Decoupled Solid State Controller for Asynchronous Generator in Pico-hydro Power Generation

Abstract

This paper deals with a decoupled solid state controller (DSSC) for an isolated asynchronous generator (IAG), used in constant power pico-hydro power generation for feeding three-phase four-wire loads. The proposed DSSC is used to control the voltage and frequency of the IAG in the decoupled manner. This DSSC is a combination of a voltage regulator (VR) for regulating the voltage and a conventional electronic load controller (ELC) for controlling the active power to regulate the frequency. The VR is realized using a zigzag/three-single-phase transformer and six-leg insulated gate bipolar transistors (IGBTs)-based current controlled voltage source converter (VSC) with a capacitor on its DC bus and an ELC is a combination of a three-phase diode bridge rectifier with a chopper switch and an auxiliary load. The proposed DSSC with an isolated generating system is modeled and simulated in MATLAB along with Simulink and power system blockset (PSB) toolboxes. The simulated results of the IAG-DSSC system are presented to demonstrate its performance for feeding three-phase four-wire linear/nonlinear (balanced/unbalanced) loads with the neutral current compensation.

Keywords:

• Electronic load controller
• Decoupled solid state controller
• Isolated asynchronous generator
• Voltage regulator
• Voltage source converter

Additional information

Notes on contributors

Bhim Singh

Bhim Singh received the B.E. degree in Electrical Engineering from the University of Roorkee, Roorkee, India, in 1977, M.Tech, and Ph.D. degrees in Electrical Engineering from the Indian Institute of Technology (IIT)-Delhi, India, in 1979 and 1983, respectively.

In 1983, he joined the Department of Electrical Engineering, University of Roorkee, as a Lecturer, and in 1988, became a Reader. In December 1990, he joined the Department of Electrical Engineering, IIT-Delhi, as an Assistant Professor and became an Associate Professor in 1994 and a Professor in 1997. He has received Khosla Research Prize of University of Roorkee in the year 1991. He is recipient of JC Bose and Bimal K Bose awards of The Institution of Electronics and Telecommunication Engineers (IETE) for his contribution in the field of Power Electronics in the year 2000. He is also a recipient of Maharashtra State National Award of Indian Society for Technical Education (ISTE) in recognition of his outstanding research work in the area of Power Quality in the year 2006. He has received PES Delhi Chapter Outstanding Engineer Award for the year 2006. He has been the General Chair of the IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES’2006) held in New Delhi. His current research interests include power electronics, electrical machines and drives, active filters, flexible AC transmission system (FACTS), high-voltage DC (HVDC), and power quality.

Dr. Singh is a fellow of the Indian National Academy of Engineering (INAE), the National Academy of Science, India (NASI), the Institution of Engineers (India) (IE (I)), and the Institution of Electronics and Telecommunication Engineers (IETE). He is a Life Member of the Indian Society for Technical Education (ISTE), the System Society of India (SSI), and the National Institution of Quality and Reliability (NIQR), and a fellow of the Institute of Electrical and Electronics Engineers (IEEE). E-mail: [email protected]

V. Rajagopal

V. Rajagopal received the AMIE (Electrical) degree from The Institution of Engineers (India), in 1999 and the M.Tech degree from the Uttar Pradesh Technical University India, in 2004, His area of interest includes power electronics and drives, renewable energy generation and applications, FACTS, and power quality. He is currently working for Ph D degree at the Department of Electrical Engineering, Indian Institute of Technology (IIT) Delhi, India. He is a life member of the Indian Society for Technical Education (ISTE) and the Institution of Engineers (India). E-mail: [email protected]