Control and Performance of Shunt Current Source Active Power Filter with Series Capacitor

Abstract

This paper presents in detail the operational principle, theory, control and experimental results of a shunt current source active filter with series capacitor. With the proposed topology the voltage stresses and power losses of the conventional current source active power filter (CSAF) can be reduced. The proposed topology is based on the series capacitor structure used to block the fundamental supply voltage component. Moreover, computational capacitor voltage balancing is studied to compensate the effects of the asymmetry. The control system is realized using a Motorola MPC563 microcontroller. The results show that the voltage stresses of the power switches are low and the efficiency of the overall system is high.