基于UHF信号能量的GIS典型缺陷局放信号标定研究.pdfVIP

基于UHF 信号能量的GIS 典型缺陷局放信号标定 研究 王辉，郭志红，云玉新，李秀卫，袁海燕，郑建 山东电力集团公司电力科学研究院，山东 济南 250002 ； Research of UHF calibration technique for four kinds of partial discharge defects in GIS WANG Hui1, GUO Zhi-hong, YUN Yu-xin, LI Xiu-wei, YUAN Hai-yan, ZHENG Jian Shandong Electric Power Research Institute, Jinan 250002, China . ABSTRACT: Four common defects in GIS are proposed in this GIS 内部运行状况，及时发现潜在绝缘缺陷的一种 paper, and four frequency bands which are the 300~400MHz, 行之有效的方法，通过局放检测还可对内部缺陷进 700~800MHz, 1.4~1.5GHz and 0.3~3GHz, are selected to calibrate the UHF signal of each defect. After that different 行分类和识别，有助于现场对故事 GIS 进行分析 mathematical regression models and the calibration indexes of [1,2] 。 goodness of fit are established for the regression and calibration analysis for the results. After the research, we find that there has 传统的基于IEC 推荐的常规检测法虽然可以直 obvious corresponding relation between the amplitude (mV) 观的给出局部放电所产生的视在放电量(pC)大小， and apparent discharge for the same type defects by different kinds of detection frequency bands. Besides, there has 但受制于检测频带和所需配套检测装置，无法用于 differences between the different bands, and the unary linear 现场局部放电检测。目前广泛用于现场检测的超高 polynomial regression model may be approximately used for 频（UHF ）法，是利用UHF 传感器接收 GIS 内部 calibrate the UHF signal amplitude for different kinds of defects 。 放电所激发的电磁波，虽然可以实现局部放电的检 KEY WORD: partial discharge; GIS; UHF calibration; 测和放电源的定位分析，但其输出UHF 信号波形仅 mathematical regression models; verification for goodness 对