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Power Quality Improvement using Fuzzy Based AC-DC Cuk Converter
A single stage single switch AC/DC converter is an integration of input current shaper and a DC/DC cell with a shared controller and one active switch. The converter is applicable for digital input power supply with high input power factor and tight output voltage regulation. The Improved Power Quality AC-DC Converters (IPQCs) provides enhanced power quality in terms of improved power factor and reduced Total Harmonic Distortion (THD) at the utility interface. This paper addresses comparison of power factor correction techniques for high frequency isolation based single phase PI and fuzzy logic controlled based Buck-Boost AC-DC Cuk Converter, which consists of only one switch resulting in reduced THD and improved power factor. With an awareness of modern design trends towards improved performance, the proposed converter is designed for low power rating and low output voltage. To validate the design of the converter at the primary stage, simulation is performed at lower as well as at higher loads.
Keywords
AC-DC Converters, Power Quality, THD, Power Factor Correction, Control Techniques, Fuzzy Logic Controller (FLC)
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