Article(id=1209926729607549374, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209926723278336734, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2022.03.012, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1620403200000, receivedDateStr=2021-05-08, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1766398611690, onlineDateStr=2025-12-22, pubDate=1647705600000, pubDateStr=2022-03-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766398611690, onlineIssueDateStr=2025-12-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766398611690, creator=13701087609, updateTime=1766398611690, updator=13701087609, issue=Issue{id=1209926723278336734, tenantId=1146029695717560320, journalId=1149653034449285133, year='2022', volume='55', issue='3', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766398610181, creator=13701087609, updateTime=1766563016675, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1210616294165049744, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209926723278336734, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1210616294165049745, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209926723278336734, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=84, endPage=92, ext={EN=ArticleExt(id=1209926729951482320, articleId=1209926729607549374, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Study on Improving Ampacity of Cables Laid in Pipes by Backfilling Low Thermal Resistance Materials, columnId=1190369198472794288, journalTitle=Insulating Materials, columnName=Insulation Technology, runingTitle=null, highlight=null, articleAbstract=
Aiming at the problem that the poor heat dissipation effect of the cable laying in piping leads to the cable line appear ampacity bottleneck, we use the 2×3 piping laying of 110 kV power cable with two loops as research object. The changes of cable ampacity before and after backfilling low thermal resistance materials in the pipes was studied through thermal circuit models and large current tests, and the relationship between the ampacity of cable and the thermal conductivity of backfill material was analyzed based on finite element simulation model. The results show that when two circuits of 110 kV 630 mm2 cables are laid with 2×3 rows of pipes, compared with the case without backfilling in the pipes, the ampacity of cables after the pipes are backfilled with low thermal resistance materials increases by 25.22%. With the continuous increase of thermal conductivity of the backfill material, the ampacity of cable also continues to increase, but the increase rate is slower and slower, and the ampacity of cable tend to be stable eventually. When the thermal conductivity of backfill material increases from 1 W/(m·K) to 7 W/(m·K), the increase rate of cable ampacity is 8.99%. When the thermal conductivity of backfill material increases from 7 W/(m·K) to 13 W/(m·K), the increase rate of cable ampacity is only 2.00%.
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针对排管敷设电缆散热效果差而导致电缆线路载流量瓶颈的问题,以2×3排管敷设2回路110 kV电力电缆为研究对象,通过热路模型和大电流试验分析了管内回填低热阻材料前后电缆载流量的变化情况,并基于有限元仿真模型分析了电缆载流量与回填材料导热系数的关系。结果表明:2×3排管敷设2回路110 kV 630 mm2电缆时,相比于管内无回填的情况,管内回填低热阻材料后电缆载流量可提升25.22%。随着回填材料导热系数的增大,电缆的载流量不断增加,但增加的速度越来越缓慢,电缆载流量最终趋于稳定。当回填材料的导热系数由1 W/(m·K)增至7 W/(m·K)时,电缆载流量的提升率为8.99%;当回填材料的导热系数由 7 W/(m·K)增至13 W/(m·K)时,电缆载流量的提升率仅为2.00%。
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曾含(1997-),男(汉族),江西丰城人,硕士生,研究方向为电缆载流量及热参数。
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李红发(1987-),男(汉族),湖北黄冈人,高级工程师,研究方向为输电电缆运行维护。
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李红发(1987-),男(汉族),湖北黄冈人,高级工程师,研究方向为输电电缆运行维护。
