A hybrid compensation system with an active filter and distributed passive filters in power systems with dispersed generation

This paper presents a hybrid compensation system consisting of an active filter and distributed passive filters. In the system, each individual passive filter connected to a distortion source is designed to eliminate main harmonics and supply reactive power for the distortion source, while the active filter is responsible for the correction of the system unbalance and the cancellation of the remaining harmonics. The studies are presented for a power system including dispersed generation units connected into systems through power electronic converters and diode rectifier loads, which generate distorted waveforms. The simulation results have demonstrated that good compensation effects can be achieved by using the combined filter system including distributed passive filters and an active filter.