FPGA-based closed-loop monitoring and control of doubly fed induction generator with single inverter and battery for wind energy conversion

ABSTRACT

A simplified system has been designed for the operation of stand-alone doubly fed induction generator (DFIG) employing a single inverter control scheme for wind energy electric conversion system to supply isolated loads. By varying the rotor input voltage and frequency of the DFIG, the magnitude and frequency of the voltage at stator terminals can be maintained constant over a wide range of speed. The excitation of rotor is established using a single inverter of sinusoidal pulse width modulation (SPWM) type connected at the rotor terminals which is achieved by varying the modulation index (MI) and modulating frequency (MF) of the SPWM pulses given to the inverter. Altium Nanoboard, which inherently has XILINX SPARTAN 3AN FPGA on it, has been employed for generation of such variable MI and MF SPWM pulses and also to update the parameters in the display through its embedded interface. The dynamic and steady-state results show that the controller maintains constant voltage and frequency at the stator terminal during change in speed or load.

KEYWORDS:

• Doubly fed induction generator (DFIG)
• wind energy electric conversion system (WEECS)
• sinusoidal pulse width modulation (SPWM)
• Field programmable gate array (FPGA)

Additional information

Notes on contributors

K. A. Nikhil

K. A. Nikhil completed his M.Tech. in  Power Electronics  at National Institute of Technology, Tiruchirappalli in the year 2016.

P. Bharath Chandra

P. Bharath Chandra was a B.Tech student of National Institute of Technology, Tiruchirappalli during 2013-17 and presently associated with Indian Oil Corporation Limited.

M. R. Jawahar

M. R. Jawahar has completed his B.Tech. in EEE at National Institute of Technology, Tiruchirappalli in the year 2017. He is presently working with Qualcomm Inc.

S. Moorthi

S. Moorthi and M. P. Selvan are working as Associate Professor in the department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirappalli and associated with Hybrid Electrical Systems laboratory.

N. Kumaresan

N. Kumaresan is Professor in the  department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirappalli and associated with Hybrid Electrical Systems laboratory.