Article(id=1209927727579263867, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209927720432169632, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2024.03.012, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1680105600000, receivedDateStr=2023-03-30, revisedDate=1684684800000, revisedDateStr=2023-05-22, acceptedDate=null, acceptedDateStr=null, onlineDate=1766398849624, onlineDateStr=2025-12-22, pubDate=1710864000000, pubDateStr=2024-03-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766398849624, onlineIssueDateStr=2025-12-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766398849624, creator=13701087609, updateTime=1766398849624, updator=13701087609, issue=Issue{id=1209927720432169632, tenantId=1146029695717560320, journalId=1149653034449285133, year='2024', volume='57', issue='3', pageStart='1', pageEnd='128', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766398847920, creator=13701087609, updateTime=1766563849864, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1210619788792033962, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209927720432169632, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1210619788792033963, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1209927720432169632, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=89, endPage=95, ext={EN=ArticleExt(id=1209927728862720911, articleId=1209927727579263867, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Study on regulation of space/surface charge and surface electric field of DC GIL insulator by nonlinear conductive coating, columnId=1190369198472794288, journalTitle=Insulating Materials, columnName=Insulation Technology, runingTitle=null, highlight=null, articleAbstract=
Space/surface charge accumulation is a potential cause for the decrease of surface flashover voltage of DC GIL insulators. Applying nonlinear conductive coating is an effective method to improve the surface insulation performance. In this paper, a mathematical model was established for the regulation of space/surface charge and surface electric field of insulator by electric field dependent nonlinear con-ductive coating. The nonlinear relationships between the current density of insulating gas and the solid conductivity of insulator and the electric field intensity were comprehensively considered. The internal charge distribution law of insulator under temperature gradient distribution and the influence mechanism of nonlinear conductive coating on the surface charge accumulation of insulator were studied through this model. The results show that the nonlinear conductive coating promotes the dissipation of space charge obviously, and the homopolar charge near the high voltage electrode dominates the surface charge distribution. Due to the improvements of surface charge distribution and tangential electric field, the surface flashover performance improves. The positive charge may accumulate between the insulator and the coating interface, and decrease gradually from the high voltage electrode to the ground electrode.
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空间/表面电荷积聚是导致直流GIL绝缘子沿面闪络电压降低的潜在原因,涂敷非线性电导涂层是提升沿面绝缘性能的有效方法。本文建立了电场依赖性非线性电导涂层对绝缘子空间/表面电荷及沿面电场调控的数学模型,综合考虑了绝缘气体电流密度以及绝缘子固体电导率与电场强度的非线性关系,通过该模型研究了温度梯度分布下绝缘子内部电荷的分布规律,以及非线性电导涂层对绝缘子表面电荷积聚的影响机制。结果表明:非线性电导涂层对空间电荷消散有明显的促进作用,高压电极附近的同极性电荷主导了表面电荷分布;由于表面电荷分布和切向电场的改善,绝缘子的沿面闪络性能得到提高;在绝缘子与涂层界面之间会积聚正电荷,并从高压电极向地电极逐步递减。
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吴绩涛(1998-),男(汉族),河南信阳人,硕士生,主要从事高压绝缘材料性能的研究。
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陈继明(1970-),男(汉族),山东济宁人,副教授,主要从事电力系统故障检测诊断工作。
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陈继明(1970-),男(汉族),山东济宁人,副教授,主要从事电力系统故障检测诊断工作。
