Article(id=1198662253399601352, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1198662245069713420, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2023.01.013, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1657296000000, receivedDateStr=2022-07-09, revisedDate=1661097600000, revisedDateStr=2022-08-22, acceptedDate=null, acceptedDateStr=null, onlineDate=1763712951278, onlineDateStr=2025-11-21, pubDate=1674144000000, pubDateStr=2023-01-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763712951278, onlineIssueDateStr=2025-11-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763712951278, creator=13701087609, updateTime=1763712951278, updator=13701087609, issue=Issue{id=1198662245069713420, tenantId=1146029695717560320, journalId=1149653034449285133, year='2023', volume='56', issue='1', pageStart='1', pageEnd='114', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763712949292, creator=13701087609, updateTime=1766563309216, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1210617521154159057, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1198662245069713420, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1210617521154159058, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1198662245069713420, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=82, endPage=89, ext={EN=ArticleExt(id=1198662253844197601, articleId=1198662253399601352, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Strain detection method and strain characteristics under low temperature for dry-type air-core reactor, columnId=1192878364340924664, journalTitle=Insulating Materials, columnName=Test and Analysis, runingTitle=null, highlight=null, articleAbstract=
To research the strain characteristic and its measurement method of encapsulation insulation for dry-type air-core reactor, the methods of making test model, embedding sensor and strain gauge, and calculating strain were studied. A test model was made and a test system was built, and the internal strain of encapsulation was studied during the process of reducing temperature and applying current at different low temperatures. The results show that the circumferential thermal expansion coefficient of the encapsulation insulation is less than the axial thermal expansion coefficient and there is anisotropy, which makes the circumferential strain larger than the axial strain. During the process of reducing temperature, negative strain is produced by circumferential shrinkage of the encapsulation insulation, which decreases gradually with the temperature decreasing, the decline rate gradually slows down in the same cabin temperature, and the value increases significantly with the increase of temperature decline amplitude in different cabin temperatures. The axial strain is positive when the cabin temperature is higher, which gradually changes to a negative value with the temperature decreasing, and the change law also changes from gradually increasing to gradually decreasing with the temperature decreasing. During the process of reducing temperature, the circumferential and axial strains have negative jumps many times, resulting in shrinkage micro-cracks. The strain change during process of applying current is contrast to the process of reducing temperature, with the increase of temperature, the circumferential strain increases gradually, the axial strain decreases rapidly, and neither strain jumps. By calculating the maximum thermal stress, it is further verified that the circumferential compression stress is larger than the compression strength of the epoxy glass fiber, resulting in the damage of encapsulated insulation.
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为了研究干式空心电抗器包封绝缘应变测试方法及应变特性,本文针对试验模型制作方法、传感器和应变片预埋方法及应变计算方法开展研究,制作试验模型并搭建试验系统,在不同低温环境下对降温和通流过程包封内部应变开展试验研究。结果表明:包封绝缘周向热膨胀系数小于轴向热膨胀系数,存在各向异性,使周向应变大于轴向应变;降温过程包封绝缘周向收缩产生负应变,应变随温度降低逐渐下降,同一舱温的下降速度逐渐变缓,不同舱温随温度降幅增加数值明显增大;舱温较高时轴向应变为正值,随温度降低逐渐转变成负值,轴向应变变化规律从随温度降低逐渐上升转化为逐渐下降;降温过程中周向和轴向应变均多次发生负跳变,出现收缩微裂纹。通流过程应变与降温过程相反,随温度升高,周向应变逐渐上升,轴向应变快速下降,两种应变均不发生跳变。通过计算最大热应力,进一步验证周向压缩应力大于环氧玻璃丝的抗压强度,造成包封绝缘破坏。
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赵春明(1982-),男(汉族),黑龙江佳木斯人,高级工程师,主要从事电气设备状态评价及故障诊断、物资质量检测技术的研究。
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1State Grid Jilin Electric Power Research Institute, Changchun 130021, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1210916723641946607, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, authorId=1210916723444814307, language=CN, stringName=赵春明, firstName=春明, middleName=null, lastName=赵, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1国网吉林省电力有限公司电力科学研究院,吉林 长春 130021, bio={"content":"
