International Journal of Power Electronics and Drive System (IJPEDS) Vol. 8, No. 3, September 2017, pp. 1240~1250 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v8i3.pp1240-1250  1240 Journal homepage: http://iaesjournal.com/online/index.php/IJPEDS Investigation of Power Quality Improvement in Super Lift Luo Converter J. Gnanavadivel 1 , N. Senthil Kumar 2 , C.N. Naga Priya 3 , K.S. Krishna Veni 4 1,2,4 Department of Electrical and Electronics Engineering, Mepco Schlenk Engineering College, Sivakasi, India 3 Department of Electrical and Electronics Engineering, Sri Vidhya College of Engineering & Technology, India Article Info ABSTRACT Article history: Received May 20, 2017 Revised Jul 25, 2017 Accepted Aug 3, 2017 This paper presents the improved single phase AC-DC super lift Luo converter for enhancing quality of power by mitigating the issues. The proposed converter is used for output voltage control, power factor improvement and reduced source current harmonics at supply side. The main intention of this work is to design appropriate closed loop controllers for this AC-DC super lift Luo converter to achieve unity power factor in the source end. The designed control system comprises of two control loops, voltage control in outer loop and the current controller is devised in the inner loop. Fuzzy controller is used for current controller whereas PI controller as voltage controller. In the MATLAB/SIMULINK platform, simulation of the proposed AC-DC super lift Luo converter is done. It is clear from the simulation results that PI integrated fuzzy controller for voltage and control is proven to be better than classical PI with hysteresis controllers. The proposed system is able to achieve high input power factor along with supply current harmonic distortions of less than 5%. Keyword: AC-DC super lift Luo converter Fuzzy HCC Power Factor Total Harmonic Distortion Copyright ©2017 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: J. Gnanavadivel, Department of Electrical and Electronics Engineering, Mepco Schlenk Engineering College, Mepco Nagar, Sivakasi – 626 005, Tamilnadu, India. Email: gvadivel@mepcoeng.ac.in 1. INTRODUCTION The AC-DC power converter grabs the attention, since it meets the commercial requirements in precise manner. But with deviation in the source parameters by the use of power converters may results in potential power quality problems. Among various power quality issues the harmonic distortions are considered to be one of the most important reasons for the power quality problems. On account of reducing the price of the AC to DC conversion system, diode bridge rectifier along with a capacitor is commonly employed in classic methods. But the main drawbacks of the conventional systems are low power factor, high harmonic distortions, voltage distortion and low efficiency [1]-[3]. To prevail over these shortcomings, single phase rectifier with boost topology is adopted. In comparison to bridge rectifiers, the boost topology offers reduced supply current harmonics, improved input power factor and reduced filter requirements [4]. Even though, it offers lot of advantages it has its own drawback of high switching loss thereby efficiency gets lowered. To overcome these drawbacks, buck-boost converters, SEPIC, CUK converters are used along with the AC-DC rectifier [5]-[8]. Bridgeless topology was introduced in conventional topologies instead of rectifier circuitry to reduce the conduction losses [9]-[11] and a single stage dual-purpose inverter was proposed to improve control reliability and to improve power factor [12]. Though, these topologies operates with minimized conduction losses, there occurs switching losses due to increased number of components. And also the voltage transfer gain is low and ripple content in output voltage is high. So the single phase AC- DC super lift Luo converter is proposed here. Due to the inherent response, super lift Luo converter is most