GIS中典型局放缺陷的UHF信号与放电量的相关分析

超高频(UHF)信号与放电量的关系是局部放电UHF检测研究的难点问题,为了解GIS局部放电UHF法的检测结果与脉冲电流法的参量之间的关系,通过4种典型缺陷的局部放电模型的实验研究,比较了UHF信号的能量、二次积分、峰值电压、峰峰值、波面积等参量与放电量及放电量平方之间的联系。研究表明,UHF信号能量与其放电量平方的线性关系均具有最高的可决系数,即UHF信号能量与放电量平方之间存在线性关系;得到了UHF信号能量与其放电量之间的最佳回归曲线。研究结果对用超高频法定量检测电力设备局部放电具有重要的参考价值和指导作用。

Relationship Between UHF Signals and Discharge Magnitude from Typical Partial Discharge Defects in GIS

Relationship between UHF signals and discharge magnitude is a difficult problem in partial discharge UHF detecting.In order to analyze the relationship between the testing results by the UHF method and the parameter by pulse current method,we compared the relationship between quantities and discharge magnitude of the UHF signal energy,quadratic integral,peak voltage,peak-to-peak value,and wave area from four typical defect models of partial discharge.Conclusions can be drawn that the highest coefficient of determination exists in the signal energy of UHF and the square discharge magnitude,while the best regression curve exists in the signal parameter of UHF and the discharge magnitude can be attained as well.The results can be used as references and guides for calibration of the PD UHF signal of the interior of electric device.