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3School of Electric Power, South China University of Technology, Guangzhou 510000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1210892082038829858, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, authorId=1210892081757811478, language=CN, stringName=曾含, firstName=含, middleName=null, lastName=曾, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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试验电缆升流电路原理图, figureFileSmall=cw1S3iUwHmIlYgNNS1cCHw==, figureFileBig=X1S8U3vyrIFNeJ3HnHI1Cg==, tableContent=null), ArticleFig(id=1210892084073067367, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.2, caption=
Schematic diagram of cable wiring, figureFileSmall=bAsy1kS2nJo3J86ipIlgsA==, figureFileBig=4UbkspeQox9dSzLbCoHFng==, tableContent=null), ArticleFig(id=1210892084173730668, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图2, caption=
电缆接线原理图, figureFileSmall=bAsy1kS2nJo3J86ipIlgsA==, figureFileBig=4UbkspeQox9dSzLbCoHFng==, tableContent=null), ArticleFig(id=1210892084320531310, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.3, caption=
Schematic diagram of the cross-section of test loop pipe, figureFileSmall=ghZDDW9mk90y9ICeoiu29g==, figureFileBig=PGouiah94kU0bYH/leZbPg==, tableContent=null), ArticleFig(id=1210892084450554737, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图3, caption=
试验回路排管截面示意图, figureFileSmall=ghZDDW9mk90y9ICeoiu29g==, figureFileBig=PGouiah94kU0bYH/leZbPg==, tableContent=null), ArticleFig(id=1210892084572189558, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.4, caption=
The physical diagram of test loop pipe, figureFileSmall=P9Tl348Rl2F5/SzhtT8sbg==, figureFileBig=WcJrDBgrU93IX72flqKQDw==, tableContent=null), ArticleFig(id=1210892084744156028, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图4, caption=
试验回路排管实物图, figureFileSmall=P9Tl348Rl2F5/SzhtT8sbg==, figureFileBig=WcJrDBgrU93IX72flqKQDw==, tableContent=null), ArticleFig(id=1210892084849013631, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.5, caption=
Wiring diagram of temperature measurement system, figureFileSmall=VKQYHtCR+s2B8jSey3jfTw==, figureFileBig=1u3jhYrpX/VfFqognRUoWg==, tableContent=null), ArticleFig(id=1210892084945482626, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图5, caption=
测温系统接线示意图, figureFileSmall=VKQYHtCR+s2B8jSey3jfTw==, figureFileBig=1u3jhYrpX/VfFqognRUoWg==, tableContent=null), ArticleFig(id=1210892085025174407, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.6, caption=
Schematic diagram of temperature measurement point for single-core cable body, figureFileSmall=8HgS9cJaMZW2cXegBVXxBg==, figureFileBig=KJrL9coL/i57Y1pvHkN3qw==, tableContent=null), ArticleFig(id=1210892085134226314, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图6, caption=
单芯电缆本体测温取点示意图, figureFileSmall=8HgS9cJaMZW2cXegBVXxBg==, figureFileBig=KJrL9coL/i57Y1pvHkN3qw==, tableContent=null), ArticleFig(id=1210892085251666831, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.7, caption=
The ampacity changes before and after backfilling the low thermal resistance material of the cable laying in the piping, figureFileSmall=wKxpBQ/RJesM06lAFg/ySg==, figureFileBig=VSC3YWqknu88repU6ZslNw==, tableContent=null), ArticleFig(id=1210892085348135824, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图7, caption=
排管敷设电缆回填低热阻材料前后的载流量变化, figureFileSmall=wKxpBQ/RJesM06lAFg/ySg==, figureFileBig=VSC3YWqknu88repU6ZslNw==, tableContent=null), ArticleFig(id=1210892085469770646, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.8, caption=
