Open AccessNovel individual voltage balancing control scheme for multilevel cascade active‐front‐end rectifier
Author(s) -
Liu Chuang,
Zhao Fangyi,
Cai Guowei,
Huang Nantian,
Wang Jianze,
Wang Mingyan
Publication year - 2014
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.2012.0257
Subject(s) - cascade , control theory (sociology) , rectifier (neural networks) , controller (irrigation) , compensation (psychology) , computer science , voltage , dual (grammatical number) , precision rectifier , front and back ends , engineering , control (management) , power factor , artificial neural network , electrical engineering , art , artificial intelligence , psychoanalysis , stochastic neural network , literature , recurrent neural network , biology , operating system , psychology , machine learning , agronomy , chemical engineering
In this study, a novel individual voltage balancing control scheme for multilevel cascade active‐front‐end rectifier is proposed to allow a different voltage setting capability among different dc outputs in series. First, the proportional resonant controller and admittance compensation controller are introduced for the active inner‐current control loop of cascade active‐front‐end rectifier to achieve better steady‐state and dynamic performance. Second, an assumption based on conservation of energy is proposed to decouple a series connected ac–dc system into several individual subsystems to facilitate the individual dc‐bus controller design. Both simulation and experimental results based on the cascade two‐unit cascade dual‐buck/boost‐type active‐front‐end rectifier proved the effectiveness of the proposed individual balancing control scheme, which also verified the proposed assumption.