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Article(id=1193230616037651008, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1193230615618220608, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2025.02.005, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1724688000000, receivedDateStr=2024-08-27, revisedDate=1729094400000, revisedDateStr=2024-10-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1762417948016, onlineDateStr=2025-11-06, pubDate=1739980800000, pubDateStr=2025-02-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762417948016, onlineIssueDateStr=2025-11-06, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762417948016, creator=13701087609, updateTime=1762417948016, updator=13701087609, issue=Issue{id=1193230615618220608, tenantId=1146029695717560320, journalId=1149653034449285133, year='2025', volume='58', issue='2', pageStart='1', pageEnd='138', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762417947916, creator=13701087609, updateTime=1762418457365, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1193232752444145866, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1193230615618220608, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1193232752444145867, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1193230615618220608, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=32, endPage=38, ext={EN=ArticleExt(id=1193230616301892163, articleId=1193230616037651008, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Effects of electrode materials on decomposition characteristics of C4F7N/CO2 gas mixture under corona discharge, columnId=1193230616230588994, journalTitle=Insulating Materials, columnName=Special Issue on Eco-friendly Insulating Gas, runingTitle=null, highlight=

Perfluoroisobutyronitrile (C4F7N) has excellent eco-friendly and insulation properties, and is the mainstream environmentally friendly gas to replace SF6 gas. In this paper, a series of power frequency AC corona discharge experiments were conducted on C4F7N/CO2 gas mixture by needle-plate electrode, and then the influences of different electrode materials (stainless steel, aluminum, and brass) and applied voltages on the decomposition characteristics of C4F7N/CO2 gas mixture were analyzed based on gas chromatography/mass spectrometry. The results show that the contents of the characteristic decomposition gases of C4F7N/CO2 gas mixture increase with the increase of applied voltages, and are obviously affected by the chemical activity of metal materials, among them, the total amount of decomposition products under aluminum electrode is the highest. The content ratios of characteristic decomposition gases, that is c[C2F6]/c[CF4] and v[C2F4]/v[C3F6], have good recognition degree for electrode materials and corona discharge degree.

, articleAbstract=

Perfluoroisobutyronitrile (C4F7N) has excellent eco-friendly and insulation properties, and is the mainstream environmentally friendly gas to replace SF6 gas. In this paper, a series of power frequency AC corona discharge experiments were conducted on C4F7N/CO2 gas mixture by needle-plate electrode, and then the influences of different electrode materials (stainless steel, aluminum, and brass) and applied voltages on the decomposition characteristics of C4F7N/CO2 gas mixture were analyzed based on gas chromatography/mass spectrometry. The results show that the contents of the characteristic decomposition gases of C4F7N/CO2 gas mixture increase with the increase of applied voltages, and are obviously affected by the chemical activity of metal materials, among them, the total amount of decomposition products under aluminum electrode is the highest. The content ratios of characteristic decomposition gases, that is c[C2F6]/c[CF4] and v[C2F4]/v[C3F6], have good recognition degree for electrode materials and corona discharge degree.

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全氟异丁腈（C4F7N）的环保和绝缘性能优良，是替代SF6气体的主流环保气体。本文首先利用针-板电极对C4F7N/CO2混合气体开展了一系列工频交流电晕放电实验，然后基于气相色谱-质谱仪分析了不同电极材料（不锈钢、铝和黄铜）和施加电压对C4F7N/CO2混合气体分解特性的影响。结果表明：C4F7N/CO2混合气体特征分解气体的含量随施加电压的升高而增大，且受金属材料化学活性的影响明显，其中铝电极下的分解产物总量最高。特征分解气体含量比值c[C2F6]/c[CF4]和v[C2F4]/v[C3F6]对电极材料和电晕放电程度具有较好的识别度。

, articleAbstract=

全氟异丁腈（C4F7N）的环保和绝缘性能优良，是替代SF6气体的主流环保气体。本文首先利用针-板电极对C4F7N/CO2混合气体开展了一系列工频交流电晕放电实验，然后基于气相色谱-质谱仪分析了不同电极材料（不锈钢、铝和黄铜）和施加电压对C4F7N/CO2混合气体分解特性的影响。结果表明：C4F7N/CO2混合气体特征分解气体的含量随施加电压的升高而增大，且受金属材料化学活性的影响明显，其中铝电极下的分解产物总量最高。特征分解气体含量比值c[C2F6]/c[CF4]和v[C2F4]/v[C3F6]对电极材料和电晕放电程度具有较好的识别度。

