Open AccessModified Sandia voltage shift anti‐islanding scheme for distributed power generator systems
Author(s) -
Vazquez Erick,
Vazquez Nimrod,
Femat Ricardo
Publication year - 2020
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2020.0735
Subject(s) - islanding , total harmonic distortion , voltage , computer science , electronic engineering , power (physics) , distortion (music) , generator (circuit theory) , control theory (sociology) , scheme (mathematics) , harmonic , distributed generation , engineering , electrical engineering , mathematics , physics , acoustics , artificial intelligence , amplifier , mathematical analysis , quantum mechanics , control (management) , cmos
This study presents an active anti‐islanding technique for distributed power generator systems. The proposed scheme is based on the Sandia voltage shift (SVS) technique, which is characterised by a small non‐detection zone (NDZ) and by an acceptable solution to the trade‐off between the output power quality and the effectiveness of islanding detection. The proposed technique has the advantage to improve the NDZ and to reduce the anti‐islanding detection times. This is due to the exponential‐product modification made in the positive feedback to inject current, thereby making the response faster than SVS. Additionally, a self‐adaptive gain is considered to achieve a low total harmonic distortion at different power levels. Moreover, the proposed scheme has been validated with theoretical and numerical analysis and experimental results. Finally, the behaviour and performance of the proposed technique are compared with other recent techniques.