Evaluation of LVRT capability and stability analysis of VSC based advanced control approach for grid connected PV system under grid fault conditions.

Autor:	Zahloul H; Department of Engineering, Durham University, DH1 3LE, Durham, United Kingdom.; Electrical Engineering Department, High Institute of Science and Technology, Tiji, Libya., Khaliq A; Department of Engineering, Durham University, DH1 3LE, Durham, United Kingdom.; Architectural Engineering and Design Department, University of Engineering and Technology Lahore, Lahore, Pakistan., Hamzehbahmani H; Department of Engineering, Durham University, DH1 3LE, Durham, United Kingdom., Veremieiev S; Department of Engineering, Durham University, DH1 3LE, Durham, United Kingdom., Salous S; Department of Engineering, Durham University, DH1 3LE, Durham, United Kingdom.
Jazyk:	angličtina
Zdroj:	Heliyon [Heliyon] 2024 Feb 23; Vol. 10 (5), pp. e26935. Date of Electronic Publication: 2024 Feb 23 (Print Publication: 2024).
DOI:	10.1016/j.heliyon.2024.e26935
Abstrakt:	Short circuit faults are a prevalent issue in power systems, causing disruptions to the grid's normal operation. Dynamic behaviours of the conventional power systems during short circuit faults have been extensively studied and understood. The bulk of ongoing research and development are focusing on the dynamic performance of grid-connected renewable energy systems under these fault conditions, due to changes in the grid code and a decrease in system inertia. The development of effective control strategies to enhance the system's reliability during fault conditions is of paramount importance. In this paper, a two-stages grid-connected photovoltaic system (GCPV) having a rated power of 2 MW was created in the MATLAB/Simulink environment. The dynamic behaviour of the presented system was evaluated in two scenarios: steady state conditions and short circuit faults. A line-to-ground short circuit fault was created at the grid side, and its effect on the PV system's operation was observed. An advanced control system was designed to maintain stability during fault conditions. The results demonstrated the efficiency of the designated control system in minimizing the effects of short circuit faults on the GCPV system's function, and restoring the system promptly after the fault was cleared. Furthermore, considering modifications in grid regulations, the low voltage ride through (LVRT) capability of the designed system was analysed and validated according to the UK standards. The Total Harmonic Distortion (THD) level at the common coupling point was also analysed for voltage and current, remaining below the acceptable level of 5% as specified in the IEEE Std. 519. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2024 Published by Elsevier Ltd.)
Databáze:	MEDLINE
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