高电压技术2011，Vol.37Issue(8)：1997-2003,7.
高压交联聚乙烯电缆局部放电脉冲的时频特性识别方法
Time-frequency Characteristic Based Partial Discharge Pulses Identification Technique for the High Voltage XLPE Power Cables
摘要
Abstract
The equivalent bandwidth-the equivalent time length （∫eq-teq） separation technique is studied theoretically, which is used to identify the partial discharge {PD} pulses in virtue of the pulse clusters in the two-dimension- al Cartesian coordinate system. Moreover, the similar parameters, which are necessary for the PD pulses to make a compact cluster in foq-to~ plane, are calculated. Defective XLPE samples are used to model the different partial dis- charges of cables such as air gas discharge, corona discharge and surface discharge, and the PD pulses are mapped in ∫eq-teq plane. Morover, PD pulses coming from the same defect but different places of XLPE cable are mapped in an- other ∫eq-teq plane. The results show that pulses coming from different defects can form different clusters in feq-teq plane. Similarly, pulses from the same defect but different places can form different clusters in ∫eq-teq plane, also. Accordingly, ∫eq-teq identification technique is efficient for analyzing the defect types and PD sources of high voltage XLPE cables.＂关键词
局部放电（PD）/电力电缆/等效带宽/等效时间长度/局放信号识别/状态评估Key words
partial discharge/power cables/equivalent bandwidth/equivalent time length/PD signal identification/condition assessment分类
信息技术与安全科学引用本文复制引用
张周胜,马爱清,盛戈皞..高压交联聚乙烯电缆局部放电脉冲的时频特性识别方法[J].高电压技术,2011,37(8):1997-2003,7.基金项目
上海市教育委员会重点学科建设项目 （）
上海市科委科技攻关项目（10dzl203000）. （）
