A Time Domain Spectroscopy (TDS) measuring device has been developed at the Institut de recherche d'Hydro-Quebec (IREQ) to characterize the dielectric losses of HV polymeric insulation and a diagnostic is also proposed to assess the water-tree aging of polyethylene. The results obtained on new and aged miniature polyethylene (PE) cable samples show that: (i) the depolarization losses are strongly dependant on the polarization time and on temperature and (ii) the polarization and depolarization losses show a linear dependence with water-tree polyethylene degradation.
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机译：在Institut de Recherche D'Hydro-Quebec（IREQ）上开发了时域光谱（TDS）测量装置，以表征HV聚合物绝缘的介电损耗，并且还提出了诊断以评估聚乙烯的水树老化。在新的和老化的微型聚乙烯（PE）电缆样品上获得的结果表明：（i）去极化损耗强烈依赖于偏振时间和温度和（ii）偏振和去极化损失显示与水树的线性依赖性聚乙烯降解。
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