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颜湘莲（1977-），女（汉族），湖南郴州人，教授级高级工程师，博士，主要从事SF6及替代气体、新型高压开关设备设计与研发、高压开关设备运行维护等研究工作。
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王浩（1983-），男（汉族），河北保定人，高级工程师，主要从事特高压GIS中VFTO防护、特高压GIL设计制造及运行监测、环保型开关设备等研究工作。

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王浩（1983-），男（汉族），河北保定人，高级工程师，主要从事特高压GIS中VFTO防护、特高压GIL设计制造及运行监测、环保型开关设备等研究工作。

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王浩（1983-），男（汉族），河北保定人，高级工程师，主要从事特高压GIS中VFTO防护、特高压GIL设计制造及运行监测、环保型开关设备等研究工作。

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Insulating Materials,2024,57(9):26-36., articleTitle=Effect of physical structure and chemical modification of molecular sieves on adsorption properties of C4F7N and its decomposition products, refAbstract=null)], funds=[Fund(id=1193616330071961918, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193230616037651008, awardId=5108-202218280A-2-219-XG, language=CN, fundingSource=国网公司总部科技项目(5108-202218280A-2-219-XG), fundOrder=null, country=null), Fund(id=1193616330130682175, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193230616037651008, awardId=2017YFB0902500, language=CN, fundingSource=国家重点研发计划项目(2017YFB0902500), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1193616324543869156, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193230616037651008, xref=1, ext=[AuthorCompanyExt(id=1193616324552257765, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193230616037651008, 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tableContent=null), ArticleFig(id=1193616329904189756, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193230616037651008, language=EN, label=Table 1, caption=GC-MS detection parameters, figureFileSmall=null, figureFileBig=null, tableContent=
项目设置条件
分析程序35℃保持18 min，以10℃/min升高至150℃保持5 min
载气氦气，纯度>99.999%
载气流速/(mL/min)1.55
进样方式六通阀分流进样，六通阀体积为250 μL
分离比50∶1
注入室温度/℃120
电离方式70 eV电子轰击电离源（EI）
离子源温度/℃200
扫描质量范围/amu12～360
溶剂延迟时间/min0.65
), ArticleFig(id=1193616329954521405, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193230616037651008, language=CN, label=表1, caption=

气相色谱-质谱检测参数

, figureFileSmall=null, figureFileBig=null, tableContent=
项目设置条件
分析程序35℃保持18 min，以10℃/min升高至150℃保持5 min
载气氦气，纯度>99.999%
载气流速/(mL/min)1.55
进样方式六通阀分流进样，六通阀体积为250 μL
分离比50∶1
注入室温度/℃120
电离方式70 eV电子轰击电离源（EI）
离子源温度/℃200
扫描质量范围/amu12～360
溶剂延迟时间/min0.65
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电极材料对C4F7N/CO2混合气体电晕放电分解特性的影响
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王浩 1 , 颜湘莲 1 , 韩冬 2 , 姚尧 3 , 马德英 4 , 刘晓波 5
绝缘材料 | 环保绝缘气体专题 2025,58(2): 32-38
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绝缘材料 | 环保绝缘气体专题 2025, 58(2): 32-38
电极材料对C4F7N/CO2混合气体电晕放电分解特性的影响
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王浩1, 颜湘莲1, 韩冬2, 姚尧3, 马德英4, 刘晓波5
作者信息
  • 1中国电力科学研究院有限公司，北京 100192
  • 2中国科学院电工研究所，北京 100190
  • 3国网湖北省电力有限公司电力科学研究院，湖北 武汉 430015
  • 4国网河南省电力公司电力科学研究院，河南 郑州 450052
  • 5国网电力科学研究院武汉南瑞有限责任公司，湖北 武汉 430070

    • 王浩（1983-），男（汉族），河北保定人，高级工程师，主要从事特高压GIS中VFTO防护、特高压GIL设计制造及运行监测、环保型开关设备等研究工作。

通讯作者:

