Open AccessOperating compressed‐air energy storage as dynamic reactive compensator for stabilising wind farms under grid fault conditions
Author(s) -
Le Ha Thu,
Santoso Surya
Publication year - 2013
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2011.0247
Subject(s) - wind power , grid , compressed air energy storage , energy storage , automotive engineering , fault (geology) , compressed air , computer science , control theory (sociology) , environmental science , engineering , electrical engineering , mechanical engineering , power (physics) , geology , physics , control (management) , quantum mechanics , geodesy , artificial intelligence , seismology
Compressed‐air energy storage (CAES) is considered a promising energy storage system for many grid applications, including managing renewable variability and grid capacity concerns. However, compared with conventional generation such as coal or hydro, the cost of storage power of CAES is still high, which impedes its deployment. Therefore a standing question is how to operate CAES in the most efficient and economical fashion, that is, to exploit the system functions for maximum‐possible benefit. This study investigates the CAES dynamic reactive capability used to stabilise wind farms under grid fault conditions. Two considered operation modes are motor mode with leading power factor and synchronous condenser mode. Analysis with a 60‐MW wind farm and two types of popular wind turbines, namely stall‐regulated and doubly fed induction‐generator‐based WTs, shows that the CAES performance is comparable or better than that of an static var compensator in most situations investigated. Therefore the reactive‐power‐supply function should be considered in CAES design and operation to increase the system efficiency and value.