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Island Operation of the Induction Generator - Fault Currents and Protection

Sulla, Francesco LU (2007) In TEIE 7220.
Abstract
During the last years, costs for power interruptions to customers have increased and

from 2011 a new legislation will not allow power interruptions longer than 24 hours.

Electric power utilities are facing important costs to decrease the likelihood of power

interruption in the future.

Island operation of distribution systems is not commonly employed in Sweden, also

for safety reasons. The penetration of distributed generation into distribution

networks is expected to grow in the next years; induction generators will represent a

large amount of distributed generation and may dominate in local areas.

In this scenario, island operation of distribution networks with... (More)
During the last years, costs for power interruptions to customers have increased and

from 2011 a new legislation will not allow power interruptions longer than 24 hours.

Electric power utilities are facing important costs to decrease the likelihood of power

interruption in the future.

Island operation of distribution systems is not commonly employed in Sweden, also

for safety reasons. The penetration of distributed generation into distribution

networks is expected to grow in the next years; induction generators will represent a

large amount of distributed generation and may dominate in local areas.

In this scenario, island operation of distribution networks with distributed generation

can be regarded as a means to reduce power interruptions to final customers and

improve power supply security. There are still many barriers to be removed before

island operation of distribution networks can be accepted. Beside safety reasons, the

quality of the delivered power may be a concern.

With induction generators operating in an island system, voltage and frequency

control issues must be addressed; moreover safe operation requires that the protection

system be adequately adapted so that any fault in the distribution system operating in

island is promptly detected and cleared.

In this report, the behaviour of the induction generator in island operation under

faulted conditions is investigated through simulations and some protection issues are

addressed. But first a brief overview on earthing practices of distribution networks in

Sweden is performed. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Book/Report
publication status
published
subject
in
TEIE
volume
7220
publisher
Department of Industrial Electrical Engineering and Automation, Lund Institute of Technology
external identifiers
  • Other:CODEN:LUTEDX/(TEIE-7220)/1-069/(2007)
language
English
LU publication?
yes
id
021dd162-59e3-4c43-946d-6f70674c4ae7 (old id 588149)
alternative location
http://www.iea.lth.se/publications/Reports/LTH-IEA-7220.pdf
date added to LUP
2007-10-30 12:07:20
date last changed
2016-04-16 07:55:56
@misc{021dd162-59e3-4c43-946d-6f70674c4ae7,
  abstract     = {During the last years, costs for power interruptions to customers have increased and<br/><br>
from 2011 a new legislation will not allow power interruptions longer than 24 hours.<br/><br>
Electric power utilities are facing important costs to decrease the likelihood of power<br/><br>
interruption in the future.<br/><br>
Island operation of distribution systems is not commonly employed in Sweden, also<br/><br>
for safety reasons. The penetration of distributed generation into distribution<br/><br>
networks is expected to grow in the next years; induction generators will represent a<br/><br>
large amount of distributed generation and may dominate in local areas.<br/><br>
In this scenario, island operation of distribution networks with distributed generation<br/><br>
can be regarded as a means to reduce power interruptions to final customers and<br/><br>
improve power supply security. There are still many barriers to be removed before<br/><br>
island operation of distribution networks can be accepted. Beside safety reasons, the<br/><br>
quality of the delivered power may be a concern.<br/><br>
With induction generators operating in an island system, voltage and frequency<br/><br>
control issues must be addressed; moreover safe operation requires that the protection<br/><br>
system be adequately adapted so that any fault in the distribution system operating in<br/><br>
island is promptly detected and cleared.<br/><br>
In this report, the behaviour of the induction generator in island operation under<br/><br>
faulted conditions is investigated through simulations and some protection issues are<br/><br>
addressed. But first a brief overview on earthing practices of distribution networks in<br/><br>
Sweden is performed.},
  author       = {Sulla, Francesco},
  language     = {eng},
  publisher    = {ARRAY(0xa21a520)},
  series       = {TEIE},
  title        = {Island Operation of the Induction Generator - Fault Currents and Protection},
  volume       = {7220},
  year         = {2007},
}