WSEAS Transactions on Systems
Print ISSN: 1109-2777, E-ISSN: 2224-2678
Volume 11, 2012
The Effect of Harmonic Detection Speed on the Overall Performance of Shunt Active Power Filters
Authors: , ,
Abstract: Active Power Filters (APFs) are the up-to-date solution to power quality problems. Shunt active filters (the most common type) allow the compensation of current harmonics, unbalance, together with power factor correction, and can be much better solution than the conventional approach. Harmonic reference detection is the key word for the proper operation of APF. This paper studies the effect of the speed and the complexity of the detection algorithm on the overall performance of the shunt APF. An experimental shunt APF is built and controlled using a Digital Signal Processor (DSP). Three different detection algorithms are analyzed and tested. These algorithms are the Instantaneous Reactive Power Theory (IRPT) or simply the p-q theory, Synchronous Reference Frame (SRF), and Synchronous Detection Method (SDM). The three different extraction techniques result finally in a graded performance of the shunt APF which lead to different results for the supply current THD% and supply power factor.