局部放电UHF检测系统及其功能校验分析

Partial Discharge UHF Detection System and Its Functional Calibration Analysis

在GIS局部放电状态检测系统中,UHF检测技术得到了广泛的应用,然而受UHF传感器质量和配置方案等问题的影响,导致UHF传感器漏报警和误报警的情况时有发生。基于此,研究分析了影响局部放电UHF检测系统的因素,然后在双通道任意波形发生器AWG7082C设置信号模拟平台的基础上,通过重构任意波形发生器信号场景,以全面校验局放UHF检测仪器模式识别和电磁干扰抑制功能,结果发现仪器对混合干扰信号的抑制效果最差,而影响局放检测准确性的主要原因是混合干扰信号。

UHF detection technology has been widely used in GIS partial discharge state detection system.However,due to the influence of UHF sensor quality,configuration scheme and other problems,the UHF sensor leakage alarm and false alarm sometimes occur.Based on this,this study analyzes the partial discharge UHF detection system of quantitative evaluation index,and then in the double-channel arbitrary waveform generator AWG7082C setting signal based on the simulation platform,through refactoring,arbitrary waveform generator signal to the comprehensive check UHF partial discharge detection instrument electromagnetic interference suppression function,pattern recognition and found that the instrument on the jamming signal suppression effect is the worst,the accuracy and precision of the partial discharge detection and the main reason is mixed jamming signal.