用于电力电缆局部放电检测的频率可调振荡波电路研究

Research on Frequency Adjustable Oscillating Wave Circuit for Partial Discharge Detection of Power Cable

交联聚乙烯电缆以其优越的电气性能和耐热性能而被普遍使用,这种电缆的使用寿命很大程度上取决于其绝缘介质的树枝状老化,而对局部放电的测量是定量分析树枝状劣化程度的有效方法。现场对电缆进行离线检测需满足非破坏性和广泛性要求,因此研究了一种用于电力电缆局部放电检测的频率可调指数衰减振荡波的试验电路。

At present,XLPE cables are widely used because of their superior electrical properties and heat resistance.The service life of this cable depends largely on the dendritic aging of its insulating medium,and the measurement of partial discharge is quantitative analysis of dendritic effective method of deterioration.The on-site off-line detection of cables needs to meet the non-destructive and extensive requirements.Therefore,a test circuit with adjustable frequency exponential attenuated oscillating waves for partial discharge testing of power cables is studied.