Article(id=1209927354089083319, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209927347319468160, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2022.04.017, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1622649600000, receivedDateStr=2021-06-03, revisedDate=1627401600000, revisedDateStr=2021-07-28, acceptedDate=null, acceptedDateStr=null, onlineDate=1766398760578, onlineDateStr=2025-12-22, pubDate=1650384000000, pubDateStr=2022-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766398760578, onlineIssueDateStr=2025-12-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766398760578, creator=13701087609, updateTime=1766398760578, updator=13701087609, issue=Issue{id=1209927347319468160, tenantId=1146029695717560320, journalId=1149653034449285133, year='2022', volume='55', issue='4', pageStart='1', pageEnd='120', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766398758964, creator=13701087609, updateTime=1766563041616, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1210616398758408595, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209927347319468160, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1210616398758408596, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209927347319468160, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=114, endPage=120, ext={EN=ArticleExt(id=1209927354386878922, articleId=1209927354089083319, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Detection of Micro-water Content in Transformer Oil Based on Multi Frequency Ultrasonic and Artificial Neural Network, columnId=1192878364340924664, journalTitle=Insulating Materials, columnName=Test and Analysis, runingTitle=null, highlight=null, articleAbstract=
The micro-water content in transformer oil is an important factor to measure whether the transformer can operate stably for a long time. Based on multi-frequency ultrasonic detection combined with artificial neural network algorithm, a method for predicting micro-water content in transformer oil was proposed in this study. Firstly, the micro-water content in 210 groups of oils was determined by Carl Fischer titration. Secondly, 210 groups of oil samples were detected by multi-frequency ultrasound to analyze the relationship between micro-water content in oil samples and amplitude and phase signals in multi-frequency ultrasonic data. Finally, the original 242-dimensional multi-frequency ultrasonic data was reduced to 23-dimensional by PCA. Two prediction models for micro-water content in transformer oil based on PCA-GA-BPNN and PCA-PSO-GRNN were established by combining with BPNN and GRNN artificial neural networks as well as GA and PSO optimization algorithms. The prediction results were compared with the actual results. The results show that the forecast accuracy of both models is higher than 90%, which indicates that the method proposed in this study can effectively detect the moisture content in transformer oil.
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变压器油中的微水含量是衡量变压器能否长期稳定运行的重要因素。本研究基于多频超声检测结合人工神经网络算法,提出一种变压器油中微水含量预测方法。首先,利用卡尔费休滴定法测定210组油样中的微水含量。其次,对210组油样进行多频超声检测,分析油样中微水含量与多频超声数据中振幅和相位信号的关系。最后,利用PCA将原始242维多频超声数据降为23维,结合BPNN和GRNN两种人工神经网络以及GA和PSO两种优化算法,建立了基于PCA-GA-BPNN和PCA-PSO-GRNN的两种变压器油中微水含量预测模型,并将预测结果与实际结果进行对比。结果表明:两种预测模型的预测准确率均超过90%,表明本研究提出的方法能够有效地检测变压器油中的微水含量。
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周渠(1983-),男(汉族),四川渠县人,教授,主要从事电力设备绝缘在线智能监测与故障诊断方面的研究。
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杨华昆(1992-),男(汉族),云南保山人,助理工程师,主要从事电气检测方面的研究。
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杨华昆(1992-),男(汉族),云南保山人,助理工程师,主要从事电气检测方面的研究。
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3College of Engineering and Technology, Southwest University, Chongqing 400715, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1210892028053950754, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, authorId=1210892027877789978, language=CN, stringName=周渠, firstName=渠, middleName=null, lastName=周, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Multi frequency ultrasonic amplitude response of oil samples with different moisture content, figureFileSmall=KpbAHur4Rm2R1bgnLSDIRg==, figureFileBig=/1vAqIu/XkmfH5yl4yn2yw==, tableContent=null), ArticleFig(id=1210892030281126259, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=图3, caption=
