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Indeed, the stator is directly connected to the grid while the rotor is connected to it via two bidirectional static inverters cascaded through a continuous bus . Figure 1. Configuration of studied system. Comparative Study between Classical PI … 41 The aim of this work is to compare two command techniques: the classical PI and the Sliding Mode Controller (SMC). Our study is based on the performance analysis in terms of tracking, stability face to the disturbances and robustness. Indeed, our controller is used for the vectorial command of the DFIG, the control of the continuous bus and the control of the grid converter.
63) Comparative Study between Classical PI … 51 In closed loop, the transfer function is expressed as follows: . FTBF = . (64) To determine the regulation of PI parameters, K and K , our study consists in identifying the FTBF denominator with the following polynomial characteristics [13, 14]: P=1+ s+ s (65) With: ζ: Damping coefficient (without unit) W0: Pulsation of the unamortized oscillations We Obtained: K = 2. ξ. b. W − K = b. ω = 3 The wind turbine has three regulation blocks. The first corresponds to current regulation Ird and Irq.
Chapter 2 COMPARATIVE STUDY BETWEEN CLASSICAL PI AND SLIDING MODE CONTROLLER FOR A GRID CONNECTED WIND TURBINE BASED ON DFIG Walid Ouled Amor* and Moez Ghariani Department of Electrical Engineering, National School of Engineering of Sfax, Laboratory of electronics and information technology, University of Sfax, Sfax, Tunisia ABSTRACT The aim of this work is to make a comparative study of the dynamic behavior of an aero-generator with a double fed induction generator (DFIG) connected to the grid through two controller techniques: SMC and PI Controller.