Implementation of Synchronous Reference Frame Theory Based Shunt Active Power Filter Using DSP Controller

Full text: This paper conceptualizes shunt active power filter (SAPF) using synchronous-reference frame (SRF) theory to mitigate the harmonics present in the power system. The shunt active power filter injects a suitable compensating current at a point called the "point of common coupling" (PCC) so that the harmonics present in the line are cancelled out and the sinusoidal nature of the current waveforms is restored. A three-phase current controlled voltage source inverter (VSI) with DC link capacitor across it is used as an active filter. The synchronous reference frame (SRF) algorithm is developed for low voltage laboratory prototype using a TMS320F28335 digital signal processor (Texas instruments "Delfino"). The experimental test results demonstrate that the viability of the control strategy is successful in meeting the IEEE 519-1992 recommended harmonic standard limits. (author)