变压器铁芯接地电流在线监测系统设计及其带电检测不确定度评定包玉树，胡永建，吕佳，孙雄，黄亚龙(江苏方天电力技术有限公司，南京211102)摘要:在保持变压器铁芯接地电流在线监测系统硬件设施不变的前提下，研究了一种该系统的算法升级策略。使用多测点多列交叉神经网络支持的机器学习对该系统的接地电流进行测量，同时研究一种基于6倍标准误差率的检测不确定度标识方法，研究该系统算法升级策略的同时，分析不确定度的标识方法。技术革新后的变压器铁芯接地电流监测误差小于±0．395%，可以满足对变压器铁芯接地电流的测量需求。且该算法可以排除实际测量中因为变压器内外部复合故障导致的接地电流产生机理差异性影响。同时，重点研究了对铁芯接地电流误差测量中的扩展不确定度测量方法确认问题，实验数据验证了6倍标准偏差率作为扩展不确定度测量标度，可以满足该系统的测量误差标定需求。关键词:铁芯接地电流;在线监测;算法升级;不确定度;标准偏差率DOI:10．19753/j．issn1001-1390．2023．04．022中图分类号:TM307文献标识码:B文章编号:1001-1390(2023)04-0150-05Designofon-linemonitoringsystemforgroundingcurrentoftransformercoreandevaluationofuncertaintyinlivedetectionBaoYushu，HuYongjian，LvJia，SunXiong，HuangYalong(JiangsuFangtianElectricPowerTechnologyCo．，Ltd．，Nanjing211102，China)Abstract:Onthepremiseofkeepingthehardwarefacilitiesoftransformercoregroundingcurrentonlinemonitoringsystemunchanged，analgorithmupgradingstrategyofthesystemisstudiedinthispaper．Thegroundingcurrentofthesystemismeasuredbyusingthemachinelearningsystemsupportedbymulti-measuringpointsandmulti-columncrossneuralnet-workformed．Meanwhile，amethodofuncertaintyidentificationbasedon6timesstandarderrorrateisstudied．Theiden-tificationmethodofuncertaintyisanalyzedwhilestudyingthealgorithmupgradestrategyofthesystem．Afterthetechnicalinnovation，themonitoringerroroftransformercoregroundingcurrentislessthansystemunchanged，analgorithmupgra-dingstrategyofthesystemisstudiedrmercoregroundingcurrent．Moreover，thealgorithmcaneliminatethedifferenceofgroundingcurrentmechanismcausedbyinternalandexternalcompositefaultsoftransformer．Meanwhile，thispaperfocu-sesontheconfirmatio...
