Output feedback control of wind energy conversion system involving a doubly fed induction generator. Issue 4 (5th May 2019)

• Record Type: Journal Article
• Authors: Lajouad, Rachid; Giri, Fouad; Chaoui, Fatima Zahra; El Fadili, Abderrahime; El Magri, Abdelmounime
• Is Part Of: Asian journal of control. Volume 21:Issue 4(2019)
• Page Start: 2027
• Page End: 2037
• Publication Date: 2019-05-05
• Subjects: DFIG -- high gain observer -- nonlinear control -- output feedback control -- sensorless control -- wind energy; Automatic control -- Periodicals; Control theory -- Periodicals; 629.805
• DOI: 10.1002/asjc.2116
• Languages: English
• ISSNs: 1561-8625

Abstract

Abstract: This paper deals with the problem of controlling a wind energy conversion system (WECS) based on the doubly fed induction generator (DFIG), by IGBT‐based back‐to‐back rectifier‐inverter. The goal of control is to maximize wind energy extraction letting the wind turbine rotor operate in a variable‐speed mode. Interestingly, the present study features the achievement of the above energetic goal without resorting to sensors for wind velocity. The control strategy involves: (i) an output feedback non‐linear regulator designed by the backstepping technique and based on the use of a high gain observer; (ii) a sensorless online reference‐speed optimizer designed using the turbine power characteristic to achieve the maximum power point tracking (MPPT) requirement. It is formally shown that the proposed controller actually meets its control objectives. This theoretical result is confirmed by several simulations.