Schematic diagram of 2×3 piping laying cable structure, figureFileSmall=P2CTEhIz2zi1tSu8mima5w==, figureFileBig=gafIDUl0VeRfIiTi+W8aAw==, tableContent=null), ArticleFig(id=1210892085595599766, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图8, caption=
2×3排管敷设电缆结构示意图, figureFileSmall=P2CTEhIz2zi1tSu8mima5w==, figureFileBig=gafIDUl0VeRfIiTi+W8aAw==, tableContent=null), ArticleFig(id=1210892085692068764, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.9, caption=
Schematic diagram of boundary conditions, figureFileSmall=aCffUrKkQi5t7/H2c2muPg==, figureFileBig=OwAMfmnufc7NJpsn/Yjt9g==, tableContent=null), ArticleFig(id=1210892085792732063, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图9, caption=
边界条件示意图, figureFileSmall=aCffUrKkQi5t7/H2c2muPg==, figureFileBig=OwAMfmnufc7NJpsn/Yjt9g==, tableContent=null), ArticleFig(id=1210892085914366881, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.10, caption=
Flow chart for evaluating the thermal conductivity of backfill materials and the ampacity of cables, figureFileSmall=OJZtsG+bW0iOUgUkD0kC1Q==, figureFileBig=8ca19xEkO2664UrCUdHefw==, tableContent=null), ArticleFig(id=1210892086056973222, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图10, caption=
评估回填材料导热系数与电缆载流量的流程图, figureFileSmall=OJZtsG+bW0iOUgUkD0kC1Q==, figureFileBig=8ca19xEkO2664UrCUdHefw==, tableContent=null), ArticleFig(id=1210892086145053607, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.11, caption=
Temperature field distribution of 2×3 piping laying cable, figureFileSmall=/RZ6VmUYio4FeQP3KCeEIQ==, figureFileBig=EVOB80dZQa8hL03tqg+15w==, tableContent=null), ArticleFig(id=1210892086283465643, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图11, caption=
2×3排管敷设电缆温度场分布, figureFileSmall=/RZ6VmUYio4FeQP3KCeEIQ==, figureFileBig=EVOB80dZQa8hL03tqg+15w==, tableContent=null), ArticleFig(id=1210892086409294768, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Fig.12, caption=
The ampacity of the cable when laying 110 kV 630 mm2 cables with 2×3 rows of pipes and backfilling materials with different thermal conductivity, figureFileSmall=rwVhEc5d9z0zqLEKxG/OPA==, figureFileBig=RCLME29HLoJpCdzy5Y0Qow==, tableContent=null), ArticleFig(id=1210892086526735282, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=图12, caption=
2×3排管敷设110kV 630mm2电缆回填不同导热系数材料时电缆的载流量, figureFileSmall=rwVhEc5d9z0zqLEKxG/OPA==, figureFileBig=RCLME29HLoJpCdzy5Y0Qow==, tableContent=null), ArticleFig(id=1210892086610621364, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Tab.1, caption=
Main performance indicators of new low thermal resistance materials, figureFileSmall=null, figureFileBig=null, tableContent=
| 试验项目 | 试验数据 | 参考方法 |
|---|
| 热阻系数/(cm·K/W)(初始态) | 15~18 | GB/T 10297—2015 |
| 热阻系数/(cm·K/W)(潮湿态) | 30~40 |
| 抗压强度/MPa(潮湿态) | 2.0~3.0 | GB/T 17671—1999 |
| 抗压强度/MPa(干燥态) | 2.2~3.3 |
| 耐火实验 | 无可燃物 | GB/T 22459.7—2019 |
| 抗渗实验(长期态) | pH>8 | GB/T 50082—2009 |
| 抗渗实验(初始态) | pH>13 |
| 温度适应性/℃ | 0~90 | — |
| 密度/(g/cm3) | 1.55 | GB/T 50080—2016 |
), ArticleFig(id=1210892086711284658, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=表1, caption=
新型低热阻材料主要性能指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试验项目 | 试验数据 | 参考方法 |
|---|
| 热阻系数/(cm·K/W)(初始态) | 15~18 | GB/T 10297—2015 |
| 热阻系数/(cm·K/W)(潮湿态) | 30~40 |
| 抗压强度/MPa(潮湿态) | 2.0~3.0 | GB/T 17671—1999 |
| 抗压强度/MPa(干燥态) | 2.2~3.3 |
| 耐火实验 | 无可燃物 | GB/T 22459.7—2019 |
| 抗渗实验(长期态) | pH>8 | GB/T 50082—2009 |
| 抗渗实验(初始态) | pH>13 |
| 温度适应性/℃ | 0~90 | — |
| 密度/(g/cm3) | 1.55 | GB/T 50080—2016 |
), ArticleFig(id=1210892086803559348, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Tab.2, caption=
