A Novel Regulation Band Approach for Fast Voltage Regulation in Single-Phase PFC Converters

Abstract

In this paper, a regulation band based digital voltage control scheme is proposed and key design and implementation fssues are discussed. In the proposed scheme, a hysteretic selector is designed to monitor the DC bus voltage in the voltage feedback path of the converter system. The selector algorithm decides switching between large bandwidth and narrow bandwidth voltage controller in the feedback path depending upon the value of the DC bus voltage to improve the voltage dynamics of the converter. This allows fast voltage response during transient conditions without compromising the quality of the input current during the steady state operation of the converter. The proposed scheme eliminates large overshoots and undershoots in the DC bus voltage during line and load disturbances, which are prevalent in conventional converter systems.

Indexing terms:

• Regulation band control
• Fast voltage regulation
• Power converter
• Power factor correction

Additional information

Notes on contributors

Ashish Pandey

Ashish Pandey received his MSc(Engg) degree in electrical engineering from Tashkent State Technical University, Tashkent CIS (ex. USSR) in 1997. He is currently working towards the PhD degree at the Indian Institute of Technology, New Delhi, India.

He is engaged in research on power-factor-corrected converters. His research interests include development of control strategies for fast output voltage regulation and sensor reduction in power converters.

D P Kothari

D P Kothari received his BE (Electrical), ME (Power Systems), and Doctoral degree in electrical engineering from the Birla Institute of Technology and Science, Pilani, India.

He is Professor, Center for Energy Studies and Deputy Director (Admn), Indian Institute of Technology, New Delhi, India. His activities include optimal hydro-thermal scheduling, unit commitment, maintenance scheduling, energy conservation (loss minimization and voltage control), power quality and energy systems planning and modeling. He has guided 21 PhD scholars and has contributed extensively in these areas as evidenced by the 464 research papers authored by him, which have been published in various national and international journals.

He has also authored 18 books on power systems. He was Visiting Professor at the Royal Melbourne Institute of Technology, Melbourne, Australia in 1982 and 1989. He was a national Science Foundation Fellow at Purdue University, West Lafayette, IN, USA in 1992. He has visited and delivered several invited talks and keynote addresses at both national and international conferences on the topic of electrical energy systems. He was Principal of Visvesvaryaya Regional Engineering College, Nagpur, India during 1997–1998.

Prof Kothari has received several best paper awards and gold medal for his work.

Bhim Singh

Bhim Singh was born in Rahmapur, India in 1956. He received his BE(Electrical) degree from the University of Roorkee, India in 1977, and 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. In 1988, he became a Reader. In December 1990, he joined Department of Electrical Engineering, IIT, New Delhi, India as an Assistant Professor. He became an Associate Professor in 1994 and a full Professor in 1997. His fields of interests include power electronics, electrical machines and drives, active filters, static var compensators and analysis and digital control of electrical machines.

Prof Singh is a Fellow of the INAE, IE(I) and IETE and a Life Member of ISTE, SSI and NIQR and Senior Member of IEEE.