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DC optical current transformer (OCT) is an important equipment in high voltage direct current (HVDC) transmission project. Its safety and stability is of great significance to the power grid. In this paper, the causes of a DC optical current transformer fault at a converter station are analyzed and the possible location of the fault is investigated. Finally, it is determined that the change in the characteristic parameters of the fault is caused by the cracks produced after the long term deterioration of the optical fiber melting point. This work is of certain reference value for fault analysis of the OCT in engineering.
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作为高压直流输电工程中的重要设备,直流光电流互感器(OCT)的安全稳定运行对电网具有重要意义。本文对某换流站一起直流光电流互感器故障进行原因分析,对设备可能的故障位置进行排查,最终确定故障特征参数变化是由光纤熔点长期劣化产生的裂纹引起,可为实际工程中光电流互感器的故障分析提供参考。
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陈宇飞(1999—),男,河北省唐山市人,硕士,工程师,主要从事柔性直流输电技术研究工作。
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1 State Grid Jibei Electric Power Co., Ltd EHV Power Transmission Company, Beijing 102488
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1 国网冀北电力有限公司超高压分公司,北京 102488
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陈宇飞(1999—),男,河北省唐山市人,硕士,工程师,主要从事柔性直流输电技术研究工作。
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陈宇飞(1999—),男,河北省唐山市人,硕士,工程师,主要从事柔性直流输电技术研究工作。
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1 State Grid Jibei Electric Power Co., Ltd EHV Power Transmission Company, Beijing 102488
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1 State Grid Jibei Electric Power Co., Ltd EHV Power Transmission Company, Beijing 102488
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1 国网冀北电力有限公司超高压分公司,北京 102488
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1 国网冀北电力有限公司超高压分公司,北京 102488)]), AuthorCompany(id=1218290859615896257, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, xref=2, ext=[AuthorCompanyExt(id=1218290859624284866, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, companyId=1218290859615896257, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 State Grid Jibei Electric Power Co., Ltd EHV Power Transmission Company, Beijing 102488
2 Hebei Key Laboratory of Equipment and Technology Demonstration of Flexible DC Transmission, Tianjin 300100, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1218290860559614710, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, authorId=1218290860412814055, language=CN, stringName=刘鹏, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 国网冀北电力有限公司超高压分公司,北京 102488
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1 State Grid Jibei Electric Power Co., Ltd EHV Power Transmission Company, Beijing 102488
2 Hebei Key Laboratory of Equipment and Technology Demonstration of Flexible DC Transmission, Tianjin 300100, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1218290861998260995, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, authorId=1218290861826294523, language=CN, stringName=柳杨, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 国网冀北电力有限公司超高压分公司,北京 102488
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1 国网冀北电力有限公司超高压分公司,北京 102488)]), AuthorCompany(id=1218290859615896257, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, xref=2, ext=[AuthorCompanyExt(id=1218290859624284866, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, companyId=1218290859615896257, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 Hebei Key Laboratory of Equipment and Technology Demonstration of Flexible DC Transmission, Tianjin 300100), AuthorCompanyExt(id=1218290859628479171, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, companyId=1218290859615896257, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 河北省柔性直流输电装备与技术实证重点实验室,天津 300100)])])], keywords=[Keyword(id=1218290862199587594, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=EN, orderNo=1, keyword=direct current transmission), Keyword(id=1218290862291862285, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=EN, orderNo=2, keyword=optical current transformer (OCT)), Keyword(id=1218290862358971155, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=EN, orderNo=3, keyword=fiber deterioration), Keyword(id=1218290862442857243, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=EN, orderNo=4, keyword=fault), Keyword(id=1218290862556103455, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=CN, orderNo=1, keyword=直流输电), Keyword(id=1218290862635795236, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=CN, orderNo=2, keyword=光电流互感器(OCT)), Keyword(id=1218290862698709801, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=CN, orderNo=3, keyword=光纤劣化), Keyword(id=1218290862799373101, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=CN, orderNo=4, keyword=故障)], refs=[Reference(id=1218290864913302392, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, doi=null, pmid=null, pmcid=null, year=2017, volume=41, issue=7, pageStart=156, pageEnd=167, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=王永平, 赵文强, 杨建明, journalName=电力系统自动化, refType=null, unstructuredReference=王永平, 赵文强, 杨建明, 等. 混合直流输电技术及发展分析[J].