赵春明(1982-),男(汉族),黑龙江佳木斯人,高级工程师,主要从事电气设备状态评价及故障诊断、物资质量检测技术的研究。
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赵春明(1982-),男(汉族),黑龙江佳木斯人,高级工程师,主要从事电气设备状态评价及故障诊断、物资质量检测技术的研究。
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2哈尔滨理工大学 电气与电子工程学院,黑龙江 哈尔滨 150080, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1210916723314790876, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, xref=2, ext=[AuthorCompanyExt(id=1210916723318985184, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, companyId=1210916723314790876, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1国网吉林省电力有限公司电力科学研究院,吉林 长春 130021)]), AuthorCompany(id=1210916723314790876, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, xref=2, ext=[AuthorCompanyExt(id=1210916723318985184, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, companyId=1210916723314790876, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2哈尔滨理工大学 电气与电子工程学院,黑龙江 哈尔滨 150080)])], figs=[ArticleFig(id=1210916727408431801, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.1, caption=
The internal structure of encapsulate, figureFileSmall=HMJ+ndhYj78C+sjtkh1JMQ==, figureFileBig=xnnNSIIMrjxnp9imKc5VUQ==, tableContent=null), ArticleFig(id=1210916727513289407, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图1, caption=
包封内部结构, figureFileSmall=HMJ+ndhYj78C+sjtkh1JMQ==, figureFileBig=xnnNSIIMrjxnp9imKc5VUQ==, tableContent=null), ArticleFig(id=1210916727622341314, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.2, caption=
Temperature sensor and strain gauge embedding method, figureFileSmall=vyrzblfqmH3bZ6RMPBCYXw==, figureFileBig=GnY/v42Oj+xPtIqG5Qr7Lw==, tableContent=null), ArticleFig(id=1210916727710421701, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图2, caption=
温度传感器与应变片预埋方式, figureFileSmall=vyrzblfqmH3bZ6RMPBCYXw==, figureFileBig=GnY/v42Oj+xPtIqG5Qr7Lw==, tableContent=null), ArticleFig(id=1210916727806890698, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.3, caption=
Insulation model of encapsulation, figureFileSmall=8AgklNCWQ70W4vg1NkBGyw==, figureFileBig=9HfIBIHyQsyHsO+zV9/cmA==, tableContent=null), ArticleFig(id=1210916727894971089, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图3, caption=
包封绝缘模型, figureFileSmall=8AgklNCWQ70W4vg1NkBGyw==, figureFileBig=9HfIBIHyQsyHsO+zV9/cmA==, tableContent=null), ArticleFig(id=1210916727991440087, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.4, caption=
Composition of test equipment, figureFileSmall=99pFddZqjm+CYFjzo8RHWg==, figureFileBig=2oMzZ6rqmkSF5k4Ekp8fwQ==, tableContent=null), ArticleFig(id=1210916728054354647, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图4, caption=
试验设备构成, figureFileSmall=99pFddZqjm+CYFjzo8RHWg==, figureFileBig=2oMzZ6rqmkSF5k4Ekp8fwQ==, tableContent=null), ArticleFig(id=1210916728134046429, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.5, caption=
Strain-temperature characteristics of encapsulated insulation model, figureFileSmall=5xxxRCzJF0CnF78H+oF3Zg==, figureFileBig=1mDKmUEWLCn3ZwjKgpBG8Q==, tableContent=null), ArticleFig(id=1210916728230515430, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图5, caption=
包封绝缘模型应变-温度特性, figureFileSmall=5xxxRCzJF0CnF78H+oF3Zg==, figureFileBig=1mDKmUEWLCn3ZwjKgpBG8Q==, tableContent=null), ArticleFig(id=1210916728322790126, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.6, caption=
Strain sensor and temperature sensor pasted on the outer surface of test model, figureFileSmall=kLEpPF5iJxVlmBYn4z5wIw==, figureFileBig=KBuJ+cAZo3E8Q/zRuM+qQw==, tableContent=null), ArticleFig(id=1210916728398287602, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图6, caption=
试验模型外表面粘贴应变片和温度传感器, figureFileSmall=kLEpPF5iJxVlmBYn4z5wIw==, figureFileBig=KBuJ+cAZo3E8Q/zRuM+qQw==, tableContent=null), ArticleFig(id=1210916728498950904, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.7, caption=
Contrastive test results, figureFileSmall=uEtF6T9rpHSq80cj0/Uryg==, figureFileBig=r/Ry12NQLSSQo8BF82pFIA==, tableContent=null), ArticleFig(id=1210916728595419900, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图7, caption=
对比试验结果, figureFileSmall=uEtF6T9rpHSq80cj0/Uryg==, figureFileBig=r/Ry12NQLSSQo8BF82pFIA==, tableContent=null), ArticleFig(id=1210916728691888896, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.8, caption=
