ELECTRICAL STRESSES OF DC CABLE INSULATION
Cristina Stancu, Petru Notingher
Strony: 106-123
Opublikowano: 1 Jan 2013
Wyświetlenia: 233
Pobrania: 16
Streszczenie: The DC electric power transmission through power lines represents one of the most important concerns of the electricity producers and users. Unfortunately the polymeric insulated cables have an important disadvantage: the development of a space charge inside the insulation (which modifies the electric field repartition) and especially its long persistence after the voltage switching-off. In this paper a computation method of the electric field in the homogeneous polymeric insulation of a DC cable is presented. It is assumed that the cable is in operation and some charge layers near the inner and outer semiconducting layers are presented. The computations are done for a medium voltage cable and show that an important local increase of the electric field (near the inner semiconductor layer) is produced. This increase depends on the sign and amount of the charge and on the layer thickness and may lead to the breakdown of the insulation at lower voltages.
Słowa kluczowe: power cables, lifetime, polyethylene, water trees, failure
Cytowanie artykułu: Cristina Stancu, Petru Notingher. ELECTRICAL STRESSES OF DC CABLE INSULATION. Journal of International Scientific Publications: Materials, Methods & Technologies 7, 106-123 (2013). https://www.scientific-publications.net/en/article/1003042/
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