变压器局放用UHF传感器的校准方法研究

Calibration of UHF Sensor for Detection of Partial Discharge in Transformer

笔者试探性对变压器局部放电测试用UHF传感器的检测校准方法开展研究。研制变压器局放UHF传感器的安装工装、可调试人造纳秒脉冲源、变压器局放故障模拟装置、缺陷模拟电极等,在实验室内对UHF传感器的灵敏度进行标定和测试范围进行校准测试。该检测校验方法也可对现场变压器局放UHF传感器安装后的性能开展测试,在实验室内用变压器模拟工装验证了现场UHF传感器测试方法。

An installation kit of the ultra-high-frequency （UHF） sensor for detecting partial discharge （PD） in a transformer, an adjustable artificial nanosecond pulse source, a transformer PD fault simulation device, and some analogue electrodes of defects were designed to calibrate the sensitivity of the UHF sensor and to test the detection range in laboratory. This calibration method can also be used to test the UHF sensor＇s detection performance of PD in a transformer on site after installation, The on-site UHF sensor test method was verified with the transformer simulation tool-kit in laboratory.