Comparative Study between SPWM and SVPWM control of a three level voltage inverter dedicated to a variable speed wind turbine

Belkacem Belkacem, Lahouari Abdelhakem-Koridak, Mostefa Rahli

Abstract


In this paper, a power production system containing a variable speed wind turbine equipped with a Doubly Fed Induction
Generator (DFIG) is presented, the DFIG stator is connected directly to the grid, and the rotor is connected by a three level
three phase inverter with a Neutral Point Clamping structure (NPC). This last must be then dimensioned to forward only the
available power of the rotor. In this work, a comparative study of two command strategies of the inverter is detailed, by
separate order control: Firstly Sinus Pulse Width Modulation (SPWM) and secondly Sinus Vectorial Pulse Width Modulation
(SVPWM). All the simulation models are built in MA TLAB/Simulink software and the performance of the control system is
evaluated through FFT analysis of results.


Keywords


DFIG, SPWM, SVPWM, FFT, THD analysis, Three levels inverter

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