一种特高频局部放电传感器现场校验装置

A Field Calibration Device for UHF Partial Discharge Sensor

传感器校验是特高频局部放电在线监测技术的核心内容。本文依据电力设备局部放电特高频信号特征,研制一种用于现场传感器校验的装置。在实验室对装置输出脉冲参数进行了测试,并将其用于实际工程的应用。结果表明,研发装置输出脉冲幅值在1-50V,脉冲上升沿小于1ns,波形幅值误差小于10%;装置输出信号与典型放电缺陷模型激发信号具有等效性,信号强度误差小于1%,满足工程实际应用的需要。

Switch cabinet is the core equipment of distribution network system. Latent defects are an important cause of insulation accidents of switchgear. Partial discharge detection is an important means of early warning sudden insulation failure of equipment.According to the characteristics of partial discharge in switchgear, this paper analyzes the application characteristics of TEV, ultrasonic and UHF detection technologies, and summarizes the research status of the three technologies. Finally, the combined acoustic and electrical detection method based on the synthesis of the three methods is introduced, and the future research direction of the technology is prospected.