YJLW0364/110 1×630 cable parameters, figureFileSmall=null, figureFileBig=null, tableContent=
| 结构 | 材料 | 内径/mm | 外径/mm | 厚度/mm | 热阻率/((m·K)/W) |
|---|
| 导体 | 铜 | 0 | 30.3 | 15.15 | 2.5×10-3 |
| 导体屏蔽 | 半导电 | 30.3 | 32.9 | 1.3 | 3.5 |
| 绝缘层 | XLPE | 32.9 | 65.9 | 16.5 | 3.5 |
| 绝缘屏蔽 | 半导电 | 65.9 | 67.9 | 1.0 | 3.5 |
| 绕包层 | 阻水带 | 67.9 | 70.9 | 1.5 | 6.0 |
| 气隙层 | 空气 | 70.9 | 74.9 | 2.0 | 34.0 |
| 金属护套 | 铝 | 74.5 | 88.5 | 2.0 | 4.2×10-3 |
| 外护层 | PE | 88.5 | 99.5 | 5.5 | 3.5 |
), ArticleFig(id=1210892086879056823, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=表2, caption=
YJLW0364/110 1×630电缆参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 结构 | 材料 | 内径/mm | 外径/mm | 厚度/mm | 热阻率/((m·K)/W) |
|---|
| 导体 | 铜 | 0 | 30.3 | 15.15 | 2.5×10-3 |
| 导体屏蔽 | 半导电 | 30.3 | 32.9 | 1.3 | 3.5 |
| 绝缘层 | XLPE | 32.9 | 65.9 | 16.5 | 3.5 |
| 绝缘屏蔽 | 半导电 | 65.9 | 67.9 | 1.0 | 3.5 |
| 绕包层 | 阻水带 | 67.9 | 70.9 | 1.5 | 6.0 |
| 气隙层 | 空气 | 70.9 | 74.9 | 2.0 | 34.0 |
| 金属护套 | 铝 | 74.5 | 88.5 | 2.0 | 4.2×10-3 |
| 外护层 | PE | 88.5 | 99.5 | 5.5 | 3.5 |
), ArticleFig(id=1210892087000691642, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Tab.3, caption=
Load current, conductor temperature, and skin temperature of test cable, figureFileSmall=null, figureFileBig=null, tableContent=
| 回填材料 | 电缆编号 | 负荷电流/A | 导体温度/℃ | 表皮温度/℃ |
|---|
| — | 1 | 996.6 | 90.1 | 62.2 |
| 2 | 996.8 | 90.8 | 63.4 |
| 3 | 998.0 | 89.2 | 61.3 |
| 4 | 996.6 | 88.7 | 60.8 |
| 5 | 996.8 | 89.9 | 62.6 |
| 6 | 998.0 | 85.1 | 59.7 |
| 低热阻材料 | 7 | 1247.6 | 81.3 | 51.4 |
| 8 | 1248.2 | 84.5 | 56.1 |
| 9 | 1250.4 | 85.5 | 56.2 |
| 10 | 1247.6 | 84.5 | 53.4 |
| 11 | 1248.2 | 92.6 | 57.1 |
| 12 | 1250.4 | 79.4 | 52.4 |
), ArticleFig(id=1210892087122326458, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=表3, caption=
试验电缆的负荷电流、导体温度和表皮温度
, figureFileSmall=null, figureFileBig=null, tableContent=
| 回填材料 | 电缆编号 | 负荷电流/A | 导体温度/℃ | 表皮温度/℃ |
|---|
| — | 1 | 996.6 | 90.1 | 62.2 |
| 2 | 996.8 | 90.8 | 63.4 |
| 3 | 998.0 | 89.2 | 61.3 |
| 4 | 996.6 | 88.7 | 60.8 |
| 5 | 996.8 | 89.9 | 62.6 |
| 6 | 998.0 | 85.1 | 59.7 |
| 低热阻材料 | 7 | 1247.6 | 81.3 | 51.4 |
| 8 | 1248.2 | 84.5 | 56.1 |
| 9 | 1250.4 | 85.5 | 56.2 |
| 10 | 1247.6 | 84.5 | 53.4 |
| 11 | 1248.2 | 92.6 | 57.1 |
| 12 | 1250.4 | 79.4 | 52.4 |
), ArticleFig(id=1210892087210406844, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=EN, label=Tab.4, caption=
The improving rate of ampacity of the laying 110 kV 630 mm2 cable with 2×3 rows of pipes before and after backfilling material, figureFileSmall=null, figureFileBig=null, tableContent=
| 回填材料的导热系数/(W/(m·K)) | 电缆载流/A | 提升率/% |
|---|
| — | 971 | — |
| 0.1 | 962 | -0.93 |
| 0.2 | 985 | 1.44 |
| 1 | 1 057 | 8.86 |
| 2 | 1 092 | 12.46 |
| 3 | 1 113 | 14.62 |
| 4 | 1 127 | 16.07 |
| 5 | 1 137 | 17.10 |
| 6 | 1 145 | 17.92 |
| 7 | 1 152 | 18.64 |
| 8 | 1 157 | 19.16 |
| 9 | 1 162 | 19.67 |
| 10 | 1 166 | 20.08 |
| 11 | 1 169 | 20.39 |
| 12 | 1 172 | 20.70 |
| 13 | 1 175 | 21.01 |
), ArticleFig(id=1210892087298487231, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209926729607549374, language=CN, label=表4, caption=
2×3排管敷设110 kV 630 mm2电缆回填材料前后电缆载流量的提升率
, figureFileSmall=null, figureFileBig=null, tableContent=
| 回填材料的导热系数/(W/(m·K)) | 电缆载流/A | 提升率/% |
|---|
| — | 971 | — |
| 0.1 | 962 | -0.93 |
| 0.2 | 985 | 1.44 |
| 1 | 1 057 | 8.86 |
| 2 | 1 092 | 12.46 |
| 3 | 1 113 | 14.62 |
| 4 | 1 127 | 16.07 |
| 5 | 1 137 | 17.10 |
| 6 | 1 145 | 17.92 |
| 7 | 1 152 | 18.64 |
| 8 | 1 157 | 19.16 |
| 9 | 1 162 | 19.67 |
| 10 | 1 166 | 20.08 |
| 11 | 1 169 | 20.39 |
| 12 | 1 172 | 20.70 |
| 13 | 1 175 | 21.01 |
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