The problem of harmonic pollution in distribution electrical networks is becoming more and more worrying with the increasing use of nonlinear loads. This work presents a study and hardware realization of three shunt active filter and the different methods used in their command. The command of three active filter based in two axis: the one harmonic current identification and the other is the control of the current how inject by the active filter in the networks, there are several method to identified harmonic current, instantaneous power and modified instantaneous power, Synchronous reference frame and method based for self tuning filter.
In this paper, topologies and control schemes are proposed for three-level three-phase active power filters. The paper presents the principles of operation and design criteria for both the power and control circuits. Finally, a detailed comparison is established with two types of current controllers are considered: hysteresis and PWM for the quality of the energy supplied relative to the imposed standards is validated with computer simulation using MATLAB. The obtained results showed that source current is sinusoidal and in phase with source voltage. The proposed solution has achieved a low total harmonic distortion demonstrating the effectiveness of the presented method.
three-level inverter, Shunt active power filter, instantaneous power, harmonic distortion, control hysteresis, PWM control
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