Open AccessFault‐tolerant control of dual three‐phase PMSG wind turbine drive system with one channel of faulty rectifier
Author(s) -
Hu Yashan,
Li Xuefei
Publication year - 2020
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
eISSN - 1752-1424
pISSN - 1752-1416
DOI - 10.1049/iet-rpg.2019.1125
Subject(s) - rectifier (neural networks) , control theory (sociology) , fault (geology) , inverter , turbine , permanent magnet synchronous generator , torque ripple , engineering , voltage , electrical engineering , computer science , direct torque control , induction motor , control (management) , recurrent neural network , geology , stochastic neural network , machine learning , artificial intelligence , seismology , artificial neural network , mechanical engineering
This study proposes a fault‐tolerant control to suppress the second harmonic (2 h) torque ripple and DC bus voltage ripple simultaneously in dual three‐phase permanent‐magnet synchronous generator (PMSG) wind turbine drive system by negative‐sequence current compensation when one channel of the rectifier is faulty. In the dual three‐phase PMSG system with two channels of back‐to‐back rectifier/inverter, only the other healthy channel can keep working with up to half‐rated power if one channel of rectifier fails. In some scenarios, the healthy channel might be asymmetric, which will result in 2 h torque, power and corresponding DC bus voltage ripples in the reduced rectifier/inverter operation. In the previous research, the 2 h torque and DC bus voltage ripples are suppressed simultaneously by compensation with some extra hardware in parallel with DC bus or in series with phase windings, which increases the system cost. In this work, by utilising the inverter and three‐phase windings in the faulty channel which are still functional, the 2 h torque and DC bus voltage ripples can be suppressed effectively without any extra hardware, which is validated on a prototype dual three‐phase PMSG wind turbine drive system.