Charge relaxation on surfaces of polymeric insulating materials for outdoor applications.

• Autorzy: Sjostedt H. , Montano R. , Serdyuk Y. , Gubański M.
• Konferencja: APTADM 2007, III International Conference on Advances in Processing Testing and Application of Dielectric Materials., September, 26-28, 2007 Wrocław, Poland
• Języki publikacji: EN

Abstrakty

EN

This paper presents studies 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 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 proc the considered system, which took place in 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: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
• Rocznik: 2007
• Tom: Vol. 46, nr 19
• Strony: 17--20
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Sjostedt H.

autor

Montano R.

autor

Serdyuk Y.

autor

Gubański M.

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

Bibliografia

• [1] Hackam R., Outdoor HV Composite Polymeric Insulators, IEEE Trans. Dielect. Elect. Insul., Vol. 6, No. 5, 1999, pp. 557-585.
• [2] Blennow J. and Sorqvist T., Effect of Surface Charge on Flashover Voltage of Polymer Materials, Proc. 19"' Nordic Insul. Symp., Trondheim, Norway, June 2005, 13-15.
• [3] Zhou Y.X., Zhang B.L., Bu D., Wang N.H., Wang N.Y., Liang X.D. and Guan Z.C., Nanosecond Pulse Corona Charging of Polymers, IEEE Transaction on Dielectrics and Electrical Insulation, Vol. 14, No. 2, 2007, pp. 495-501.
• [4] Serdyuk Yu. V. and Gubanski S. M., Computer Modelling of Interaction of Gas Discharge Plasma with Solid Dielectric Barriers, IEEE Trans. Dielectrics and Electrical Insulation, Vol. 12, No. 4, 2005, pp. 725-735.
• [5] Mauseth F., Charge Accumulation in Rod-plane Air Gap with Covered Rod, Doctoral theses at NTNU, 2007.
• [6] Baum E. A., Lewis T. J. and Toomer R., Decay of Electrical Charge on Polyethylene Films, J. Phys. D: Appl. Phys, Vol. 10, 1977, pp. 487-497.
• [7] Baum E. A., Lewis T. J. and TOOMER R., Further Observations on the Decay of Surface Potential of Corona Charged Polyethylene Films, J. Phys. D: Appl. Phys, Vol. 10, 1977, pp. 2525-2531.