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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Indonesian Journal of Electrical Engineering and Computer Science
Zaghar, Fatim-Zahra
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Control & Systems Engineering Electrical & Electronics Engineering

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A novel nonlinear controller design of three-phase grid-tied photovoltaic system Zaghar, Fatim-Zahra; Hekss, Zineb; Rafi, Mohamed; Echalih, Salwa; Ridah, Abdraouf
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 15, No 3: September 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v15.i3.pp1499-1507

Abstract

This paper explores the challenges associated with the control of a two-stage three-phase electrical grid connected to a photovoltaic (PV) system. The core control objectives encompass: i) Maximizing the utilization of available power from the PV panel; ii) Regulating the DC-link voltage to a predetermined reference; and iii) Ensuring power factor correction (PFC) on the grid side. To achieve these objectives, two loops nonlinear controller are developed. In the outer loop, the duty cycle of a boost converter is controlled using integral backstepping technique with the perturb & observe (P&O) algorithm, which provides reference voltages to track maximum power points, and Lyapunov theory to ensure the system’s stability. In addition, the Inner loop is designed using proportional integrator (PI) controller to ensure the unit power factor correction. An assessment of the proposed method is conducted through a comparative study with the backstepping technique, demonstrating the effectiveness of the suggested solution. The results have been validated by numerical simulation within MATLAB/Simulink power systems environment.
Advanced control of double stage grid-tied three phase photovoltaic systems with shunt active power filter Zaghar, Fatim-Zahra; Hekss, Zineb; Rafi, Mohamed; Ridah, Abderraouf; Adhiri, R’hma
Indonesian Journal of Electrical Engineering and Computer Science Vol 35, No 2: August 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v35.i2.pp673-682

Abstract

This paper explores the challenges associated with the control of a two-stage three-phase electrical grid connected to a photovoltaic (PV) system. The objectives encompass: i) maximizing the available PV power, ii) controlling the DC-link voltage to a predetermined setpoint, and iii) considering that power quality has become an important measure in a distribution electrical network where different loads are connected, the third objective will mainly focus on ensuring power factor correction (PFC). To achieve these objectives, two loops of nonlinear controller are developed. In the outer loop, the duty cycle of a boost converter is controlled using a hybrid technique of backstepping technique and the perturb & observe (P&O) algorithm. In addition, the inner loop employs a hybrid automaton approach to tackle the challenges of a three-phase shunt active power filter (SAPF). The results have been verified through numerical simulation using MATLAB/Simulink power systems environment.
Co-Authors Adhiri, R’hma Echalih, Salwa Hekss, Zineb Rafi, Mohamed Ridah, Abderraouf Ridah, Abdraouf