huang ,  Peter J. Unsworth

IPC分类号： H02J3/01 ,  H02M1/12

CPC分类号： H02J3/1842 ,  Y02E40/22

摘要： A hybrid active filter shunts three-phase power with passive elements tuned to have low impedance at a frequency of harmonic distortion. The passive elements are in series with controlled voltages sources providing cancelling currents to the harmonic currents. Rapid determination of the harmonic currents is provided in real-time through the use of a Park transformation reducing the variables which need to be manipulated. Measured currents as transformed are used to model undistorted current based on an average power consumed by the load. When the undistorted current is subtracted from the actual current, a harmonic current signal is produced that may be used to drive the voltage sources. The time domain method requires rapidly computed running averages and thus may be performed in-between the acquisition of the measured current samples.

摘要翻译： 混合有源滤波器将三相功率与被调谐为在谐波失真频率处具有低阻抗的无源元件分流。 无源元件与控制电压源串联，提供对谐波电流的消除电流。 谐波电流的快速确定通过使用Park变换来实时提供，减少需要操纵的变量。 转换后的测量电流用于根据负载消耗的平均功耗对未失真电流进行建模。 当从实际电流中减去不失真的电流时，产生可用于驱动电压源的谐波电流信号。 时域方法需要快速计算的运行平均值，因此可以在获取测量的当前样本之间进行。