Temperature change during cooling and applying current, figureFileSmall=+qGNtpxbAhlxFe915FzjtQ==, figureFileBig=zK2R3oSSdvGNU4sAbVCoMA==, tableContent=null), ArticleFig(id=1210916728775774984, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图8, caption=
降温与通流过程温度变化, figureFileSmall=+qGNtpxbAhlxFe915FzjtQ==, figureFileBig=zK2R3oSSdvGNU4sAbVCoMA==, tableContent=null), ArticleFig(id=1210916728847078155, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.9, caption=
Strain-temperature characteristics of cooling process, figureFileSmall=A0gRBE2nyrz3ntlELhh7Dw==, figureFileBig=IzmqxT4mXQ+22P8WonLTzw==, tableContent=null), ArticleFig(id=1210916728918381326, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图9, caption=
降温过程应变-温度特性, figureFileSmall=A0gRBE2nyrz3ntlELhh7Dw==, figureFileBig=IzmqxT4mXQ+22P8WonLTzw==, tableContent=null), ArticleFig(id=1210916729023238934, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Fig.10, caption=
Strain-temperature characteristics during applying current, figureFileSmall=8vDz2Yd8mMH5ZnuKIsxTUQ==, figureFileBig=ZVPjQ5gR0CzquOg7HKC7Vg==, tableContent=null), ArticleFig(id=1210916729132290843, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=图10, caption=
通流过程应变-温度特性, figureFileSmall=8vDz2Yd8mMH5ZnuKIsxTUQ==, figureFileBig=ZVPjQ5gR0CzquOg7HKC7Vg==, tableContent=null), ArticleFig(id=1210916729211982622, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Tab.1, caption=
Main technical parameters of test model, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 参数 | 项目 | 参数 |
|---|
| 包封内径/mm | 910 | 内外绝缘厚度/mm | 3 |
| 包封外径/mm | 950 | 平均匝数 | 78 |
| 包封高度/mm | 1 000 | 各层线圈直流电阻/Ω | 0.23 |
| 整体高度/mm | 1 306 | 各层线圈电感/mH | 3.87 |
| 质量/kg | 75 | 额定电流/A | 200 |
| 10V电压温升/K | 49 | 层间工频耐压/(kV/mm) | 3 |
), ArticleFig(id=1210916729308451619, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=表1, caption=
试验模型的主要技术参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 参数 | 项目 | 参数 |
|---|
| 包封内径/mm | 910 | 内外绝缘厚度/mm | 3 |
| 包封外径/mm | 950 | 平均匝数 | 78 |
| 包封高度/mm | 1 000 | 各层线圈直流电阻/Ω | 0.23 |
| 整体高度/mm | 1 306 | 各层线圈电感/mH | 3.87 |
| 质量/kg | 75 | 额定电流/A | 200 |
| 10V电压温升/K | 49 | 层间工频耐压/(kV/mm) | 3 |
), ArticleFig(id=1210916729409114919, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Tab.2, caption=
Linear expansion coefficient of glass fiber and epoxy resin insulation, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 | 型号 | 线膨胀系数/(×10-6℃-1) |
|---|
| 无碱玻璃丝 | E | 5.0 |
| 环氧树脂 | 4 211 | 56.8 |
), ArticleFig(id=1210916729493001002, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=表2, caption=
玻璃丝和环氧树脂绝缘的线膨胀系数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 名称 | 型号 | 线膨胀系数/(×10-6℃-1) |
|---|
| 无碱玻璃丝 | E | 5.0 |
| 环氧树脂 | 4 211 | 56.8 |
), ArticleFig(id=1210916729602052910, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Tab.3, caption=
Properties of epoxy glass fiber material, figureFileSmall=null, figureFileBig=null, tableContent=
| 方向 | 弹性模量/GPa | 泊松比 | 拉伸强度/MPa | 抗压强度/MPa |
|---|
| 周向 | 45 | 0.270 | 1 370 | 42 |
| 轴向 | 14 | 0.091 | 23 | 110 |
), ArticleFig(id=1210916729702716208, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=表3, caption=
环氧玻璃丝的材料特性
, figureFileSmall=null, figureFileBig=null, tableContent=
| 方向 | 弹性模量/GPa | 泊松比 | 拉伸强度/MPa | 抗压强度/MPa |
|---|
| 周向 | 45 | 0.270 | 1 370 | 42 |
| 轴向 | 14 | 0.091 | 23 | 110 |
), ArticleFig(id=1210916729782407987, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=EN, label=Tab.4, caption=
Maximum thermal stress during cooling and applying current under different cabin temperatures, figureFileSmall=null, figureFileBig=null, tableContent=
| 舱温/℃ | 轴向应力/MPa | 周向应力/MPa |
|---|
| 降温 | 通流 | 降温 | 通流 |
|---|
| 0 | 3.2 | -7.1 | -12.5 | 35.8 |
| -10 | 2.3 | -5.6 | -17.8 | 20.7 |
| -20 | 1.9 | -4.9 | -32.6 | 3.9 |
| -30 | 0.2 | -5.0 | -54.8 | -10.5 |
| -40 | -4.4 | -8.0 | -68.3 | -27.7 |
), ArticleFig(id=1210916729853711158, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1198662253399601352, language=CN, label=表4, caption=
不同舱温下降温与通流过程最大热应力
, figureFileSmall=null, figureFileBig=null, tableContent=
| 舱温/℃ | 轴向应力/MPa | 周向应力/MPa |
|---|
| 降温 | 通流 | 降温 | 通流 |
|---|
| 0 | 3.2 | -7.1 | -12.5 | 35.8 |
| -10 | 2.3 | -5.6 | -17.8 | 20.7 |
| -20 | 1.9 | -4.9 | -32.6 | 3.9 |
| -30 | 0.2 | -5.0 | -54.8 | -10.5 |
| -40 | -4.4 | -8.0 | -68.3 | -27.7 |
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