Article(id=1154038483686515434, tenantId=1146029695717560320, journalId=1146031654075715584, issueId=1154038481564197598, articleNumber=null, orderNo=null, doi=10.13234/j.issn.2095-2805.2024.2.305, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1620662400000, receivedDateStr=2021-05-11, revisedDate=1624809600000, revisedDateStr=2021-06-28, acceptedDate=1629648000000, acceptedDateStr=2021-08-23, onlineDate=1753073815508, onlineDateStr=2025-07-21, pubDate=1711728000000, pubDateStr=2024-03-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753073815508, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753073815508, creator=13701087609, updateTime=1753073815508, updator=13701087609, issue=Issue{id=1154038481564197598, tenantId=1146029695717560320, journalId=1146031654075715584, year='2024', volume='22', issue='2', pageStart='1', pageEnd='455', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1753073815003, creator=13701087609, updateTime=1753780998609, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1157004624629683026, tenantId=1146029695717560320, journalId=1146031654075715584, issueId=1154038481564197598, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1157004624629683027, tenantId=1146029695717560320, journalId=1146031654075715584, issueId=1154038481564197598, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=305, endPage=315, ext={EN=ArticleExt(id=1154038484126917358, articleId=1154038483686515434, tenantId=1146029695717560320, journalId=1146031654075715584, language=EN, title=Fault Line Selection Algorithm for Flexible DC Distribution Network Based on PCA and EEMD, columnId=1152281496049037440, journalTitle=Journal of Power Supply, columnName=Power System, runingTitle=null, highlight=null, articleAbstract=
The development of the flexible DC fault line selection technology plays an important role for DC distri-bution network. In this paper, a novel algorithm is proposed to solve the problem that there is less available fault infor-mation about the existing flexible DC fault, which makes full use of the advantages of ensemble empirical mode decom-position (EEMD), principal component analysis (PCA) and the correlation coefficient algorithm. First, the transient cur-rent sample signal is extracted, and the data matrix represented by the orthogonal basis function is obtained by EEMD. Then, the feature vector of the matrix element is transformed into the principal component based on PCA, and the sam-ple signal is projected into the principal component space to realize coordinate transformation, so as to obtain the clus-tering and identification results of the sample data. Finally, fault line identification is performed based on the correlation coefficient. The EEMD of the proposed algorithm reveals the internal variation law of the original historical data, while PCA can effectively select the effective fault features. A large num-ber of experiments show that the novel algorithm is accurate and effective. Compared with other existing methods, it has ad-vantages in the cases of unclear fault information and different transition resistances.
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柔性直流故障选线技术的发展对直流配电网有着至关重要的作用。本文针对现有柔性直流故障存在的可利用的故障信息较少等问题,提出了一种新算法,该算法有效利用了集合经验模态分解EEMD (ensemble empirical mode decomposition)算法、主成分分析 PCA(principal component analysis)和相关系数各自的优势。首先, 提取暂态电流样本信号,采用EEMD得到以正交基函数表示的数据矩阵;接着,基于PCA进行该矩阵元素特征向量到主成分的转换,将样本信号投影到主元空间实现坐标变换,从而得到对样本数据的聚类和识别结果;最后,基于相关系数进行故障线路判别。本文算法的EEMD揭露了原始历史数据的內在变化规律,PCA能够有效选择故障有效特征。大量实验表明,该新算法准确有效,与现有其他方法相比,在故障信息不明显、不同过渡电阻方面具有优势。
