Title :
Outdoor polymeric insulators long-term exposed to HVDC
Author :
Sorqvis, Torbjoörn ; Vlastos, A.E.
Author_Institution :
Dept. of High Voltage Eng., Chalmers Univ. of Technol., Gothenburg, Sweden
fDate :
4/1/1997 12:00:00 AM
Abstract :
Field experience from outdoor polymeric insulators exposed to HVDC under natural contamination conditions is presented. This paper summarizes the peak leakage current statistics, the hydrophobicity and the surface material conditions studied by electron spectroscopy for chemical analysis (ESCA) and attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. The results show a strong interrelation between the surface conditions and the performance with respect to leakage currents. Moreover, the results show that the surface conditions and the performance of the insulators exposed to HVDC are rather similar to those of the insulators exposed to HVAC
Keywords :
HVDC power transmission; ageing; electric breakdown; electric current measurement; insulator testing; leakage currents; polymer insulators; attenuated total reflection Fourier transform infrared spectroscopy; electron spectroscopy for chemical analysis; hydrophobicity; insulation breakdown testing; insulator performance; long-term HVDC exposure; natural contamination conditions; outdoor polymeric insulators; peak leakage current; surface material conditions; Chemical analysis; Electrons; HVDC transmission; Infrared spectra; Leakage current; Plastic insulation; Polymers; Spectroscopy; Statistical analysis; Surface contamination;
Journal_Title :
Power Delivery, IEEE Transactions on
