换流变压器直流局放超宽频带检测数据处理需求分析  

Demand Analysis of Ultra-wideband Detection Data Processing for DC Partial Discharge of Converter Transformer

作　　者：司文荣[1] 傅晨钊[1] 刘家妤[1] 倪鹤立 徐琴[1] SI Wenrong;FU Chenzhao;LIU Jiayu;NI Heli;XU Qin(East China Electric Power Test and Research Institute Co.,Ltd.,Shanghai 200437,China)

机构地区：[1]华东电力试验研究院有限公司,上海200437

出　　处：《电力与能源》2022年第1期18-25,共8页Power & Energy

基　　金：上海市学术/技术带头人项目(No.20XD1430200)

摘　　要：由于换流变压器直流试验无法用交流试验替代,为换流变压器尤其是阀侧绕组的零缺陷投运带来了不确定因素。分析了现行国家和电力行业标准规定的换流变压器直流耐压局部放电(PD)试验程序,以及与超宽频带检测用脉冲群快速智能聚类和分离技术的融合技术方案,包含剔除噪声源后与加压幅值相关的PD源放电幅值、频次等数据处理和显示技术,在满足工程应用的同时可方便试验操作人员对试验过程数据进行把控和判断,并考虑后期耐压数据追溯和对比分析的需求。The DC test of converter transformer can not be replaced by AC test,resulting in the uncertainties for the zero-defect operation of converter transformer,especially the valve-side winding.This paper mainly studies the DC withstand voltage PD test procedure of converter transformer specified in the current national and power industry standards in China,and the fusion technical scheme with pulse sequence fast intelligent clustering and separation technology for ultra-wideband(UWB)detection,including data processing and display technologies such as discharge amplitude and frequency of PD source related to pressurization amplitude after eliminating noise source.While meeting the engineering application,it is convenient for the test operators to control and judge the test process data,and consider the needs of future withstand voltage data tracing and comparative analysis.

关 键 词：换流变压器 直流耐压试验 局部放电 超宽频带 数据处理 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM855