A Robust Control of Two-Stage Grid-Tied PV Systems Employing Integral Sliding Mode Theory

Abbes Kihal, Fateh Krim, Billel Talbi, Abdelbaset Laib and Abdeslem Sahli
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Abbes Kihal: Laboratory of Power Electronics and Industrial Control (LEPCI), Electronics Department, Faculty of Technology, University of Sétif1, Sétif 19000, Algeria
Fateh Krim: Laboratory of Power Electronics and Industrial Control (LEPCI), Electronics Department, Faculty of Technology, University of Sétif1, Sétif 19000, Algeria
Billel Talbi: Laboratory of Power Electronics and Industrial Control (LEPCI), Electronics Department, Faculty of Technology, University of Sétif1, Sétif 19000, Algeria
Abdelbaset Laib: Laboratory of Power Electronics and Industrial Control (LEPCI), Electronics Department, Faculty of Technology, University of Sétif1, Sétif 19000, Algeria
Abdeslem Sahli: Laboratory of Power Electronics and Industrial Control (LEPCI), Electronics Department, Faculty of Technology, University of Sétif1, Sétif 19000, Algeria

Energies, 2018, vol. 11, issue 10, 1-21

Abstract: This contribution considers an improved control scheme for three-phase two-stage grid-tied photovoltaic (PV) power systems based on integral sliding mode control (ISMC) theory. The proposed control scheme consists of maximum power point tracking (MPPT), DC-Link voltage regulation and grid current synchronization. A modified voltage-oriented maximum power point tracking (VO-MPPT) method based on ISMC theory is proposed for design of an enhanced MPPT under irradiation changes. Moreover, a novel DC-Link voltage controller based on ISMC theory is proposed to achieve good regulation of DC-Link voltage over its reference. To inject the generated PV power into the grid with high quality, a voltage-oriented control based on space vector modulation (SVM) and ISMC (VOC-ISMC-SVM) has been developed to control the grid current synchronization. Numerical simulations are performed in a MATLAB/Simulink TM (R2009b, MathWorks, Natick, MA, USA) environment to evaluate the proposed control strategy. In comparison with conventional control schemes, the developed control strategy provides an accurate maximum power point (MPP) tracking with less power oscillation as well as a fast and an accurate DC-Link regulation under varying irradiation conditions. Moreover, the transfer of the extracted power into the grid is achieved with high quality.

Keywords: grid-tied photovoltaic system; maximum power point tracking (MPPT); voltage-oriented control (VOC); integral sliding mode control (ISMC)theory; DC-Link control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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