Analysis and MPPT control of a wind-driven three-phase induction generator feeding single-phase utility grid

• Main Authors: Krishnan Arthishri, Natarajan Kumaresan, Nanjappagounder Ammasaigounden
• Format: Article
• Language: English
• Published: Wiley 2017-05-01
• Series: The Journal of Engineering
• Subjects: asynchronous generators; maximum power point trackers; wind turbines; power generation control; synchronisation; MPPT control; wind-driven three-phase induction generator; single-phase utility grid; three-phase diode bridge rectifier; single-phase voltage source inverter topology; wind energy; self-excited induction generator configuration; wind turbine system; maximum power point tracking; power converters; MPPT algorithm; grid current; proportional resonant controller; grid synchronisation; voltage source inverter; single-phase grid; Matlab-Simulink model; FPGA controller; modularised programming approach
• Online Access: http://digital-library.theiet.org/content/journals/10.1049/joe.2017.0091

In this study, a three-phase diode bridge rectifier and a single-phase voltage source inverter topology has been proposed for feeding single-phase utility grid employing a three-phase induction generator fed from wind energy. A self-excited induction generator configuration has been chosen for wide speed operation of wind turbine system, which gives the scope for extracting maximum power available in the wind. In addition to maximum power point tracking (MPPT), the generator can be loaded to its rated capacity for feeding single-phase utility grid using a three-phase induction machine, whereas it is not possible with existing configurations because of the absence of power converters. For the proposed system, MPPT algorithm has been devised by continuously monitoring the grid current and a proportional resonant controller has been employed for grid synchronisation of voltage source inverter with single-phase grid. A MATLAB/Simulink model of the proposed system has been developed to ascertain its successful working by predetermining the overall performance characteristics. The present proposal has also been tested with sag, swell and distortion in the grid voltage. The control strategy has been implemented using field programmable gate array (FPGA) controller with modularised programming approach. The efficacy of the system has been demonstrated with the results obtained from an experimental set-up in the laboratory.