Open AccessDesign of mode switching scheme for low‐voltage ride‐through of doubly fed induction generators
Author(s) -
Wei Feng,
Vilathgamuwa Don Mahinda,
Shing Choi San
Publication year - 2015
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.2013.0356
Subject(s) - crowbar , induction generator , stator , doubly fed electric machine , voltage , generator (circuit theory) , control theory (sociology) , low voltage ride through , computer science , low voltage , engineering , electrical engineering , power (physics) , physics , ac power , control (management) , artificial intelligence , quantum mechanics
A mode switching doubly fed induction generator (MSDFIG) scheme is proposed for the purpose of achieving low‐voltage ride‐through for wind turbines. The MSDFIG operates as a doubly fed induction generator (DFIG) under normal condition but upon the detection of a low‐voltage incident, the generator is to smoothly transfer to operate under the induction generator mode through the switching in of a set of stator‐side crowbar. The MSDFIG automatically reverts back to the DFIG mode when network voltage recovers. A new strategy on the control of the crowbar resistance is included. Analysis shows that the proposed MSDFIG scheme can ride through the complete low‐voltage and voltage recovery stages. Effectiveness of the scheme is demonstrated through simulation and experiment studies.