Title :
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
fDate :
11/1/1996 12:00:00 AM
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;
Journal_Title :
Generation, Transmission and Distribution, IEE Proceedings-
DOI :
10.1049/ip-gtd:19960678
