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The present work studies the space charge accumulation and decay in the degassed cross-linked polyethylene (XLPE) by detrapping mechanism and quantum chemical method. Experimentally, significant positive charge packets were observed at room temperature (300 K). Negative charges accumulated strikingly under high temperatures but with a fast decay during depolarization. The estimated bipolar carrier...
HVDC cables play a vital role in the power transmission system for renewable energy and global power trade. Nowadays, the crosslinked polyethylene (XLPE) extruded cables have been widely applied in power industry due to the superior performance on the thermo-mechanical properties and dielectric properties. The low volume conductivity and the minimized space charge accumulation are the two key requirements...
The study of the charge carrier transport in Ta and NbO capacitors was performed to analyze the leakage current kinetics at high temperature and high electric field for MnO2 and Conducting Polymer (CP) cathode. Leakage current of Ta and NbO capacitors at the room temperature is driven by the Ohmic and Poole-Frenkel mechanism at the rated voltage. It was found that these capacitors are very stable...
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