CURRENT HARMONIC COMPENSATION IN THE ELECTRICAL NETWORK USING VOLTAGE SHUNT ACTIVE FILTER CONTROLLED BY HYSTERISIS

Abstract

This paper presents a study on voltage active filter, controlled by hysterisis and placed in parallel on an electrical network polluted by a three-phase rectifier. Firstly, we gave the power circuit of the active filter and his control strategy. In a second time, we developed the method of instantaneous active and reactive powers for identifying the reference currents of the filter. We then provided the results of the simulation for a polluting load of 400KVA. These results show a good compensation of current harmonics and a good reduction of total harmonic distortion (from 29% before filtering to 4% after filtering). Also, these results clearly reflect the effectiveness of our active filter to meet IEEE-S19 recommendations on harmonic levels. Finally, to see the effects on compensation of harmonics, we conducted a study of total harmonic distortion depending on certain parameters of the system "electrical network - active filter - polluting load".