CAJ | 학술논문

由于声波在固体介质的传递中会发生衰减和色散，导致了电声脉冲法（PEA）空间电荷测量信号的畸变。在分析PEA空间电荷分布信号基础上，采用高斯函数模拟电极附近的空间电荷分布信号，实现对声波传递过程中的不同频率信号衰减因子的求取，并利用反卷积技术实现对空间电荷分布曲线的恢复。利用该数据处理技术对测量信号进行了恢复，并完成对不同老化时间交联聚乙烯（XLPE）电缆的绝缘层的空间电荷分布状态的测量。由信号可知：通过信号的恢复，XLPE电缆绝缘体中的空间电荷分布更加明显，并随着老化时间的增加，绝缘体中的缺陷增加，其空间电荷也越来越多。由此证实了可以采用空间电荷分布状态实现对绝缘老化状态的评估。
유우성파재고체개질적전체중회발생쇠감화색산，도치료전성맥충법（PEA）공간전하측량신호적기변。재분석PEA공간전하분포신호기출상，채용고사함수모의전겁부근적공간전하분포신호，실현대성파전체과정중적불동빈솔신호쇠감인자적구취，병이용반권적기술실현대공간전하분포곡선적회복。이용해수거처리기술대측량신호진행료회복，병완성대불동노화시간교련취을희（XLPE）전람적절연층적공간전하분포상태적측량。유신호가지：통과신호적회복，XLPE전람절연체중적공간전하분포경가명현，병수착노화시간적증가，절연체중적결함증가，기공간전하야월래월다。유차증실료가이채용공간전하분포상태실현대절연노화상태적평고。
The reduction and dispersion phenomena are existed in the process of acoustic wave transmission, and make the original space charge distribution signal distortion.Base on analyzing the characters of space charge distribution signal,the space charge distribution signal near the two electrodes is simulated by the Gaussian function,and the reduction factors of different frequencies are obtained.After the test signal is modi-fied by the reduction factors,the original space charge distribution signal is obtained by the deconvolution tech-nology.The space charge distribution signals of different ageing high voltage cables is recovered by this tech-nology,it can be see that the space charge distribution in the insulation become clearer than that of before.The defects in the insulation become more and more with ageing time increasing,the space charge become more and more.Thus it can be seen that the space charge distribution measurement is a good method to judge the insula-tion ageing status.