T. Karthikeyan, Sijasimon, K. Kiruthika, K. Sathiyarai, INDUS College of Engineering, Coimbatore, Tamilnadu, India.
DOI : 01.0401/ijaict.2014.02.16
International Journal of Advanced Information and Communication Technology
Received On : January 15, 2015
Revised On : February 20, 2015
Accepted On : March 12, 2015
Published On : April 05, 2015
Volume 02, Issue 04
Pages : 259-261
Abstract
This paper presents the design of a high-performance sinusoidal pulse width modulation (SPWM) controller for three phase uninterruptible power supply (UPS) systems that are operating under highly nonlinear loads. The classical SPWM method is not good enough in compensating the harmonics and the distortion caused specifically by the nonlinear currents drawn by the rectifier loads. This study proposes a new design strategy that overcomes the limitations of the classical RMS control. It adds inner loops to the closed-loop control system effectively that enables successful reduction of harmonics and compensation of distortion at the outputs. The simulations are done in the MATLAB/SIMULINK environment using the Simulink and PLECS model of the inverter. The results are evaluated based on steady-state error, transient response, and the THD of the output voltage. A THD equal to 3.8% at the output voltage is achieved even under the worst nonlinear load.
Keywords
SPWM, UPS, MATLAB, Simulink.
Cite this article
T. Karthikeyan, Sijasimon, K. Kiruthika, “A High-Performance SPWM Controller for Three-Phase UPS Systems Operating Under Highly Nonlinear Loads ” INTERNATIONAL JOURNAL OF ADVANCED INFORMATION AND COMMUNICATION TECHNOLOGY, pp.259-261, April 05, 2015.
Copyright
© 2015 T. Karthikeyan, Sijasimon, K. Kiruthika. 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.