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首页> 外文期刊>IEEE Transactions on Power Delivery >Service aged 69 and 115 kV XLPE cables
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Service aged 69 and 115 kV XLPE cables

机译:老化的69和115 kV XLPE电缆

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摘要

Five 69 kV XLPE cables, 6 to 23 years in service and two old vintage cables from storage plus a 115 kV XLPE cable from service together with a spare cable from the same production, kept in storage, were evaluated. All components of the cables were found to show little signs of deterioration except for AC breakdown. The 69 kV XLPE cable from service has breakdown levels ranging from 10.2 to 18.2 kV/mm, the spare cable 15.0 to 17.7 kV/mm compared to 27.2 kV/mm, the only previously reported value for a new cable. The 115 kV XLPE cable had a breakdown level of 16 kV/mm and the spare 10 kV/mm. The above cables are low-stress cables. Most modern cables operate at higher voltage stresses, taking advantage of cleaner insulations with smoother shields and moisture barriers. Caution is advised in using older, low-stress cables placed in storage.
机译:评估了5根69 kV XLPE电缆(使用寿命6至23年)和两根旧的老式电缆,再加上115 kV XLPE电缆以及同一生产中的备用电缆,将它们存储起来。除交流击穿外,所有电缆组件均未见损坏迹象。投入使用的69 kV XLPE电缆的击穿水平范围为10.2至18.2 kV / mm,备用电缆为15.0至17.7 kV / mm,相比之下,以前报告的新电缆值为27.2 kV / mm。 115 kV XLPE电缆的击穿水平为16 kV / mm,备用电缆为10 kV / mm。以上电缆均为低应力电缆。大多数现代电缆在较高的电压应力下运行,利用了绝缘较干净,屏蔽层和防潮层更光滑的优点。建议在存放时使用较旧的低应力电缆。

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