颜湘莲（1977-），女（汉族），湖南郴州人，教授级高级工程师，博士，主要从事SF6及替代气体、新型高压开关设备设计与研发、高压开关设备运行维护等研究工作。
Effects of electrode materials on decomposition characteristics of C4F7N/CO2 gas mixture under corona discharge
Hao WANG1, Xianglian YAN1, Dong HAN2, Rao YAO3, Deying MA4, Xiaobo LIU5
Affiliations
  • 1China Electric Power Research Institute, Beijing 100192, China
  • 2Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • 3Electric Power Research Institute, State Grid Hubei Electric Power Co., Ltd., Wuhan 430015, China
  • 4Electric Power Research Institute, State Grid Henan Electric Power Co., Ltd., Zhengzhou 450052, China
  • 5State Grid Electric Power Research Institute Wuhan Nanrui Co., Ltd., Wuhan 430070, China
出版时间: 2025-02-20 doi: 10.16790/j.cnki.1009-9239.im.2025.02.005
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摘要
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全氟异丁腈（C4F7N）的环保和绝缘性能优良，是替代SF6气体的主流环保气体。本文首先利用针-板电极对C4F7N/CO2混合气体开展了一系列工频交流电晕放电实验，然后基于气相色谱-质谱仪分析了不同电极材料（不锈钢、铝和黄铜）和施加电压对C4F7N/CO2混合气体分解特性的影响。结果表明：C4F7N/CO2混合气体特征分解气体的含量随施加电压的升高而增大，且受金属材料化学活性的影响明显，其中铝电极下的分解产物总量最高。特征分解气体含量比值c[C2F6]/c[CF4]和v[C2F4]/v[C3F6]对电极材料和电晕放电程度具有较好的识别度。

C4F7N/CO2混合气体  /  电晕放电  /  分解特性  /  电极材料  /  特征气体

Perfluoroisobutyronitrile (C4F7N) has excellent eco-friendly and insulation properties, and is the mainstream environmentally friendly gas to replace SF6 gas. In this paper, a series of power frequency AC corona discharge experiments were conducted on C4F7N/CO2 gas mixture by needle-plate electrode, and then the influences of different electrode materials (stainless steel, aluminum, and brass) and applied voltages on the decomposition characteristics of C4F7N/CO2 gas mixture were analyzed based on gas chromatography/mass spectrometry. The results show that the contents of the characteristic decomposition gases of C4F7N/CO2 gas mixture increase with the increase of applied voltages, and are obviously affected by the chemical activity of metal materials, among them, the total amount of decomposition products under aluminum electrode is the highest. The content ratios of characteristic decomposition gases, that is c[C2F6]/c[CF4] and v[C2F4]/v[C3F6], have good recognition degree for electrode materials and corona discharge degree.

