An Application of HVDC to the de-icing of Transmission Lines

Ice accumulation on transmission lines in extreme climatic events can result in severe damage to the lines and towers, with the possibility of being unable to restore the service quickly enough to preserve electricity supplies to customers. To prevent such a situation, Hydro-Quebec TransEnergie are...

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Bibliographic Details
Published inProceedings of the ... IEEE Power Engineering Society Transmission and Distribution Conference pp. 529 - 534
Main Authors Horwill, C., Davidson, C.C., Granger, M., Dery, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2006
Subjects
Cities and towns
Distributed parameter circuits
HVDC transmission
Ice
Poles and towers
Power transmission lines
Static VAr compensators
Substations
Transmission lines
Valves
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Summary:Ice accumulation on transmission lines in extreme climatic events can result in severe damage to the lines and towers, with the possibility of being unable to restore the service quickly enough to preserve electricity supplies to customers. To prevent such a situation, Hydro-Quebec TransEnergie are investing in a dedicated "De-icer" installation at its strategically important Levis substation, near Quebec city. The HVDC-based installation, scheduled for handover in August 2006, injects a high direct current into the transmission line to be de-iced. When not being used as a de-icer, the installation operates as a static var compensator (SVC), using the HVDC valves as a thyristor controlled reactor (TCR) in a circuit which minimises the power losses of the valves. The detailed function of the de-icer installation is described in the paper, along with descriptions of the principal equipments and the circuit topologies used in the two modes
ISBN:0780391942
9780780391949
ISSN:2160-8555
DOI:10.1109/TDC.2006.1668552