基于基波磁通补偿的三相有源电力滤波器

电力系统中的谐波源大多为三相结构。根据基波磁通补偿的滤波新原理研制了一套三相有源电力滤波装置，该装置采用3个独立的串联变压器和3套独立的逆变器，以便应用于实际中可能出现不对称的三相负载。通过MATLAB仿真确定了串联变压器和无源滤波器参数，根据自动控制原理和滞环电流控制的特点推导了控制器参数的选择原则，研究了有源电力滤波器投入和切除时的过渡过程。现场运行结果证明了该装置极好的德波特性及平稳的过渡过程。

THREE-PHASE ACTIVE POWER FILTER BASED ON FUNDAMENTAL MAGNETIC FLUX COMPENSATION

A practical 3 phase series active power filtering device is investigated based on the principle of the fundamental magnetic flux compensation. Considering the imbalance of the practical three phase load, the device consists of three individual series transformers and three individual inverters. The parameters of series transformer and passive filter are chosen by use of MATLAB simulation results. The controller parameters are presented according to the principle of nonlinear control and the characteristic of hysteresis current control. The transient process is investigated when the active power filter is turned on or off. A set of automatic 3 phase active power filter industrial device is made and operated in the field. The operating results show its excellent filtering characteristic and steady transient process.