A Novel Control Strategy in Grid-Integrated Photovoltaic System for Power Quality Enhancement

Mpho Sam Nkambule, Ali N. Hasan, Ahmed Ali and Thokozani Shongwe
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Mpho Sam Nkambule: Department of Electrical and Electronic Engineering, Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg 2092, South Africa
Ali N. Hasan: Department of Electrical Engineering, Faculty of Engineering Science and Technology, Higher Colleges of Technology, Abu Dhabi 25026, United Arab Emirates
Ahmed Ali: Department of Electrical and Electronic Engineering, Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg 2092, South Africa
Thokozani Shongwe: Department of Electrical and Electronic Engineering, Faculty of Engineering and Built Environment, University of Johannesburg, Johannesburg 2092, South Africa

Energies, 2022, vol. 15, issue 15, 1-31

Abstract: The integration of solar photovoltaic (PV) systems and utility grids has gradually gained significant interest in improving the sustainability of clean power supply for society. However, power quality remains a challenge due to partial shading conditions and harmonics. To overcome these drawbacks, a flexible radial movement optimization based on a dynamic safety perimeter maximum power point tracking algorithm is employed to track maximum power out of a PV system and to ensure that the optimum voltage level at the common DC bus is obtained under partial shading conditions using fixed-tilt installation configuration. Furthermore, a novel inverter control loop system with a double second order generalized integrator phase-locked loop (DSOGI-PLL) is also proposed to mitigate harmonics and improve the power quality of the grid interfacing PV system using MATLAB SIMULINK software. The proposed system has several merits, such as better harmonic suppression capability, control adaptivity, rapid tracking speed, low computational burden and phase and grid synchronization.

Keywords: photovoltaic system; maximum power point tracking; flexible radial movement optimization (FRMO); dynamic safety perimeter (DSP); partial shading conditions (PSC); inverter control loop system (ICLS); power quality (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: 2022
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