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 |
胡亚辉(1994-),男,硕士研究生。研究方向:柔性直流配电网的故障检测。E-mail: 1291849552@qq.com。 |
韦延方(1982-),男,通信作者,博士,副教授。研究方向:电力系统及其新型输配电的分析与控制。E-mail:weiyanfang@hpu.edu.cn。
王鹏(1984-),男,博士,高级工程师。研究方向:电力系统保护与控制。E-mail: 1842020235@qq.com。
王晓卫(1983-),男,博士,副教授。研究方向:配电网选线与接地。E-mail: proceedings@126.com。
曾志辉(1982-),男,博士,副教授。研究方向:信号处理、大功率开关电源技术、储能技术。E-mail: zzhh@hpu.edu.cn。
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1 河南理工大学 电气工程与自动化学院 焦作 454000)]), AuthorCompany(id=1154038586237247855, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, xref=2, ext=[AuthorCompanyExt(id=1154038586241442160, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, companyId=1154038586237247855, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 国网河南省电力公司 电力科学研究院 郑州 450052)])], figs=[ArticleFig(id=1154038597637366457, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 1, caption=
Flexible DC distribution network system, figureFileSmall=oHrsVj0oJjwmq2epskHHkQ==, figureFileBig=3EZxDhr6Oh8Snh3WqBBpfA==, tableContent=null), ArticleFig(id=1154038597691892411, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图1, caption=
柔性直流配电网络系统, figureFileSmall=oHrsVj0oJjwmq2epskHHkQ==, figureFileBig=3EZxDhr6Oh8Snh3WqBBpfA==, tableContent=null), ArticleFig(id=1154038597750612668, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 2, caption=
Positive transient current, figureFileSmall=SD3D0/1upKVGXTkEhCNrxQ==, figureFileBig=a9RTzk3aRWDgg36iVJ7BzA==, tableContent=null), ArticleFig(id=1154038597809332926, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图2, caption=
正极暂态电流, figureFileSmall=SD3D0/1upKVGXTkEhCNrxQ==, figureFileBig=a9RTzk3aRWDgg36iVJ7BzA==, tableContent=null), ArticleFig(id=1154038597876441792, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 3, caption=
Comparison of time-domain diagram of current before and after fault, figureFileSmall=etzs2aG/Gz2b7EaCdqI9ng==, figureFileBig=cMaNV7/UzwfnQIZPi1cXsw==, tableContent=null), ArticleFig(id=1154038597939356354, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图3, caption=
故障前后电流时域图对比, figureFileSmall=etzs2aG/Gz2b7EaCdqI9ng==, figureFileBig=cMaNV7/UzwfnQIZPi1cXsw==, tableContent=null), ArticleFig(id=1154038597993882307, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 4, caption=
Graph of current with ${CP1}$ and ${CP2}$ as coordinates calculated by PCA before and after fault, figureFileSmall=pTuFSb3LYIoxjL16Xdk0vw==, figureFileBig=6YD2eRhmJE6HDYYnq7l/aw==, tableContent=null), ArticleFig(id=1154038598052602566, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图4, caption=
故障前后电流经过 PCA 计算后以 ${CP1}\text{、}{CP2}$ 为坐标的图形, figureFileSmall=pTuFSb3LYIoxjL16Xdk0vw==, figureFileBig=6YD2eRhmJE6HDYYnq7l/aw==, tableContent=null), ArticleFig(id=1154038598111322825, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 5, caption=
Two-dimensional graph generated by two samples, figureFileSmall=MSM1DFox6Q7A52vUUsn8DQ==, figureFileBig=6VVnR+afgJd6ZXsSAc2sCg==, tableContent=null), ArticleFig(id=1154038598165848780, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图5, caption=
两个样本生成的二维图形, figureFileSmall=MSM1DFox6Q7A52vUUsn8DQ==, figureFileBig=6VVnR+afgJd6ZXsSAc2sCg==, tableContent=null), ArticleFig(id=1154038598211986126, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 6, caption=
