【摘要】 以少量氯化聚乙烯(CPE)改性交联聚乙烯(XLPE)，用电声脉冲法测量了试样中的空间电荷分布，研究了CPE含量与空间电荷的关系，确定了降低空间电荷的最佳含量，研究了CPE对试样直流预压短路树枝起始电压的影响，当CPE含量为1%时，XLPE的50%直流预压短路树枝起始电压决定直流电压的极性，分别可提高42.3%和35.5%。最后作者还测量了试样的其他介电性能，计算了空间电荷畸变的电场强度，分析和讨论了相关的机理。更多还原

【Abstract】 The cross linked polyethylene (XLPE) is modified by a small amount of chlorinated polyethylene(CPE) The space charge distribution in the samples is measured with electro acoustic pulse method The relation of space charge densities with content of CPE is explored and its optimum content f or decreasing space charges is determined The effect of CPE on the initiation v oltage of short circuit treeing after pre stress of dc voltage is studied It i s shown by test result that when the content of CPE is 1%,the 50% treeing initia tion voltages related to the positive polarity and the negative polarity of dc v oltage,are increased by 42.3% and 35.5% respectively Finally,the other dielec tric properties of samples are measured and the electrical stress distributions distorted by space charges in samples are calculated The relative mechanism is discussed更多还原