基于特高频局部放电检测的充油电缆终端故障分析

Analysis of Oil-Filled Cable Terminal Fault Based on UHF Partial Discharge Detection

局部放电检测技术作为气体绝缘全封闭开关设备(GIS)状态检测的重要手段之一,在电力运行系统中得到了广泛应用。目前现有的局部放电检测技术对于具有较强间歇性的局部放电信号难以捕捉,并且无法直接观测到局部放电信号的发展趋势,这对之后的信号处理增加了难度。利用局部放电在线监测技术对实际局部放电信号进行追踪分析,最后进行信号定位和消缺,可避免电缆运行事故的发生。

As one of the important means of state detection of gas insulated switchgear(GIS),partial discharge(PD)detection technology has been widely used in power operation system.At present,the existing PD detection technology is difficult to capture the PD signals with strong intermittent,and can not directly observe the development trend of the PD signal,which increases the difficulty of signal processing.The on-line monitoring technology of partial discharge is used to track and analyze the actual PD signals,and the signals are located and eliminated at the last to avoid the cable operation accident.