Direct Control for Active Power in three-phase application on perturbed network
Résumé
There are today many techniques for controlling active filters on three-phase networks in order to correct the power factor and limit the harmonics consumed at the source. Almost all of these methods are designed for a perfect sinusoidal source and don't perform sinusoidal current when voltages are perturbed. The work developed here concerns the active filtering on a perturbed network, that is to say the presence of voltage harmonics at the connection point in addition to an unbalanced voltages system. A proposed method is described and their results are compared to those obtained by the p-q theory, modified p-q theory and p-q-r method for an application on a three wire power distribution network under perturbed voltage and non-linear load. The assessment concerns the system of currents in the source side after filtering and a comparative evaluation for unbalance factor and for all methods.
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