Open AccessFive‐level inverter for solar system and its self‐adaptive pulse‐width modulation strategy
Author(s) -
Wang Fei,
Wang Yong,
Hang Lijun,
Wang Chengmin
Publication year - 2016
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.2014.0409
Subject(s) - inverter , pulse width modulation , commutation , electronic engineering , harmonic , modulation (music) , computer science , inductance , power (physics) , control theory (sociology) , path (computing) , engineering , electrical engineering , physics , voltage , acoustics , control (management) , quantum mechanics , artificial intelligence , programming language
Five‐level inverters have been used in solar systems because of their smaller harmonic, smaller filter inductance, and less power network pollution than those of the three‐level inverters. This study compares the advantages and disadvantages of I‐type five‐level inverters and T‐type five‐level inverters, involving the conduction loss, commutation path in reactive power, and switching loss, especially at high frequency. On the basis of the drawbacks of I‐type and T‐type five‐level inverters, this study proposes a novel five‐level inverter for solar systems and its relevant self‐adaptive pulse‐width modulation strategy, aiming at reducing both the conduction loss and switching loss at high frequency, and solving their common issue of unbalanced devices dissipation. A prototype has been built to verify the operation and performance of the proposed inverter.