PARTIAL DISCHARGES IN POWER CABLE JOINT INSULATION MODELS
Published: 6 Sep 2018
Abstract: High-voltage power cables, terminations and joints are factory-tested before installation to ensure quality and reliability according to customer requirements and standards. However, cables can be damaged during transportation, laying and during the installation of terminations and joints. These defects may not cause initial failure under voltage but can create partial discharge (PD) in the insulation system. If allowed to continue, partial discharge will erode the insulation, usually forming a tree-shaped pattern of deterioration (electrical tree) and eventually result in complete breakdown and failure of the cable or accessory. Such failures cause unplanned power outages, loss of plant production, equipment damage, and/or personnel injury. Partial discharges may intensify during the operation of electrical equipment due to electrical, thermal or environmental stresses. In this paper, partial discharge parameters defined in the IEC 60270 (apparent charge, inception field and pulse repetition rate), on unaged and thermally aged joint plane models, made of XLPE/EPR, are measured. The results show that the inception field decreases on thermally aged samples. If the ageing time increases the inception field decreases further. On the other hand, the apparent charge and pulse repetition rate increase with the ageing time as well.
Keywords: cable joints, xlpe/epr models, thermal ageing, partial discharges, specific apparent charge
Cite this article: Cristina Stancu, Petru V. Notingher, Lucian Taranu, Laurentiu Badicu. PARTIAL DISCHARGES IN POWER CABLE JOINT INSULATION MODELS. Journal of International Scientific Publications: Materials, Methods & Technologies 12, 123-136 (2018). https://www.scientific-publications.net/en/article/1001688/
Download full text
Back to the contents of the volume
© 2022 The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/
, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This permission does not cover any third party copyrighted material which may appear in the work requested.