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Symmetrical and unsymmetrical short-circuit current of squirrel-cage and doubly-fed induction generators

Sulla, Francesco LU ; Svensson, Jörgen LU and Samuelsson, Olof LU (2011) In Electric Power Systems Research 81(7). p.1610-1618
Abstract
A general method for calculating the short-circuit currents of a squirrel-cage (SCIG) and a doubly fed induction generator (DFIG) using crowbar protection is presented. The method results in an approximate analytic expression that allows calculating the SCIG and DFIG short-circuit currents as a function of time for symmetrical and unsymmetrical faults in the power system. The presented theoretical analysis highlights some important differences between the short-circuit behavior of the SCIG and the DFIG with high crowbar resistance. A comparison with time simulations of the same model shows that the proposed approach leads to results whose accuracy is comparable to those obtained through dynamic simulations and may be sufficient to replace... (More)
A general method for calculating the short-circuit currents of a squirrel-cage (SCIG) and a doubly fed induction generator (DFIG) using crowbar protection is presented. The method results in an approximate analytic expression that allows calculating the SCIG and DFIG short-circuit currents as a function of time for symmetrical and unsymmetrical faults in the power system. The presented theoretical analysis highlights some important differences between the short-circuit behavior of the SCIG and the DFIG with high crowbar resistance. A comparison with time simulations of the same model shows that the proposed approach leads to results whose accuracy is comparable to those obtained through dynamic simulations and may be sufficient to replace the use of simulations in many contexts, e.g. calculation of maximum current, calculation of its DC and AC components and short-circuit calculations for protection relay settings. (C) 2011 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Short circuit currents, Wind power generation, Doubly fed induction, generators (DFIG), Protection
in
Electric Power Systems Research
volume
81
issue
7
pages
1610 - 1618
publisher
Elsevier
external identifiers
  • wos:000291774000042
  • scopus:79956099970
ISSN
1873-2046
DOI
10.1016/j.epsr.2011.03.016
language
English
LU publication?
yes
id
e02bf54e-3393-4bb8-b96b-16e642ab7772 (old id 2056698)
date added to LUP
2011-07-26 10:33:09
date last changed
2017-11-12 03:13:29
@article{e02bf54e-3393-4bb8-b96b-16e642ab7772,
  abstract     = {A general method for calculating the short-circuit currents of a squirrel-cage (SCIG) and a doubly fed induction generator (DFIG) using crowbar protection is presented. The method results in an approximate analytic expression that allows calculating the SCIG and DFIG short-circuit currents as a function of time for symmetrical and unsymmetrical faults in the power system. The presented theoretical analysis highlights some important differences between the short-circuit behavior of the SCIG and the DFIG with high crowbar resistance. A comparison with time simulations of the same model shows that the proposed approach leads to results whose accuracy is comparable to those obtained through dynamic simulations and may be sufficient to replace the use of simulations in many contexts, e.g. calculation of maximum current, calculation of its DC and AC components and short-circuit calculations for protection relay settings. (C) 2011 Elsevier B.V. All rights reserved.},
  author       = {Sulla, Francesco and Svensson, Jörgen and Samuelsson, Olof},
  issn         = {1873-2046},
  keyword      = {Short circuit currents,Wind power generation,Doubly fed induction,generators (DFIG),Protection},
  language     = {eng},
  number       = {7},
  pages        = {1610--1618},
  publisher    = {Elsevier},
  series       = {Electric Power Systems Research},
  title        = {Symmetrical and unsymmetrical short-circuit current of squirrel-cage and doubly-fed induction generators},
  url          = {http://dx.doi.org/10.1016/j.epsr.2011.03.016},
  volume       = {81},
  year         = {2011},
}