Open AccessSynchronization Algorithms for Grid-connected Photovoltaic Systems under Grid Disturbances
Author(s) -
Amal Satif,
Laamari Hlou,
Mohcin Mekhfioui,
Mohammed Alareqi,
Rachid Elgouri
Publication year - 2020
Publication title -
international journal of innovative technology and exploring engineering
Language(s) - English
Resource type - Journals
ISSN - 2278-3075
DOI - 10.35940/ijitee.a4760.019320
Subject(s) - photovoltaic system , phase locked loop , harmonics , grid , computer science , matlab , synchronization (alternating current) , grid connection , grid code , algorithm , software , control theory (sociology) , voltage , electronic engineering , control engineering , engineering , ac power , electrical engineering , control (management) , mathematics , telecommunications , channel (broadcasting) , geometry , artificial intelligence , jitter , programming language , operating system
The increasing employment of the photovoltaic solar energy demands suitable control techniques in order to ensure a stable and proper connection to the utility grid, especially when disturbances occur, for this reason, the Phase Locked Loop (PLL) technique is used. In this paper, the most commonly synchronization algorithms in grid-connected photovoltaic systems will be presented. The algorithms structures are described and analyzed in detail. The selected algorithms are developed in C-Code and simulated in MATLAB software from MathWorks. The behaviors of the methods are presented and explained under grid voltages disturbances (frequency variation, harmonics presence, voltage unbalances, etc.). The obtained results indicate that each of the tested PLLs has its own advantages and disadvantages, depending on the disturbances occurred into the three-phase utility grid.