C4F7N/CO2 gas mixture  /  corona discharge  /  decomposition characteristics  /  electrode materials  /  characteristic gas
王浩, 颜湘莲, 韩冬, 姚尧, 马德英, 刘晓波. 电极材料对C4F7N/CO2混合气体电晕放电分解特性的影响. 绝缘材料, 2025 , 58 (2) : 32 -38 . DOI: 10.16790/j.cnki.1009-9239.im.2025.02.005
Hao WANG, Xianglian YAN, Dong HAN, Rao YAO, Deying MA, Xiaobo LIU. Effects of electrode materials on decomposition characteristics of C4F7N/CO2 gas mixture under corona discharge[J]. Insulating Materials, 2025 , 58 (2) : 32 -38 . DOI: 10.16790/j.cnki.1009-9239.im.2025.02.005
正文
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0 引言
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六氟化硫（SF6）气体是气体绝缘电气设备中主要的绝缘和灭弧介质，其全球增温潜势（global war-ming potential，GWP）是二氧化碳（CO2）的24 300倍，大气寿命约为3 200年。因SF6的温室效应高、大气寿命长，被《京都议定书》列为严格限制使用的气体，欧美发达国家也纷纷推出SF6禁用时间表，因此SF6的环保替代势在必行[1-2]。
全氟异丁腈（(CF3)2CFCN，分子简式为C4F7N）的GWP值为CO2的2 750倍，绝缘强度约为SF6的2.2倍，在环保和绝缘性能方面表现优异，是SF6替代气体的研究热点[3-10]。国内外学者就C4F7N混合气体的绝缘性能、灭弧性能、分解特性与相容性等开展了大量研究[3-6]，结果表明对于C4F7N体积分数为4%～10%的C4F7N/CO2混合气体工频电气强度为同气压下SF6的75%及以上，而C4F7N体积分数为20%的C4F7N/CO2混合气体工频电气强度与SF6相当。国内外相关设备厂家也研制出C4F7N混合气体设备样机，如气体绝缘输电管道（GIL）、气体绝缘组合电器（GIS）和断路器等[7-8]。在气体绝缘电气设备中，气体绝缘介质被许多固体材料包围，如果气体绝缘介质与这些材料出现化学不兼容，则会危害电气设备的长期稳定运行。考察某一替代气体能否应用于实际的电气设备中，除电气性能外，其分解特性与相容性也是必须考虑的因素。美国GE公司、武汉大学、西安交通大学、西安理工大学、武汉理工大学、华北电力大学、中国电力科学研究院、中国科学院电工研究所等单位对C4F7N的分解特性与相容性进行了探索[9-24]，主要聚焦于热力学性质、分解机理、典型缺陷识别、气体检测，以及C4F7N混合气体与电气设备常用橡胶、固体绝缘、金属等材料的相容特性。结果表明，C4F7N及其混合气体的分解特性和主要分解产物含量与缺陷类型、故障严重程度、缓冲气体及混合比例等密切相关，除部分密封材料和吸附剂外，其与设备常用材料的相容性良好。而基于C4F7N及其混合气体分解特性的故障判据与检测技术可为C4F7N混合气体电气设备的运维提供有力支撑。
设备运行中典型的局部放电是电晕放电，主要由导体上的尖端或突起所致，长时间持续电晕放电可造成电气设备的绝缘劣化或故障。电晕放电下，绝缘气体分子因碰撞电离将发生裂解，并产生稳定的分解产物。为此，本研究采用针-板电极模型模拟工频交流电晕放电，基于气相色谱-质谱（gas chromatography/mass spectrometry，GC/MS）仪，分析不同电极材料和施加电压等因素下C4F7N/CO2混合气体的特征分解气体含量及含量比值的变化趋势，以期为C4F7N混合气体绝缘电气设备的缺陷识别与诊断提供理论支撑和参考。
1 电晕放电下的气体分解特性实验
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1.1 电晕放电实验平台
图1为电晕放电实验平台示意图。采用150 kV试验变压器提供工频交流高压电源（局部放电量＜1 pC）；试验变压器连接500 pF的耦合电容和10 kΩ的限流电阻。数字局放仪用来测量电晕放电的局部放电量，精度为0.1 pC，采样率为5 MHz，非线性误差为5%。
针-板电极模型置于实验气室中，用来模拟交流电晕放电，其电极形状及尺寸如图2所示。3种针电极材料分别为304不锈钢、铝或黄铜，针尖曲率半径约为0.3 mm；板电极直径为30 mm，厚度为 5 mm；针、板电极距离为10 mm。实验气体体积约为1.7 L。