Flow chart of combination method for fault line selection, figureFileSmall=SLKK8nTNXykxuKS3cRvL9g==, figureFileBig=JP/EyfCk9SwfrxPH6BvrMw==, tableContent=null), ArticleFig(id=1154038598274900693, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图6, caption=
故障选线组合方法流程, figureFileSmall=SLKK8nTNXykxuKS3cRvL9g==, figureFileBig=JP/EyfCk9SwfrxPH6BvrMw==, tableContent=null), ArticleFig(id=1154038598346203867, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 7, caption=
Comparative analysis of calculation results in Tabs. 3 and 6 obtained using novel algorithm and correlation coefficient algorithm under different transition resistances, figureFileSmall=RUseV3y5isgwdUuxZ+5uzA==, figureFileBig=5J6KiPNf6nyJpJ2B3xrJBA==, tableContent=null), ArticleFig(id=1154038598404924129, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图7, caption=
新算法与相关系数算法在不同过渡电阻下表3 和表6 计算结果对比分析, figureFileSmall=RUseV3y5isgwdUuxZ+5uzA==, figureFileBig=5J6KiPNf6nyJpJ2B3xrJBA==, tableContent=null), ArticleFig(id=1154038598467838697, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Fig. 8, caption=
Waveforms of flexible DC distribution network under different transition resistances, figureFileSmall=jSq4G4h0rIYKarC/mbmRDw==, figureFileBig=PtFEnQbylkMDKMFxyGg/Iw==, tableContent=null), ArticleFig(id=1154038598564307694, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=图8, caption=
柔性直流配电网在不同过渡电阻下波形, figureFileSmall=jSq4G4h0rIYKarC/mbmRDw==, figureFileBig=PtFEnQbylkMDKMFxyGg/Iw==, tableContent=null), ArticleFig(id=1154038598639805173, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 1, caption=
Simulation parameters, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统仿真参数 | 数值 | 系统仿真参数 | 数值 |
| 直流侧电压/kV | 10 | 直流线路电阻$r\left({\Omega /\mathrm{{km}}}\right)$ | 0.015 |
| 额定容量/MVA | 50 | 直流线路电感(mH/km) | 0.792 |
| 交流电抗器/H | 0.03 | 直流线路对地电容 (pF/km) | 14.4 |
| 直流电容/F | 0.01 | 直流线路长度$l/\mathrm{{km}}$ | 10 |
), ArticleFig(id=1154038598711108345, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表1, caption=
仿真参数, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统仿真参数 | 数值 | 系统仿真参数 | 数值 |
| 直流侧电压/kV | 10 | 直流线路电阻$r\left({\Omega /\mathrm{{km}}}\right)$ | 0.015 |
| 额定容量/MVA | 50 | 直流线路电感(mH/km) | 0.792 |
| 交流电抗器/H | 0.03 | 直流线路对地电容 (pF/km) | 14.4 |
| 直流电容/F | 0.01 | 直流线路长度$l/\mathrm{{km}}$ | 10 |
), ArticleFig(id=1154038598799188734, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 2, caption=
Results of contribution data, figureFileSmall=null, figureFileBig=null, tableContent=
| 主成分 | 特征值 | 贡献率/% | 累积贡献率/% |
| ${CP1}$ | 761855 | 78.7 | 78.7 |
| ${CP2}$ | 198465 | 20.5 | 99.2 |
| ${CP3}$ | 7932 | 0.8 | 100 |
| ${CP4}$ | 263 | 0 | 100 |
), ArticleFig(id=1154038598857908992, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表2, caption=
贡献度数据结果, figureFileSmall=null, figureFileBig=null, tableContent=
| 主成分 | 特征值 | 贡献率/% | 累积贡献率/% |
| ${CP1}$ | 761855 | 78.7 | 78.7 |
| ${CP2}$ | 198465 | 20.5 | 99.2 |
| ${CP3}$ | 7932 | 0.8 | 100 |
| ${CP4}$ | 263 | 0 | 100 |
), ArticleFig(id=1154038598925017858, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 3, caption=
Tests with transition resistance of ${0.1\Omega }$, ${1\Omega }$, and ${10\Omega }$, figureFileSmall=null, figureFileBig=null, tableContent=
| 过渡电阻/Ω | 正/负极线路 | 故障线路 | 相关系数计算结果(阈值 0.5) | 结果 |
| 0.1 | 正 | 是 | -0.7987<0.5(小于) | 故障 |
| 负 | 否 | 0.5595>0.5(大于) | 正常 |
| 1 | 正 | 是 | -0.4964<0.5(小于) | 故障 |
| 负 | 否 | 0.7432>0.5(大于) | 正常 |
| 10 | 正 | 是 | 0.2058<0.5(小于) | 故障 |
| 负 | 否 | 0.9280>0.5(大于) | 正常 |
