Mémoires de Fin d’Etudes
Etablissement
Université de Sidi Bel Abbès - Djillali Liabes
Affiliation
Département Electrotechnique
Auteur
BOUZIDI, Mansour
Directeur de thèse
Benaissa Abdekader (Maitre de conférence)
Filière
Electronique de puissance
Diplôme
Doctorat
Titre
Nonlinear direct power control of a multilevel Diode-Clamped Four-leg Shunt Active Power Filter
Mots clés
Multilevel four-leg shunt active-power filter, Multilevel 3D-space vector modulation, Direct power control, Predictive control, Nonlinear control.
Résumé
Multilevel four-leg four-wire converters are creating increasing interest nowadays in applications as active power filters. They present several advantages compared to the three-leg converter topologies. Recently the control complexity has been reduced thanks to the use of new and powerful microprocessor systems, In this thesis the topology of a multilevel four-leg shunt active-power filter (SAPF) is given. The SAPF compensates harmonic and reactive power in a three-phase four-wire system, which operates in unbalanced and non-sinusoidal conditions. Different versions of direct power control strategies have been presented for multilevel four-leg SAPF, namely: the Direct Power Control with Three- Dimensional Space Vector Modulation (DPC-3DSVM), the Predictive Direct Power control (PDPC) and Predictive Direct Power Control with Three-Dimensional- Space Vector Modulation (PDPC-3DSVM). Various nonlinear control techniques are introduced to improve the direct power control strategies. This is particularly the state feedback linearization, backstepping control, fuzzy logic control, neural network, passivity based control and sliding mode control. These methods have proven their effectiveness in terms of reducing the total harmonic distortion, response time and eliminate overshoot of the DC bus voltage.
Statut
Validé