Abstract：The nanocomposite is produced by adding different concentrations of nano-MgO, whose particle size is 70nm, to cross linked polyethylene (XLPE). The high field conduction and space charge distribution of samples are studied with a jointing measuring apparatus of dc conduction and space charge. It is found that the conduction mechanism of XLPE and the composites of nano-MgO/XLPE are not dominant by space charge limited current (SCLC) at the room temperature. At the same time, space charge injection threshold of the samples was calculated. It is shown that the addition of nano-MgO could increase the threshold 30.69% higher than that of pure XLPE. Moreover, it is found that the dc conduction of nano-MgO/XLPE decreases firstly and then increases with the increment of nano-MgO content as dc electrical stress is below the injection threshold. Space charge distribution in all samples is investigated and it is found that nano-MgO could well decrease the hetero-charge accumulation and inhibit electron injection in XLPE.
郑煜, 吴建东, 王俏华, 王雅群, 尹毅. 空间电荷与直流电导联合测试技术用于纳米MgO抑制XLPE中空间电荷的研究[J]. 电工技术学报, 2012, 27(5): 126-131.
Zheng Yu, Wu Jiandong, Wang Qiaohua, Wang Yaqun, Yin Yi. Research on the Space Charge Suppressing Mechanism of Nano-MgO in XLPE with a Joint Measuring Technology of DC Conduction and Space Charge. Transactions of China Electrotechnical Society, 2012, 27(5): 126-131.
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