Design of Shunt Active Filters based on Phase Locked Loop and PI Controller
R. Balaji1, B.Mohamed Faizal2
1R.Balaji, EEE, Dr. S.J.S Pauls Memorial College of Engineering and Technology, Puducherry, India.
2B.Mohamed Faizal, EEE, Dr. S.J.S Pauls Memorial College of Engineering and Technology, Puducherry, India.
Manuscript received on June 25, 2014. | Revised Manuscript received on July 03, 2014. | Manuscript published on July 05, 2014. | PP: 60-63 | Volume-4, Issue-3, July 2014. | Retrieval Number: C2292074314/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper presents a active filter topology and its control technique. Active power filter topology is the most efficient way to compensate reactive power and lower order harmonics generated by non linear loads. The shunt active power filter was consider to be the most basic configuration for the APF. Different techniques have been applied to obtain a control signal for the active filters. One technique is Phase Locked Loop controller combined with PI controller, where the current waveform injected by the active filter is able to compensate the reactive power and load current harmonics. Here the simulation has been carried out through the MATLAB SimPowerSystems Toolbox and the results are tabulated. With the proposed control strategy the total harmonic distortion is reduced to a great level and hence the power factor is also improved there by towards power quality enhancement.
Keywords: Active power filters, harmonics, Power quality, Phase Locked Loop.