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Diagram of solid-gas interface vector of the coating, figureFileSmall=g6AjIeiKwSbKUkG2LIrNCw==, figureFileBig=Ty65fU8bJfLsXtY4iVxIjQ==, tableContent=null), ArticleFig(id=1217486325289243272, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图1, caption=
涂层固-气界面向量示意图, figureFileSmall=g6AjIeiKwSbKUkG2LIrNCw==, figureFileBig=Ty65fU8bJfLsXtY4iVxIjQ==, tableContent=null), ArticleFig(id=1217486325410878095, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.2, caption=
Diagram of Maxwell-Wagner polarization model, figureFileSmall=fjs78C2Mvja0kagHnlDFvA==, figureFileBig=sDuqC+5fCy0yzqae+GBv4A==, tableContent=null), ArticleFig(id=1217486325503152790, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图2, caption=
Maxwell-Wagner极化模型示意图, figureFileSmall=fjs78C2Mvja0kagHnlDFvA==, figureFileBig=sDuqC+5fCy0yzqae+GBv4A==, tableContent=null), ArticleFig(id=1217486325574455961, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.3, caption=
Geometric simulation model of circular insulator, figureFileSmall=i3DQjyaA9fJ5dkYpa8ti/w==, figureFileBig=PIO2sH6SLP9F4Qhy+hNuig==, tableContent=null), ArticleFig(id=1217486325675119260, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图3, caption=
圆台绝缘子几何仿真模型, figureFileSmall=i3DQjyaA9fJ5dkYpa8ti/w==, figureFileBig=PIO2sH6SLP9F4Qhy+hNuig==, tableContent=null), ArticleFig(id=1217486325767393956, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.4, caption=
Internal temperature distribution of DC GIL in stable state, figureFileSmall=1DThwZH7Y5fADr4GqpJj9g==, figureFileBig=f2OxmC/qwQ/JR971l8V+AQ==, tableContent=null), ArticleFig(id=1217486325876445865, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图4, caption=
稳定状态下直流GIL内部温度分布, figureFileSmall=1DThwZH7Y5fADr4GqpJj9g==, figureFileBig=f2OxmC/qwQ/JR971l8V+AQ==, tableContent=null), ArticleFig(id=1217486325972914860, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.5, caption=
Conductivity distribution inside the coating in stable state, figureFileSmall=gjPvenQOkapO4krwRly3uA==, figureFileBig=RVTtC9PAdF61ByMU6DMvNQ==, tableContent=null), ArticleFig(id=1217486326065189552, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图5, caption=
稳定状态下涂层内部电导率分布, figureFileSmall=gjPvenQOkapO4krwRly3uA==, figureFileBig=RVTtC9PAdF61ByMU6DMvNQ==, tableContent=null), ArticleFig(id=1217486326199407283, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.6, caption=
Space charge distribution of insulators in stable state before introducing coating, figureFileSmall=2pDEF3XD015zrMhc6Y49hw==, figureFileBig=3T/HJ++mbHnI/2Xqbzj3IQ==, tableContent=null), ArticleFig(id=1217486326304264889, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图6, caption=
引入涂层前稳定状态下绝缘子空间电荷分布, figureFileSmall=2pDEF3XD015zrMhc6Y49hw==, figureFileBig=3T/HJ++mbHnI/2Xqbzj3IQ==, tableContent=null), ArticleFig(id=1217486326404928189, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.7, caption=
Space charge distribution of insulators in stable state after introducing coating, figureFileSmall=hGLDq30NRy10Xlc1TDR0VQ==, figureFileBig=N9sJOQhOTEsG2UrYAv0KIg==, tableContent=null), ArticleFig(id=1217486326493008580, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图7, caption=
引入涂层后稳定状态下绝缘子空间电荷分布, figureFileSmall=hGLDq30NRy10Xlc1TDR0VQ==, figureFileBig=N9sJOQhOTEsG2UrYAv0KIg==, tableContent=null), ArticleFig(id=1217486326623032010, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.8, caption=
Charge density at the solid-gas interface, figureFileSmall=S+Hbay/GUIFIx15ZGTOGFg==, figureFileBig=6iSL4Y9SRxl/O/bRwi4ITw==, tableContent=null), ArticleFig(id=1217486326732083919, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图8, caption=
固-气界面电荷密度, figureFileSmall=S+Hbay/GUIFIx15ZGTOGFg==, figureFileBig=6iSL4Y9SRxl/O/bRwi4ITw==, tableContent=null), ArticleFig(id=1217486326836941525, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.9, caption=
