DocumentCode
2290599
Title
Corrosion in HVDC valve cooling systems
Author
Jackson, P.O. ; Abrahamsson, B. ; Gustavsson, D. ; Igetoft, L.
Author_Institution
ABB Power Syst., Sweden
fYear
1996
fDate
15-20 Sep 1996
Firstpage
170
Lastpage
173
Abstract
Stainless steel couplings in the main cooling water pipes of HVDC thyristor valves have been in use since 1983, with an overall satisfactory behavior. However, some water leakage due to corrosion below the sealing O-rings of the couplings was observed during 1992. An extensive investigation and follow-up worldwide showed a direct correlation between water quality and the corrosion rate of the stainless steel couplings. Recommendations are given about actions to be taken in order to maintain a long lifetime for the fine water systems
Keywords
HVDC power convertors; cooling; corrosion; seals (stoppers); stainless steel; thyristor convertors; HVDC valve cooling systems; accelerated corrosion; cooling water pipes; corrosion; dissolved oxygen removal; electrolysis; fine water systems; polypropylene couplings; sealing O-rings; stainless steel couplings; water leakage; water quality; Cooling; Corrosion; Couplings; HVDC transmission; Heat pumps; Steel; Structural rings; Thyristors; Valves; Water heating;
fLanguage
English
Publisher
ieee
Conference_Titel
Transmission and Distribution Conference, 1996. Proceedings., 1996 IEEE
Conference_Location
Los Angeles, CA
Print_ISBN
0-7803-3522-8
Type
conf
DOI
10.1109/TDC.1996.545931
Filename
545931
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