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用 PWP法与 TSD法对交联聚乙烯中的空间电荷形成和演变过程进行了测量 ,两次 TSD的测量结果有很大的不同 ,而在 PWP法的测量结果中这种差别却并不明显 ,说明这两种方法的联合应用能更深入完全地反映空间电荷的实际情况 .交联聚乙烯中空间电荷的形成包括注入电荷、杂质离子和小分子偶极子的转向 ,其中以小分子偶极子的转向为主 ,陷阱对电子的捕获能大幅度改变 TSD电流信号的幅度 ,这些陷阱与交联聚乙烯中的小分子有关 .
The formation and evolution of space charge in crosslinked polyethylene were measured by the PWP and TSD methods. The results of the two TSD measurements were quite different, but not significantly different in the PWP method , Indicating that the combined application of these two methods can more deeply and completely reflect the actual situation of space charge.The formation of space charge in cross-linked polyethylene includes the injection of charges, impurity ions and small molecule dipoles, in which the small molecule even Pole-based steering, trap trapping of electrons can drastically change the magnitude of the TSD current signal, which traps are associated with small molecules in the cross-linked polyethylene.