实验前，为尽可能减少水分、空气、固体颗粒等杂质的影响，重复抽真空-洗气步骤3～4次对实验气室进行充分清洗，其中抽真空时间为30～40 min。根据道尔顿分压定律，按分压比先充入C4F7N气体，再充入缓冲气体CO2。将实验气室放置于室温下24 h，使各组分气体充分混合。本文实验用的C4F7N气体纯度为99.9%以上，CO2气体纯度为99.995%。
1.2 检测方法
采用QP 2010 SE型GC-MS仪对C4F7N/CO2混合气体的分解产物进行定性和定量检测，其中，定性分析采用全扫描（Scan）方式，与美国国家标准与技术研究院（NIST）质谱数据库的标准气体对照后确定气体组分；定量分析采用离子扫描（single ion monitoring, SIM）方式，分析分解产物特性碎片离子的色谱峰。
C4F7N混合气体的分解产物大多为全氟烷烃，含量为10-6级。通过对多种色谱柱进行全面分析比较，最终选用Gas Pro毛细管柱作为分解产物的分析柱。色谱柱的尺寸为30 m×0.32 mm。表1为C4F7N/CO2混合气体分解产物的气相色谱-质谱检测参数。
2 实验结果与讨论
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2.1 分解气体组分
在电晕放电条件下，C4F7N初步裂解为CF3·、F·、CN·、CF3CFCN·、(CF3)2CF·和(CF3)2CCN·等自由基，这些自由基可相互结合形成稳定的化合物；也可在电场作用下进一步裂解生成小分子自由基或中间体，再相互结合形成稳定的化合物。
采用不锈钢电极时，C4F7N/CO2混合气体电晕放电后的色谱总离子流如图3所示。实验条件如下：施加电压为35 kV，放电持续时间为5 h，气压为200 kPa，C4F7N体积分数为15%。采用铝或黄铜电极时C4F7N/CO2混合气体的电晕放电分解产物与采用不锈钢电极时的基本相同。由图3可知，电晕放电下，C4F7N/CO2混合气体的分解产物主要包括CO、CF4、C2F4、C2F6、C3F6、C3F8、i-C4F10、CF3CN、C2F5CN和CNCN等。
2.2 分解气体含量及影响因素
2.2.1 电极材料的影响
不锈钢、铝和黄铜电极材料对C4F7N/CO2分解产物含量的影响如图4所示，其中SS代表不锈钢电极，Al代表铝电极，Cu代表黄铜电极。实验时，C4F7N的体积分数为5%，气压为200 kPa，施加电压为30 kV，放电持续时间为5 h。从图4可以看出，在同一施加电压下，CO和CF4是C4F7N/CO2电晕放电的主要分解产物。
对于CO、CF4、C2F6、C3F6和C3F8等标准气体分解产物，采用外标定量法检测其含量，而对于C2F4、i-C4F10、CF3CN、C2F5CN、CNCN等非标准气体分解产物，通过它们特征离子的色谱峰面积进行含量比较（以铝电极下产生的分解产物含量为基准）。每种电极材料各重复3次实验，测量结果取平均值。
由图4可知，铝电极下绝大部分标准气体分解产物含量是不锈钢电极下的两倍以上，只有C3F6气体的含量略高于不锈钢电极。采用不锈钢电极时，4种可定量氟碳气体的含量由高到低依次为CF4、C3F6、C3F8、C2F6。采用纯铝电极时，4种可定量氟碳气体的含量由高到低依次为CF4、C3F8、C2F6、C3F6。对于非标准气体分解产物，铝电极下产生的分解产物含量相同且较高，除铜电极下产生的C2F4含量最高外，不锈钢电极和铜电极下产生的分解产物含量约为铝电极下产生的一半及以下。
根据SF6分解特性的相关研究，金属电极材料的化学活性会影响气体的放电分解特性[10,15]。化学活性高的金属材料会促进C4F7N和CO2分子的分解，导致生成的CF3·、CN·、CF3CFCN·、F·等自由基增多，进而加快分解产物的生成速率，使对应的分解产物含量增加。实验所采用的不锈钢电极为304不锈钢，在加工过程中会通过钝化处理以增强其耐腐蚀性，相应地其化学活性显著降低，因此不锈钢电极下电晕放电产生的分解产物总量最低。与不锈钢相比，铝的化学活性最高，因此铝电极下电晕放电产生的分解产物总量最高。黄铜活性介于不锈钢和铝之间，因此黄铜电极下电晕放电产生的分解产物总量居中。
2.2.2 施加电压的影响
图5为不同施加电压下，采用铝电极和不锈钢电极时C4F7N/CO2分解产物含量的变化趋势。实验时，C4F7N体积分数为15%，施加电压分别为30、35、40 kV，放电量为200～300 pC，放电持续时间为5 h，气压为200 kPa。每个施加电压下各重复3次实验，测量结果取平均值。从图5可以看出，随着施加电压增大，C4F7N/CO2分解产物的含量持续增加，分解产物含量与施加电压呈正相关。这主要是因为当施加电压增大时，针尖附近辉光放电区的范围以及电场强度均会相应增大，使得C4F7N、CO2分子与电子发生碰撞电离的概率增大。因此，CF3·、CN·、CF3CFCN·、F·等自由基随着施加电压的增大而增多，相应地经自由基耦合反应生成的稳定产物含量升高。
2.3 分解产物含量比值的变化趋势
