American Journal of Applied Sciences

Power Quality Improvement Using a Sliding Mode Control of a Series Active Filter

Theerayuth Chatchanayuenyong

DOI : 10.3844/ajassp.2008.1029.1033

American Journal of Applied Sciences

Volume 5, Issue 8

Pages 1029-1033


A sliding mode controller (SMC) for a three-phase series active filter was proposed to compensate voltage unbalances, suppress voltage sags and swells and hence improve the power quality of a three-phase ac system. The voltage unbalance compensation and regulation is only based on the positive sequence component decomposition of the supply voltage that is then adjusted to a rated value and used as the reference voltage for the sliding mode controller. This study also includes compensation algorithm, design equations and circuit design criteria. Simulation results ensure the concept and validity of the proposed control system.


© 2008 Theerayuth Chatchanayuenyong. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.