XLPE电力电缆综合绝缘诊断策略研究

Study on the Composite Insulation Diagnosis in XLPE Power Cables

长久以来,有关交联聚乙烯(XLPE)电缆绝缘现场试验或诊断被清晰的分为离线和在线两类,绝缘监测目标也往往以针对电缆本体或针对电缆附件区别对待。本文第一次提出针对电缆整体,在电缆整个运行期的综合绝缘监视方法,同时提出以在线监测为主,离线绝缘诊断为辅的综合绝缘评价策略,论证了推行这种策略的必要性。

The on-site testing or diagnosis on cross-linked polyethylene （XLPE） insulated cables has long been divided into two categories, i.e. on-line and off-line diagnosis. Similarly, in terms of the object of diagnosis, the insulation diagnosis has been divided into the diagnosis of the cable body and that of cable accessories. In this paper, a composite insulation monitoring technique with both cable and accessories as object of diagnosis is presented for the first time. At the same time, a composite insulation assessment consists of mainly on-line monitoring aided by off-line monitoring is also presented. The necessity of using this composite insulation assessment is demonstrated in this paper.