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Multi frequency ultrasonic phase response of oil samples with different water content, figureFileSmall=27i+H/Hs2lc5MYUWJUK+MA==, figureFileBig=/kOIV7TiW8h83XTpOzkUsg==, tableContent=null), ArticleFig(id=1210892030528590203, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=图4, caption=
不同微水含量油样的多频超声相位响应, figureFileSmall=27i+H/Hs2lc5MYUWJUK+MA==, figureFileBig=/kOIV7TiW8h83XTpOzkUsg==, tableContent=null), ArticleFig(id=1210892030729916798, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Fig.5, caption=
BPNN training process and GA basic process, figureFileSmall=VppyzNcgqQP4CxEIxNtsJg==, figureFileBig=THZbNXbV3/i5+Di9ZPZFkw==, tableContent=null), ArticleFig(id=1210892030914466179, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=图5, caption=
BPNN的训练过程和GA基本流程, figureFileSmall=VppyzNcgqQP4CxEIxNtsJg==, figureFileBig=THZbNXbV3/i5+Di9ZPZFkw==, tableContent=null), ArticleFig(id=1210892031052878218, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Fig.6, caption=
Flow chart of GRNN optimized by PSO, figureFileSmall=48qhp5NoKqre2rIoLu9w9w==, figureFileBig=lOjbL20EyHF+JeSBwLVjOA==, tableContent=null), ArticleFig(id=1210892031161930124, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=图6, caption=
PSO优化GRNN流程图, figureFileSmall=48qhp5NoKqre2rIoLu9w9w==, figureFileBig=lOjbL20EyHF+JeSBwLVjOA==, tableContent=null), ArticleFig(id=1210892031380033935, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Fig.7, caption=
Prediction accuracy of models under different training oil samples, figureFileSmall=kEriK2OIjB0Ne11JJEID+Q==, figureFileBig=q8Hz+WyBKKmqTRaB/708xw==, tableContent=null), ArticleFig(id=1210892031510057366, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=图7, caption=
不同训练油样下模型的预测精度, figureFileSmall=kEriK2OIjB0Ne11JJEID+Q==, figureFileBig=q8Hz+WyBKKmqTRaB/708xw==, tableContent=null), ArticleFig(id=1210892031627497881, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Fig.8, caption=
The prediction difference of micro water content of two prediction models, figureFileSmall=2fI810/K1fuUyRnBOCr8KQ==, figureFileBig=TB+NsLp+pgYlpo8D1H+5Hg==, tableContent=null), ArticleFig(id=1210892031732355483, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=图8, caption=
两种预测模型的微水含量预测差值, figureFileSmall=2fI810/K1fuUyRnBOCr8KQ==, figureFileBig=TB+NsLp+pgYlpo8D1H+5Hg==, tableContent=null), ArticleFig(id=1210892031841407391, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Tab.1, caption=
The 210 sets of transformer oil samples, figureFileSmall=null, figureFileBig=null, tableContent=
| 电压等级/kV | 投运年限 | 训练集 | 测试集 |
|---|
| 110 | <5 | 26 | 1 |
| 5~10 | 36 | 1 |
| >10 | 15 | 1 |
| 220 | <5 | 31 | 1 |
| 55~10 | 37 | 2 |
| >10 | 18 | 1 |
| 500 | <5 | 12 | 1 |
| 5~10 | 15 | 1 |
| >10 | 10 | 1 |
), ArticleFig(id=1210892031963042208, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=表1, caption=
210组变压器油样本
, figureFileSmall=null, figureFileBig=null, tableContent=
| 电压等级/kV | 投运年限 | 训练集 | 测试集 |
|---|
| 110 | <5 | 26 | 1 |
| 5~10 | 36 | 1 |
| >10 | 15 | 1 |
| 220 | <5 | 31 | 1 |
| 55~10 | 37 | 2 |
| >10 | 18 | 1 |
| 500 | <5 | 12 | 1 |
| 5~10 | 15 | 1 |
| >10 | 10 | 1 |
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Eigenvalue and cumulative variance contribution rate, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | 特征值 | 累计方差贡献率 | 序号 | 特征值 | 累计方差贡献率 |
|---|
| 1 | 91.17 129 669 | 0.376 740 895 | 13 | 1.454 505 459 | 0.961 447 833 |
| 2 | 54.95 147 346 | 0.603 813 115 | 14 | 1.299 503 951 | 0.966 817 684 |
| 3 | 26.23 695 553 | 0.712 230 271 | 15 | 1.234 427 372 | 0.971 918 624 |
| 4 | 17.77 209 151 | 0.785 668 666 | 16 | 1.166 180 272 | 0.976 737 551 |
| 5 | 10.9 965 357 | 0.831 108 896 | 17 | 0.855 418 586 | 0.980 272 338 |
| 6 | 9.162 125 551 | 0.868 968 919 | 18 | 0.759 886 278 | 0.983 412 364 |
| 7 | 6.142 911 954 | 0.894 352 853 | 19 | 0.466 307 196 | 0.985 339 253 |