图6为C4F7N解离路径及主要分解物的生成路径[14,16]，其中TS表示过渡态。从图6可以看出，CF4和C2F6分别主要来自于CF3·与F·、CF3·的自由基耦合反应，即CF4和C2F6的生成存在“竞争”关系。电晕放电条件下，CF3·中的C-F共价键断裂所需能量来源于电子碰撞反应中电子加速获得的动能，因此这种“竞争关系”在不同的放电程度下存在差异。本研究将C2F6与CF4含量比值记为c[C2F6]/c[CF4]。C2F4可由CF3CF·异构化生成，C3F6可由CF3CF·与CF2·结合生成，C2F4与C3F6之间可经异构化反应互相生成，因此二者也存在“竞争”关系。由于C2F4无法定量，本研究采用特征碎片离子的峰面积获得C2F4和C3F6的峰面积比值，相应的其含量比值记为v[C2F4]/v[C3F6]，C2F4和C3F6特征碎片离子的质荷比（m/z）分别为81和131。
图7为特征分解气体含量比值c[C2F6]/c[CF4]和v[C2F4]/v[C3F6]随施加电压的变化趋势。其中，C4F7N体积分数为10%，放电持续时间为5 h。
归因于金属材料的化学活性，由图4可知，铝电极下C4F7N/CO2电晕放电产生的C2F4、CF4和C2F6气体含量均高于不锈钢电极下的气体含量，而两种电极下产生的C3F6含量很接近。因此，铝电极下的c[C2F6]/c[CF4]和v[C2F4]/v[C3F6]含量比值均高于不锈钢电极，与图7描述的一致。
当施加电压升高时，电子能够获得更高的动能，C4F7N分子产生的CF3·含量增加，经自由基耦合反应生成的C2F6含量逐渐增大，进而c[C2F6]/c[CF4]也相应增大。此外，施加电压越高，C4F7N分子获得能量跨越能垒而异构化生成C3F6的概率越高，C3F6的含量增大，使得v[C2F4]/v[C3F6]减小。因此，在特定电极材料下，随放电程度增加，v[C2F4]/v[C3F6]呈现下降趋势。
将c[C2F6]/c[CF4]和v[C2F4]/v[C3F6]作为“特征对”，记为{c[C2F6]/c[CF4]，v[C2F4]/v[C3F6]}，对不锈钢电极和铝电极下的电晕放电实验数据进行分析，其二维空间的特征分布如图8所示。实验时气压为200 kPa和300 kPa，施加电压为25、30、35、40 kV，C4F7N体积分数为5%、10%、15%和20%。
从图8可以看出，不锈钢电极下c[C2F6]/c[CF4]分布在[0.05, 0.15]内，v[C2F4]/v[C3F6]分布主要在[0.08, 0.3]内；铝电极下c[C2F6]/c[CF4]分布在[0.18, 0.4]内，v[C2F4]/v[C3F6]分布在[0.22 0.53]内。采用不同的电极材料时，其分解产物含量比值在二维空间中有较明显的区域分布，该“特征对”对电极材料具有一定的识别度。
3 结论
收起
本文通过针-板电极的电晕放电实验，分析了不同电极材料、施加电压对C4F7N/CO2混合气体分解特性的影响，主要得到以下结论：
（1）电晕放电条件下，C4F7N/CO2混合气体的分解产物主要为CO、氟碳类气体及微量的腈类气体，分解产物含量随施加电压的升高而增大。
（2）分解产物含量受金属材料化学活性的影响较显著。化学活性高的金属材料可在一定程度上促进C4F7N和CO2分子的解离以及主要分解物的生成。铝电极下的分解物总量最高，铜电极下次之，不锈钢电极下最低。
（3）分解产物的含量比值c[C2F6]/c[CF4]和v[C2F4]/v[C3F6]对电极材料和电晕放电程度具有较好的识别度。
基金
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  • 国网公司总部科技项目(5108-202218280A-2-219-XG)
  • 国家重点研发计划项目(2017YFB0902500)
文献
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2025年第58卷第2期
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doi: 10.16790/j.cnki.1009-9239.im.2025.02.005
  • 接收时间：2024-08-27
  • 首发时间：2025-11-06
  • 出版时间：2025-02-20
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  • 收稿日期：2024-08-27
  • 修回日期：2024-10-17
基金
国网公司总部科技项目(5108-202218280A-2-219-XG)
国家重点研发计划项目(2017YFB0902500)
作者信息
    1中国电力科学研究院有限公司，北京 100192
    2中国科学院电工研究所，北京 100190
    3国网湖北省电力有限公司电力科学研究院，湖北 武汉 430015
    4国网河南省电力公司电力科学研究院，河南 郑州 450052
    5国网电力科学研究院武汉南瑞有限责任公司，湖北 武汉 430070

通讯作者:

颜湘莲（1977-），女（汉族），湖南郴州人，教授级高级工程师，博士，主要从事SF6及替代气体、新型高压开关设备设计与研发、高压开关设备运行维护等研究工作。
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
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