11-09-2017, 12:13 PM
The current control strategy is the same as that used in the pulse pre-regulator, which is the medium current mode technique. The work focuses on the design methodology and analysis of the control strategy that allows harmonic compensation and phase shift of the input current, for single and multiple linear and nonlinear loads. Results of the simulation of an active filter controlling a single charge, consisting of a 1600 W rectifier with a capacitive filter, and a multiple load, consisting of an 800 W rectifier with a capacitive filter and an AC chopper of 800 W. We present the experimental results of an active filter that controls a 400 W rectifier with a capacitive filter, an 800 W AC chopper and a 580 W multiple load consisting of a rectifier with a capacitive filter and an AC chopper .
The use of the active power filter (APF) is an efficient solution for all these problems. APFs can be connected to the circuit in series or in parallel. The APF series is normally used to eliminate voltage harmonics, peaks, sags, notches, etc. while the parallel APF is used to eliminate current harmonics and reactive power components. The converter used in APF may be an inductive energy storage current source (CSI) inverter or a capacitive storage voltage source inverter (VSI). The APF behaves as a non-sinusoidal current source to cancel current harmonics generated by the non-linear load. Power factor compensation and energy redistribution to keep the system balanced are some of the other advantages of APF.
The use of the active power filter (APF) is an efficient solution for all these problems. APFs can be connected to the circuit in series or in parallel. The APF series is normally used to eliminate voltage harmonics, peaks, sags, notches, etc. while the parallel APF is used to eliminate current harmonics and reactive power components. The converter used in APF may be an inductive energy storage current source (CSI) inverter or a capacitive storage voltage source inverter (VSI). The APF behaves as a non-sinusoidal current source to cancel current harmonics generated by the non-linear load. Power factor compensation and energy redistribution to keep the system balanced are some of the other advantages of APF.