Charge relaxation on surfaces of polymeric insulating materials for outdoor applications

• Autorzy: Sjöstedt H. , Montano R. , Serdyuk Y. , Gubanski S. M.
• Języki publikacji: EN

Abstrakty

EN

The studies have been presented on spatial and temporal distributions of surface charge on samples of ethylene propylene diene monomer (EPDM) and silicon rubber (SIR). The charge was deposited from a positive impulse corona source located at 1 mm above the polymeric surfaces. During the experiments, the number of pulses and their voltage level were varied. It was observed that the spread of the charge over the surface of the samples as well as its magnitude were both increasing with increasing number of impulses applied. EPDM accumulated charge easier and had a longer relaxation time than SIR. A common feature frequently observed in both cases was that the resulting charge distributions had a saddle-like pattern. Performed computer simulations showed that this feature can be attributed to peculiarities of the corona charging in the considered system, which took place in a form of a burst corona, and the dynamics of the deposited charges could be related to burst corona pulses.

Słowa kluczowe

EN

outdoor insulation; composite insulators; surface charge; relaxation time

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2009
• Tom: Vol. 27, No. 4/2
• Strony: 1129--1137
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Sjöstedt H.

autor

Montano R.

autor

Serdyuk Y.

autor

Gubanski S. M.

• High Voltage Valley Fredsgatan 27, Box 832 771 28 Ludvika, Sweden

Bibliografia

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• [4] SERDYUK YU.V., GUBANSKI S.M., Computer Modelling of Interaction of Gas Discharge Plasma with Solid Dielectric Barriers, IEEE Trans. Dielect. Elect. Insul., 12 (2005), 725.
• [5] MAUSETH F., Charge Accumulation in Rod-plane Air Gap with Covered Rod, PhD Thesis at NTNU, 2007.
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• [7] BAUM E.A., LEWIS T.J., TOOMER R., J. Phys. D: Appl. Phys, 10 (1977), 2525.