水树老化XLPE电缆绝缘温度特性的研究

Study on the temperature characteristic of water-treed XLPE cable insulation

为了确保电力系统的安全可靠运行,运行中的XLPE绝缘电力电缆老化状态的评价和估计具有十分现实的意义。本文通过实验,研究了温度对水树老化XLPE电缆绝缘的tgδ、损耗电流谐波分量的影响,并探讨了采用电缆绝缘的交流不平衡分量来诊断电缆中水树状态的可行性。

The assessment of the ageing conditions of XLPE power cables is very improtant to ensure a safe and reliable operation of power system. This paper studied the effect of temperatures on tanδ and harmonic component of loss current of watertreed XLPE cable insulation by experiments and investigated the feasibility to diagnose the ageing conditions of watertreed XLPE cable by measuring AC unbalanced component.