Electrolytic corrosion of metal hardware of HVDC line and station insulators

Author

Taniguchi, T. ; Watanabe, M. ; Watanabe, Y. ; Mori, S. ; Watanabe, Atsuyori ; Naito, K.

Author_Institution

Central Res. Inst. of Electr. Power Ind., Yokosuka, Japan

Volume

6

Issue

3

fYear

1991

fDate

7/1/1991 12:00:00 AM

Firstpage

1224

Lastpage

1233

Abstract

Insulators on HVDC lines may be damaged by or lose their mechanical strength because of electrolytic corrosion of the metal hardware. DC exposure tests of insulators have been conducted for 20 years at the Central Research Institute of Electric Power Industry in Japan. The authors describe the results of investigations of the electrolytic corrosion of the metal hardware of DC disk insulators with zinc-sleeved pins and cylindrical insulators and of the leakage electricity quantity flowing on their surface. Methods of life estimation of the metal hardware of insulators and corrosion prevention. The mechanism of hardware cracking of station-post insulators is clarified, and measures against the cracking are proposed

Keywords

DC power transmission; cable insulation; corrosion testing; electric breakdown of solids; insulation testing; insulators; power cables; HVDC; Japan; corrosion prevention; cracking; electric breakdown; electrolytic corrosion; insulators; leakage electricity; life estimation; metal hardware; power cable insulation; Circuit testing; Corrosion; Dielectrics and electrical insulation; Electric variables measurement; HVDC transmission; Hardware; Insulator testing; Metal-insulator structures; Pollution measurement; Voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.85871

Filename

85871