交联聚乙烯电力电缆绝缘中空间电荷积累与直流电流的温度依赖性

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319) Pub Date : 1999-10-17 DOI:10.1109/CEIDP.1999.804594

F. N. Lim, R. Fleming

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引用次数: 9

摘要

采用6mm厚XLPE绝缘的圆柱形XLPE电力电缆样品，在50kv直流条件下从30/spl℃加热到90/spl℃。在每个温度下，通过XLPE的电流和空间电荷的积累在几个小时内被记录下来。随着温度的升高，平衡空间电荷和电流密度迅速增加。在电极处的电子注入/萃取和永久偶极分子在XLPE体中的空间非均匀分布表明。

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The temperature dependence of space charge accumulation and DC current in XLPE power cable insulation

A cylindrical XLPE power cable sample with 6 mm thick XLPE insulation was heated in stages from 30/spl deg/C to 90/spl deg/C with 50 kV DC applied. At each temperature the current through the XLPE and the accumulation of space charge within it were recorded over several hours. The equilibrium space charge and current densities increased rapidly with increasing temperature. Electron injection/extraction at the electrodes and a spatially-inhomogeneous distribution of permanent dipolar molecules in the XLPE bulk are indicated.

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来源期刊

1999 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.99CH36319)

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