On-line leakage current monitoring of 400 kV insulator strings in polluted areas

Author

Fierro-Chavez, J.L. ; Ramirez-Vazquez, I. ; Montoya-Tena, G.

Author_Institution

Dept. of Mater., Inst. de Investigaciones Electr., Temixco, Mexico

Volume

143

Issue

6

fYear

1996

fDate

11/1/1996 12:00:00 AM

Firstpage

560

Lastpage

564

Abstract

The insulation of the 400 kV transmission lines located in the Northeast part of Mexico (Monterrey) have experienced flashover problems due to pollution accumulation. Several actions have been taken to increase their reliability (washing, use of RTV coatings, insulators with longer leakage distance, etc.). In order to help the maintenance work on these lines, a system for the measurement of leakage current and surface resistance of insulators has been developed. The system was installed in several towers along the line as a diagnostic tool to monitor the surface condition of the polluted insulation. The development, laboratory tests and installation of the system in the field are reported

Keywords

electric current measurement; electric resistance measurement; flashover; insulator contamination; insulator testing; leakage currents; maintenance engineering; poles and towers; power overhead lines; 400 kV; RTV coatings; flashover problems; insulator strings; laboratory tests; leakage distance; maintenance work; online leakage current monitoring; overhead transmission lines; polluted areas; pollution accumulation; reliability improvement; surface resistance measurement; towers; washing;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:19960678

Filename

556742