Current density before and after introducing coating, figureFileSmall=0daZHNUavspN83Q7XKdj6A==, figureFileBig=hcyydZ8Yl1JiOwaGbTIkvA==, tableContent=null), ArticleFig(id=1217486326937604824, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图9, caption=
引入涂层前后电流密度, figureFileSmall=0daZHNUavspN83Q7XKdj6A==, figureFileBig=hcyydZ8Yl1JiOwaGbTIkvA==, tableContent=null), ArticleFig(id=1217486327017296605, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.10, caption=
Schematic diagram of the surface charge dominant mechanism, figureFileSmall=ieGRZpeU94wNViQIrw4OFA==, figureFileBig=W6yDtw4CSHel4YB9qmk+BQ==, tableContent=null), ArticleFig(id=1217486327126348517, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图10, caption=
表面电荷主导机制示意图, figureFileSmall=ieGRZpeU94wNViQIrw4OFA==, figureFileBig=W6yDtw4CSHel4YB9qmk+BQ==, tableContent=null), ArticleFig(id=1217486327197651684, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.11, caption=
Normal electric field intensity at the solid-gas interface, figureFileSmall=LsQe+6SXT+9Ijc7eKY5Wew==, figureFileBig=79R0e1dQzBTM/cSi7OWuUw==, tableContent=null), ArticleFig(id=1217486327294120682, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图11, caption=
固-气界面法向电场强度, figureFileSmall=LsQe+6SXT+9Ijc7eKY5Wew==, figureFileBig=79R0e1dQzBTM/cSi7OWuUw==, tableContent=null), ArticleFig(id=1217486327424144111, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.12, caption=
Tangential electric field intensity at the solid-gas interface, figureFileSmall=6s/DXsQAn0kUOK8TNAR7HQ==, figureFileBig=VOi1xhvuSR+l3swgBkVNtw==, tableContent=null), ArticleFig(id=1217486327524807412, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图12, caption=
固-气界面切向电场强度, figureFileSmall=6s/DXsQAn0kUOK8TNAR7HQ==, figureFileBig=VOi1xhvuSR+l3swgBkVNtw==, tableContent=null), ArticleFig(id=1217486327612887800, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Fig.13, caption=
Charge density at the solid-solid interface, figureFileSmall=eudY+/GG2Dl+SFz1ytGkQA==, figureFileBig=NiONZmVXlIwYi5oPTyCzow==, tableContent=null), ArticleFig(id=1217486327742911228, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=图13, caption=
固-固界面电荷密度, figureFileSmall=eudY+/GG2Dl+SFz1ytGkQA==, figureFileBig=NiONZmVXlIwYi5oPTyCzow==, tableContent=null), ArticleFig(id=1217486327940043522, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=EN, label=Tab.1, caption=
Simulation model parameters, figureFileSmall=null, figureFileBig=null, tableContent=
| 物理量 | 名称 | 数值 | 参考文献 |
|---|
| e/C | 单位电荷量 | 1.6×10-19 | [10] |
| kB/(J/K) | 玻尔兹曼常数 | 1.38×10-23 | [10] |
| 六氟化硫介电常数 | 1.002 | [10] |
| /(F/m) | 真空介电常数 | 8.854×10-12 | [26] |
| /(1/m3) | 初始正、负离子密度 | 1.14×1010 | [22] |
| /(S/m) | 临界电导率 | 1×10-13 | [23] |
| Ec/(kV/mm) | 临界电场强度 | 5 | [23] |
| 材料系数 | 10-20 | [24] |
| α0/(m/MV) | 电场敏感系数 | 1.25 | [24] |
| P/MPa | 仿真压强 | 0.5 | [22] |
| A/(S/m) | 材料系数 | 45.5 | [24] |
| B/K | 材料系数 | 1.086×104 | [24] |
| T0/K | 基准温度 | 273.15 | [26] |
| Th/K | 高压电极温度 | 371 | [26] |
| Tl/K | 地电极温度 | 333 | [26] |
| Ta/K | 大气温度 | 313 | [10] |
), ArticleFig(id=1217486328023929606, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1209927727579263867, language=CN, label=表1, caption=
仿真模型参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 物理量 | 名称 | 数值 | 参考文献 |
|---|
| e/C | 单位电荷量 | 1.6×10-19 | [10] |
| kB/(J/K) | 玻尔兹曼常数 | 1.38×10-23 | [10] |
| 六氟化硫介电常数 | 1.002 | [10] |
| /(F/m) | 真空介电常数 | 8.854×10-12 | [26] |
| /(1/m3) | 初始正、负离子密度 | 1.14×1010 | [22] |
| /(S/m) | 临界电导率 | 1×10-13 | [23] |
| Ec/(kV/mm) | 临界电场强度 | 5 | [23] |
| 材料系数 | 10-20 | [24] |
| α0/(m/MV) | 电场敏感系数 | 1.25 | [24] |
| P/MPa | 仿真压强 | 0.5 | [22] |
| A/(S/m) | 材料系数 | 45.5 | [24] |
| B/K | 材料系数 | 1.086×104 | [24] |
| T0/K | 基准温度 | 273.15 | [26] |
| Th/K | 高压电极温度 | 371 | [26] |
| Tl/K | 地电极温度 | 333 | [26] |
| Ta/K | 大气温度 | 313 | [10] |
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