| 8 | 4.086 777 752 | 0.911 240 364 | 20 | 0.428 298 263 | 0.987 109 081 |
| 9 | 3.310 798 399 | 0.924 921 349 | 21 | 0.353 899 512 | 0.988 571 475 |
| 10 | 2.83 234 4498 | 0.936 625 252 | 22 | 0.305 262 822 | 0.989 832 892 |
| 11 | 2.422 565 261 | 0.946 635 853 | 23 | 0.301 556 144 | 0.991 078 992 |
| 12 | 2.129 993 871 | 0.955 437 482 | 24 | 0.228 569 001 | 0.992 023 492 |
), ArticleFig(id=1210892032218894758, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=表2, caption=
特征值和累计方差贡献率
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | 特征值 | 累计方差贡献率 | 序号 | 特征值 | 累计方差贡献率 |
|---|
| 1 | 91.17 129 669 | 0.376 740 895 | 13 | 1.454 505 459 | 0.961 447 833 |
| 2 | 54.95 147 346 | 0.603 813 115 | 14 | 1.299 503 951 | 0.966 817 684 |
| 3 | 26.23 695 553 | 0.712 230 271 | 15 | 1.234 427 372 | 0.971 918 624 |
| 4 | 17.77 209 151 | 0.785 668 666 | 16 | 1.166 180 272 | 0.976 737 551 |
| 5 | 10.9 965 357 | 0.831 108 896 | 17 | 0.855 418 586 | 0.980 272 338 |
| 6 | 9.162 125 551 | 0.868 968 919 | 18 | 0.759 886 278 | 0.983 412 364 |
| 7 | 6.142 911 954 | 0.894 352 853 | 19 | 0.466 307 196 | 0.985 339 253 |
| 8 | 4.086 777 752 | 0.911 240 364 | 20 | 0.428 298 263 | 0.987 109 081 |
| 9 | 3.310 798 399 | 0.924 921 349 | 21 | 0.353 899 512 | 0.988 571 475 |
| 10 | 2.83 234 4498 | 0.936 625 252 | 22 | 0.305 262 822 | 0.989 832 892 |
| 11 | 2.422 565 261 | 0.946 635 853 | 23 | 0.301 556 144 | 0.991 078 992 |
| 12 | 2.129 993 871 | 0.955 437 482 | 24 | 0.228 569 001 | 0.992 023 492 |
), ArticleFig(id=1210892032332140971, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Tab.3, caption=
Convergence time of two models, figureFileSmall=null, figureFileBig=null, tableContent=
| 训练样品量/组 | PCA-GA-BPNN收敛时间/s | PCA-PSO-GRNN收敛时间/s |
|---|
| 40 | 12.3 | 13.5 |
| 80 | 35.6 | 38.3 |
| 120 | 70.1 | 69.9 |
| 160 | 105.6 | 103.7 |
| 200 | 112.9 | 135.4 |
), ArticleFig(id=1210892032449581489, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=表3, caption=
两种模型的收敛时间
, figureFileSmall=null, figureFileBig=null, tableContent=
| 训练样品量/组 | PCA-GA-BPNN收敛时间/s | PCA-PSO-GRNN收敛时间/s |
|---|
| 40 | 12.3 | 13.5 |
| 80 | 35.6 | 38.3 |
| 120 | 70.1 | 69.9 |
| 160 | 105.6 | 103.7 |
| 200 | 112.9 | 135.4 |
), ArticleFig(id=1210892032596382136, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Tab.4, caption=
The prediction value of micro water content in two forecasting models, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | 测试值/(mg/L) | PCA-PSO-GRNN预测值/(mg/L) | PCA-GA-BPNN预测值/(mg/L) |
|---|
| 1 | 14.30 | 13.10 | 13.56 |
| 2 | 11.32 | 12.26 | 10.52 |
| 3 | 16.48 | 14.95 | 15.63 |
| 4 | 6.44 | 5.98 | 5.98 |
| 5 | 11.00 | 12.14 | 10.25 |
| 6 | 2.29 | 2.67 | 2.55 |
| 7 | 4.22 | 3.79 | 3.99 |
| 8 | 7.49 | 6.44 | 6.77 |
| 9 | 22.16 | 20.01 | 21.00 |
| 10 | 18.43 | 20.11 | 17.02 |
), ArticleFig(id=1210892032705434043, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=表4, caption=
两种预测模型的微水含量预测值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | 测试值/(mg/L) | PCA-PSO-GRNN预测值/(mg/L) | PCA-GA-BPNN预测值/(mg/L) |
|---|
| 1 | 14.30 | 13.10 | 13.56 |
| 2 | 11.32 | 12.26 | 10.52 |
| 3 | 16.48 | 14.95 | 15.63 |
| 4 | 6.44 | 5.98 | 5.98 |
| 5 | 11.00 | 12.14 | 10.25 |
| 6 | 2.29 | 2.67 | 2.55 |
| 7 | 4.22 | 3.79 | 3.99 |
| 8 | 7.49 | 6.44 | 6.77 |
| 9 | 22.16 | 20.01 | 21.00 |
| 10 | 18.43 | 20.11 | 17.02 |
), ArticleFig(id=1210892032860623298, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=EN, label=Tab.5, caption=
The prediction error of two prediction models, figureFileSmall=null, figureFileBig=null, tableContent=
| 误差项 | PCA-PSO-GRNN预测模型 | PCA-GA-BPNN预测模型 |
|---|
| MAPE | 10.31 | 7.07 |
| RMSE | 0.379 5 | 0.233 9 |
| perr | 0.008 9 | 0.003 9 |
), ArticleFig(id=1210892032982258114, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927354089083319, language=CN, label=表5, caption=
两种预测模型的预测误差
, figureFileSmall=null, figureFileBig=null, tableContent=
| 误差项 | PCA-PSO-GRNN预测模型 | PCA-GA-BPNN预测模型 |
|---|
| MAPE | 10.31 | 7.07 |
| RMSE | 0.379 5 | 0.233 9 |
| perr | 0.008 9 | 0.003 9 |
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