Measurements on treeing resistance with a new electrode design.

• Autorzy: Huuva R. , Englund V. , Gubański S. , Hjertberg T.
• 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

Electrical treeing in high voltage cable insulation has been studied for several years and today the mostly used laboratory test set-up is the needle-plane electrode configuration. In this paper another electrode configuration is suggested. The new electrode configuration makes use of a thin tungsten wire as the electrode that delivers the high and divergent electric stress needed to initiates electrical tree growth in insulation material. Multiple electrical trees are formed during the testing, which allows determining the treeing initiation field as well as the rate of tree growth. A comparison between tree initiation conditions in samples prepared of pure LDPE and XLPE materials is shown and the data are fit by 3-parameter Weibull distributions. Electrical trees start to develop in LDPE material at lower field strength than in XLPE one and two different mechanisms of tree initiation are identified in LDPE. Improvement imposed on the treeing initiation field by adding voltage stabilizing additives to XLPE is also illustrated.

Słowa kluczowe

EN

cable insulation; testing; electrical treeing; XLPE; LDPE

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje
• Rocznik: 2007
• Tom: Vol. 46, nr 19
• Strony: 75--81
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Huuva R.

autor

Englund V.

autor

Gubański S.

autor

Hjertberg T.

• High Voltage Engineering, Dept. of Materials and Manufacturing Technology

Bibliografia

• [1] Martinotto L., Peruzzotti F., Del Brenna M., Cable, in particular for transport or distribution of electrical energy an insulating composition, Pirelli Cables, patent WO 01/08166 Al, Italy, 2001.
• [2] Bartinikas R., Eichhorn R.M., Engineering Dielectrics, Volume HA Electrical Properties for Solid Insulating Material: Molecular Structure and Electrical Behavior, ASTM STP 783. Baltimore, 1983.
• [3] ASTM D 3756-97, Standard test method for evaluation of resistance to electrical breakdown by treeing in solid dielectric materials using diverging field, 1998.
• [4] Jiang G., Kuang J., Boggs S., Critical parameters for electrical tree formation in XLPE, IEEE Trans, on Power Delivery, Vol. 13, 1998, pp. 292.
• [5] Bamji S.S., Electroluminescence - a technique to detect the initiation of degradation in polymeric insulation, IEEE Electr. Insul. Mag., Vol. 15, 1999, pp. 9.
• [6] Bozzo R., Guastavino F., Montanari G.C., Electrical tree tests. Probabilistic inference and insulating material evaluation, IEEE Trans, on Dielectr. and Electr. Insul., Vol. 5, 1998, pp. 734.
• [7] Dissado L.A., Fothergill J.C., Electrical degradation and breakdown in polymers, London 1992.
• [8] Comsol Multiphysics, Sweden, Comsol AB, 2006.
• [9] Yoshimura N., Fujita S., Noto F., Comparison of single and double needle tests for evaluation of resistance to treeing breakdown, IEEE Trans, on Electr. Insul., Vol. 18, 1983, pp. 42.
• [10] Kuffel E., Z A Engl W.S., Kuffel J., High Voltage Engineering: Fundamentals, Butterworth-Heinemann, 2003.
• [11] IEEE Guide for the Statistical Analysis of Electrical Insulation Breakdown Data, IEEE std 930-2004, 2005.
• [12] Huuva R., Englund V., Gubański S.M., Hjertberg T., Development of New Test Set-up for Investigation of Electrical Tree Inception in Polyethylene. Proceeding of the 19th Nordic Insulation Symposium, 2005, pp. 178-181.