Sliding Mode Control of PFC Converter

Abstract

The controllers in Power Factor Corrected (PFC) converters are conventionally designed in frequency or time domain using linearized model of the converter system. These controllers are not always adequate for PFC converters due to presence of hard nonlinearity in the system. Theoretically, linear feedback designs can only ensure stability and satisfactory operation under restrictive operating conditions for which the linearized model is valid. However, as the application base of PFC converters increases, the need for more robust control schemes becomes imperative. To this end, the sliding mode approach, described in this work, inherently addresses hard nonlinearity present in the PFC converters. The controller design and simulations results are presented and discussed in detail. As expected, the results show that sliding mode controller improves converter dynamics and large-signal stability without compromising on the intrinsic simplicity of the conventional control scheme. The sliding mode controller is found to be more robust and appropriate control scheme for PFC converters as compared to conventional linear controllers.

Indexing terms:

• Sliding mode control
• Power-factor correction
• AC-DC converter
• Power quality

Additional information

Notes on contributors

Ashish Pandey

Ashish Pandey is an Assistant Professor at in Department of Electrical and Electronics Engineering MAIT-New Delhi. Earlier (2004–2005) he was Assistant Professor in Indian Institute of Information Technology-Allahabad, India. He has an MSc (Engineering) and PhD in Electrical Engineering from Tashkent State Technical University and the Indian Institute of Technology—Delhi, respectively. His research interests are power quality, power electronics and embedded systems.

D P Kothari

D P Kothari is Director Incharge at IIT Delhi and Professor, Center for Energy Studies, Indian Institute of Technology, Delhi. He has been Head of Center for Energy Studies (1995–1997) and Principal (1997–1998) of Visvesvaraya Regional Engineering College, Nagpur. Earlier (1982–1983 and 1989), he was a Visiting Fellow at RMIT, Melbourne, Australia. He obtained his BE ME and PhD degrees from BITS, Pilani. Afellow of the Institution of Engineers (India), he has published/presented 500 papers in national and international journals/conferences. He has authored/co-authored more than 18 books, including power system engineering, modern power system analysis, electric machines, power system transients and theory and problems of electrical machines. His research interests include power system control, optimization, reliability and energy conservation.

Bhim Singh

Bhim Singh was born in Rahamapur, India, in 1956. He received the BE. (Electrical) degree from the University of Roorkee, Roorkee, India, in 1977 and the MTech and PhD degrees from the Indian Institute of Technology (IIT), New Delhi, India, in 1979 and 1983, respectively. In 1983, he joined the Department of Electrical Engineering, University of Roorkee, as a Lecturer. He became a Reader there in 1988. In December 1990, he joined the Department of Electrical Engineering, IIT, New Delhi, India, as an Assistant Professor. He became an Associate Professor in 1994 and a Professor in 1997. He is recipient of JC Bose and BK Bose awards of IETE. His fields of interest include power electronics, electrical machines and drives, active filters, static V AR compensators, analysis and digital control of electrical machines. Prof Singh is a Fellow of the Indian National Academy of Engineering (INAE), Institution of Engineers (India) (IE(I)), and Institution of Electronics and Telecommunication Engineers (IETE) and a Life Member of the Indian Society for Technical Education (ISTE), System Society of India (SSI), and National Institution of Quality and Reliability (NIQR).