Title :
Some technical consideration on very low frequency cable diagnostic
Author :
Dang, Chinh ; Pelissou, Serge
Author_Institution :
Div. Expertise - Equipments Electriques, Inst. de Recherche d´´Hydro-Quebec, Varennes, Que., Canada
Abstract :
Cable diagnostic with very low frequency (VLF) measurements has gradually evolved from laboratory research to field testing. VLF dielectric test aims to replace DC dielectric test for extruded cables because of the potentially harmful effects and ineffectiveness of DC voltage in polymeric insulation. Furthermore, dielectric loss measurements are often used for insulation diagnostic. Its application at very low frequencies has led to the development of different cable diagnostic methods. However, despite recent technical guide for dielectric tests and existing criteria of dissipation factor measurements for cable diagnostic, field experience remains unconvinced and widely divided. This paper presents some field and laboratory results on VLF testing and measurements to gain a better understanding.
Keywords :
dielectric loss measurement; power cable insulation; power cable testing; DC voltage; VLF dielectric test; dielectric loss measurements; dissipation factor measurements; field testing; low frequency cable diagnostic methods; polymeric insulation; power cable testing; very low frequency measurements; Cable insulation; Dielectric loss measurement; Dielectric measurements; Dielectrics and electrical insulation; Frequency measurement; Insulation testing; Laboratories; Plastic insulation; Polymers; Voltage;
Conference_Titel :
Transmission and Distribution Conference and Exposition, 2003 IEEE PES
Print_ISBN :
0-7803-8110-6
DOI :
10.1109/TDC.2003.1335351