基于脉冲电声法的同轴塑料电缆空间电荷测量技术的研究进展  

Development of Space Charge Measurement Technologies for Coaxial Plastic Cables Based on Pulse Electric-acoustic

作　　者：王霞[1] 熊锦州 陈驰[1] 吴锴[1] 傅明利 侯帅 

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),西安710049 [2]南方电网科学研究院,广州510080

出　　处：《南方电网技术》2015年第10期31-36,共6页Southern Power System Technology

基　　金：国家自然科学基金资助项目(51377131)~~

摘　　要：空间电荷现象严重制约着高压直流塑料电缆的发展。目前,脉冲电声法(pulse electric-acoustic,PEA)是国际上常用的测量固体电介质中空间电荷分布的非破坏性的方法之一。首先从高压脉冲的注入方式出发,简述了几种基于PEA法的同轴塑料电缆空间电荷测量技术;同时,提出了一种基于高压脉冲从测量电极注入电缆试样的改进测量装置,在该装置中通过蓄电池、环氧底座以及光电转换器等将采集数据的示波器进行对地隔离,从而提高了测量系统测量信号的频带宽度;然后,介绍了同轴塑料电缆空间电荷波形的恢复方法;最后,概述了空间电荷测量技术在评估电力电缆老化程度中的应用和未来在线测量空间电荷的可行性及发展方向。Space charge phenomena seriously restrict the development of high voltage direct current plastic cables. At present,pulse electric-acoustic（ PEA） method is one of the common non-destructive methods for measurement of space charge distribution in solid dielectrics in the world. Several space charge measurement technologies based on PEA for coaxial plastic cables are reviewed in consideration of the high voltage pulse injection modes. An improved space charge measurement device based on a high voltage pulse injecting into cables sample from the measuring electrode is also proposed,in which,to improve the bandwidth of the system measurement signal,the oscilloscope for data collection is insulated against ground through storage battery,epoxy base,and photoelectric converter,etc. Furthermore,the wave recovery method of space charge for coaxial plastic cable is introduced. Finally,the space charge measurement technology applied to evaluating the aging degree of power cable and the feasibility of space charge measurement on online in the future are summarized.

关 键 词：脉冲电声法(PEA) 空间电荷 同轴电缆 测量技术 波形恢复 

分 类 号：TM21[一般工业技术—材料科学与工程] TM835.4[电气工程—电工理论与新技术]