Desain Filter Aktif dengan Skema Fuzzy Logic Controller untuk Mereduksi Harmonisa

Abstract

Harmonics are known as one of the causes of decline in the quality of the electrical power system, whichcan cause a negative impact on electronic equipment. Harmonics reduction that has been achieved with the passivefilters is not quite satisfactory, thus development of active filters is required. This research proposes the use of parallelactive filter design using a three-level inverter with the scheme of Fuzzy Logic Controller (FLC) that is used to reduceharmonics. The use of three stages Multilevel Inverter (MLI) on parallel active filter has several advantages that arelowering harmonic distortion and reducing stress switching. From the simulation results, it was obtained that threeparallel active filters were capable of reducing the level of harmonic currents and voltages at the source; THDi beforeinstallation of the filter was equal to 26,16% and can be lowered to 2,42%. While THDv was reduced from 0,45%to 0,17%. Fifth-order harmonics is the most disturbing harmonic component, in which the value of IHDi beforeinstalling the filter is equal to 21,44% and reduce to 1,2% after the installation of the active filter.

Keywords

• MLI, FLC, THDi, THDv