IEEE Power & Energy Magazine - March/April 2016 - 58

Extending
Their Lifetimes
By Neil M. Kirby, Paul E. Marken, Michael Paradis,
Pei Wang, Ian Plowright, Hyung-Bae Moon,
Dag Ingemansson, Reginald Mendis,
and Ben Mehraban

H

Keeping HVdc
and FACTS
Installations in
Service Longer

IMAGE LICENSED BY INGRAM PUBLISHING

HIGH-VOLTAGE (HV) DC TRANSmission and flexible ac transmission
systems (FACTSs) have been in operation for over 50 years, and in many cases
these installations have become an indispensable part of many power networks
around the world. With a design life of
typically 30 years, some of the original
installations have already been, or are
presently being, partially refurbished or
replaced, while others are in the planning
stages for some method of life extension.
The strategy adopted for extending the
life of an HVdc system depends on many
factors, both commercial and technical,
and ranges from refurbishment through
the replacement of a few components, to
replacement of the complete link. Individual installations have their own specific
issues, such as increasing levels of maintenance, obsolescence of particular components, or increasing failure and outage
rates, which all lead to a real or perceived
risk to availability in the near future.
In North America in particular, there
were a number of HVdc systems constructed by General Electric (GE) over a
relatively short period around 1980, which
are now in the analysis or contracting stage
preparing for refurbishment. This article
Digital Object Identifier 10.1109/MPE.2015.2501222
Date of publication: 18 February 2016

march/april 2016

1540-7977/16©2016IEEE

ieee power & energy magazine

57



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