Open AccessTransformer‐less five‐level high‐voltage full‐scale converter with a self‐balance auxiliary circuit for 10 MW wind turbines
Author(s) -
Zeng Xiangjun,
Wang Hang,
Zhang Xiao,
Gong Deling,
Yang Xu
Publication year - 2017
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.2017.0007
Subject(s) - transformer , inverter , rectifier (neural networks) , control theory (sociology) , ćuk converter , wind power , voltage , forward converter , electrical engineering , engineering , boost converter , electronic engineering , computer science , control (management) , stochastic neural network , machine learning , artificial intelligence , recurrent neural network , artificial neural network
A novel transformer‐less five‐level (5L) high‐voltage full‐scale converter is proposed for 10 MW wind turbines. In this scheme, a unidirectional sinusoidal 5L‐Vienna rectifier is used as a variable‐speed controller at the generator side, and a conventional 5L neutral‐point‐clamped (NPC) inverter is used as the grid‐integrated converter. The intrinsic dc‐link NP imbalance issue is solved only by a proposed dc‐link self‐balance auxiliary circuit. This study focuses on the modulation technology of the rectifier and the operational principle of the auxiliary circuit. Furthermore, it presents a control strategy for the proposed converter. Finally, the small‐scale experiments are carried out to verify the analysis.