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Shunt Active Power Filter with Selective Harmonics Compensation for LVdistribution grid

pubblicazioni - Memoria

Shunt Active Power Filter with Selective Harmonics Compensation for LVdistribution grid

Nell’articolo viene presentato un modello di filtro attivo connesso in parallelo alla rete di distribuzione di bassa tensionea quattro fili per il miglioramento della Power Quality. Tale dispositivo è controllato in modo da operare unacompensazione selettiva delle armoniche e con una strategia di modulazione a banda d’isteresi predittiva a frequenzafissa.

A Shunt Active Power Filter (SAPF) employable in a Low Voltage distribution grid four-wires model ispresented. The use of this device helps to improve Power Quality compensating harmonic currents, reactivepower and current unbalances of a disturbing loads. Each compensating function can be activated or disabledaccording to the specific requirements of the application. A selective harmonic compensation is alsopossible, in order to avoid possible resonances at specific frequencies.

A current hysteresis modulation withpredictive calculation of threshold bands achieving fixed switching frequency is adopted for a fast dynamicresponse. The compensation performance of the proposed active power filter and the associate controlscheme under steady state and transient conditions is demonstrated through digital simulations.

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