抄録
In the three phase system, the ripple components of the instantaneous active power and reactive power correspond to harmonic components of the current under the sinusoidal line voltage. So, the elimination of the harmonic current can be obtained by the ripple power reduction.
The control scheme of the proposed active filter is based on this principle. The ripple components of the instantaneous line power can be compensated by the three phase PWM converter. It is directly controlled by selecting a proper voltage vector not to flow any ripple power from the source line not by the direct control of the three phase current as the PWM switching technique.
The features of the active filter are simple construction, high accuracy, high efficiency and so on.
In this paper, we propose the new control scheme of the active filter, the principle of the PWM technique for the instantaneous power control and the construction of the system. After that, we will show some simulation and experimental results for the proposed system.