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2023(23): 114-116., articleTitle=光电流互感器故障引发交流滤波器差动保护动作问题分析, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1218290859532010171, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, xref=1, ext=[AuthorCompanyExt(id=1218290859540398780, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, companyId=1218290859532010171, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 State Grid Jibei Electric Power Co., Ltd EHV Power Transmission Company, Beijing 102488), AuthorCompanyExt(id=1218290859548787389, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, companyId=1218290859532010171, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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| 状态量 | 随温度上升变化趋势 |
| LED驱动电流 | 上升 |
| 二次谐波幅值 | 下降 |
| 四次谐波幅值 | 下降 |
| 平均偏差 | 上升 |
), ArticleFig(id=1218290864116384608, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=CN, label=表1, caption=
故障时现场各状态量随环境温度上升的变化趋势
, figureFileSmall=null, figureFileBig=null, tableContent=
| 状态量 | 随温度上升变化趋势 |
| LED驱动电流 | 上升 |
| 二次谐波幅值 | 下降 |
| 四次谐波幅值 | 下降 |
| 平均偏差 | 上升 |
), ArticleFig(id=1218290864217047908, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 状态量 | 正常 | 裂纹 增大1 | 裂纹 增大2 | 变化 趋势 |
| LED驱动电流/mA | 49.7 | 35.6 | 32.9 | 减小 |
| 二次谐波幅值/V | 0.763 | 0.294 | 0.229 | 减小 |
| 四次谐波幅值/V | 0.114 | 0.044 | 0.034 | 减小 |
| 平均偏差/V | -0.026 | -0.026 | 0.132 | 增大 |
), ArticleFig(id=1218290864300933991, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=CN, label=表2, caption=
各状态量变化试验结果
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| 状态量 | 正常 | 裂纹 增大1 | 裂纹 增大2 | 变化 趋势 |
| LED驱动电流/mA | 49.7 | 35.6 | 32.9 | 减小 |
| 二次谐波幅值/V | 0.763 | 0.294 | 0.229 | 减小 |
| 四次谐波幅值/V | 0.114 | 0.044 | 0.034 | 减小 |
| 平均偏差/V | -0.026 | -0.026 | 0.132 | 增大 |
), ArticleFig(id=1218290864401597289, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 信号 | 裂纹参数 |
| R | T | α |
| 0 | 0.04 | 0.96 | 0.07 |
| 1 | 0.04 | 0.70 | 0.07 |
), ArticleFig(id=1218290864489677675, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=CN, label=表3, caption=
光纤裂纹参数
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| 信号 | 裂纹参数 |
| R | T | α |
| 0 | 0.04 | 0.96 | 0.07 |
| 1 | 0.04 | 0.70 | 0.07 |
), ArticleFig(id=1218290864577758061, tenantId=1146029695717560320, journalId=1190235702286704641, articleId=1202649049297019378, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 信号 | 模拟结果 |
| Id/mA | V2h/V | V4h/V | Vav/V |
| 0 | 16.26 | 0.12 | 0.006 4 | 1.44 |
| 1 | 22.88 | 0.09 | 0.004 6 | 1.52 |
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故障参数模拟结果
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| 信号 | 模拟结果 |
| Id/mA | V2h/V | V4h/V | Vav/V |
| 0 | 16.26 | 0.12 | 0.006 4 | 1.44 |
| 1 | 22.88 | 0.09 | 0.004 6 | 1.52 |
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