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Surface Potential Decay on Material Samples Taken From In-service Aged (U) HVDC Silicone Rubber Composite Insulators

yuan chao ; congzhen xie ; licheng li ; Xiangdong Xu (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Stanislaw Gubanski (Institutionen för material- och tillverkningsteknik, Högspänningsteknik)
IEEE Transactions on Dielectrics and Electrical Insulation (1070-9878). Vol. 24 (2017), 1, p. 592-600.
[Artikel, refereegranskad vetenskaplig]

Surface potential decay characteristics of specimens extracted from in-service aged and reference UHVDC composite insulator sheds are reported and analyzed in this paper. In the experiments, surfaces of the insulator samples were charged by dc corona and the decay was recorded utilizing a non-contact technique. In addition, surface and bulk conductivities of the specimens were determined and used for analyzing by means of computer simulations their impact on the potential distribution profiles and its decay. Based on the performed experiments, trap density distributions, mobility of charge carriers and field dependent bulk conductivities are deduced for the investigated samples with the aim to evaluate the ageing severity.

Nyckelord: HVDC composite insulator, ageing, surface charging, surface potential, potential decay, charge transport, electrical conductivity.



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Denna post skapades 2017-01-30.
CPL Pubid: 247878

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Högspänningsteknik (2005-2017)

Ämnesområden

Energi
Materialvetenskap
Elektroteknik och elektronik
Kompositmaterial och -teknik

Chalmers infrastruktur