), ArticleFig(id=1154038598979543813, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表3, caption=
${0.1\Omega }$ 、 ${1\Omega }$ 、 ${10\Omega }$ 过渡电阻测试, figureFileSmall=null, figureFileBig=null, tableContent=
| 过渡电阻/Ω | 正/负极线路 | 故障线路 | 相关系数计算结果(阈值 0.5) | 结果 |
| 0.1 | 正 | 是 | -0.7987<0.5(小于) | 故障 |
| 负 | 否 | 0.5595>0.5(大于) | 正常 |
| 1 | 正 | 是 | -0.4964<0.5(小于) | 故障 |
| 负 | 否 | 0.7432>0.5(大于) | 正常 |
| 10 | 正 | 是 | 0.2058<0.5(小于) | 故障 |
| 负 | 否 | 0.9280>0.5(大于) | 正常 |
), ArticleFig(id=1154038599080207110, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 4, caption=
Tests with different white noises, figureFileSmall=null, figureFileBig=null, tableContent=
| 信噪比 | 正/负极 线路 | 故障 线路 | 相关系数计算结果 (阈值 0.5 ) | 结果 |
| 30 | 正 | 是 | $-{0.4613}< {0.5}$ (小于) | 故障 |
| 负 | 否 | 0.7440>0.5 (大于) | 正常 |
| 40 | 正 | 是 | -0.4490<0.5(小于) | 故障 |
| 负 | 否 | 0.7422>0.5(大于) | 正常 |
| 50 | 正 | 是 | -0.3595<0.5(小于) | 故障 |
| 负 | 否 | 0.7391>0.5(大于) | 正常 |
), ArticleFig(id=1154038599147315975, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表4, caption=
白噪声测试, figureFileSmall=null, figureFileBig=null, tableContent=
| 信噪比 | 正/负极 线路 | 故障 线路 | 相关系数计算结果 (阈值 0.5 ) | 结果 |
| 30 | 正 | 是 | $-{0.4613}< {0.5}$ (小于) | 故障 |
| 负 | 否 | 0.7440>0.5 (大于) | 正常 |
| 40 | 正 | 是 | -0.4490<0.5(小于) | 故障 |
| 负 | 否 | 0.7422>0.5(大于) | 正常 |
| 50 | 正 | 是 | -0.3595<0.5(小于) | 故障 |
| 负 | 否 | 0.7391>0.5(大于) | 正常 |
), ArticleFig(id=1154038599214424840, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 5, caption=
Tests when faulty distances are $3\mathrm{\;{km}}$ and $7\mathrm{\;{km}}$, respectively, figureFileSmall=null, figureFileBig=null, tableContent=
| 距离/$\mathrm{{km}}$ | 正/负极 线路 | 故障 线路 | 阈值 (0.5) | 结果 |
| 3 | 正 | 是 | -0.3371<0.5(小于) | 故障 |
| 负 | 否 | 0.7562>0.5(大于) | 正常 |
| 7 | 正 | 是 | -0.5188<0.5(小于) | 故障 |
| 负 | 否 | 0.5132>0.5(大于) | 正常 |
), ArticleFig(id=1154038599302505225, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表5, caption=
$\;3\mathrm{\;{km}}$ 、 $7\mathrm{\;{km}}$ 处测试, figureFileSmall=null, figureFileBig=null, tableContent=
| 距离/$\mathrm{{km}}$ | 正/负极 线路 | 故障 线路 | 阈值 (0.5) | 结果 |
| 3 | 正 | 是 | -0.3371<0.5(小于) | 故障 |
| 负 | 否 | 0.7562>0.5(大于) | 正常 |
| 7 | 正 | 是 | -0.5188<0.5(小于) | 故障 |
| 负 | 否 | 0.5132>0.5(大于) | 正常 |
), ArticleFig(id=1154038599373808394, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 6, caption=
Test at sampling frequency of ${160}\mathrm{{kHz}}$, figureFileSmall=null, figureFileBig=null, tableContent=
| 采样频 率/kHz | 过渡 电阻/Ω | 正/负极 线路 | 故障 线路 | 相关系数计算结果 (阈值 0.5 ) | 结果 |
| 160 | 0.1 | 正 | 是 | .1628<0.5(小于) | 故障 |
| 负 | 否 | 0.97559>0.5(大于) | 正常 |
| 1 | 正 | 是 | 0.34993<0.5(小于) | 故障 |
| 负 | 否 | 0.9672>0.5(大于) | 正常 |
| 10 | 正 | 是 | -0.832$8 <{0.5}$ (小于) | 故障 |
| 负 | 否 | 9343>0.5(大于) | 正常 |
), ArticleFig(id=1154038599461888779, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表6, caption=
160 kHz 采样频率测试, figureFileSmall=null, figureFileBig=null, tableContent=
| 采样频 率/kHz | 过渡 电阻/Ω | 正/负极 线路 | 故障 线路 | 相关系数计算结果 (阈值 0.5 ) | 结果 |
| 160 | 0.1 | 正 | 是 | .1628<0.5(小于) | 故障 |
| 负 | 否 | 0.97559>0.5(大于) | 正常 |
| 1 | 正 | 是 | 0.34993<0.5(小于) | 故障 |
| 负 | 否 | 0.9672>0.5(大于) | 正常 |
| 10 | 正 | 是 | -0.832$8 <{0.5}$ (小于) | 故障 |
| 负 | 否 | 9343>0.5(大于) | 正常 |
), ArticleFig(id=1154038599516414732, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 7, caption=
Parameters of DC distribution system containing MMC, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统仿真参数 | 数值 |
| 额定直流电压/kV | 30 |
| MMC 额定容量/MVA | 20 |
| 子模块电容值/mF | 1 |
| 子模块投切周期/μs | 500 |
| 桥臂子模块数量 | 4 |
| 桥臂电抗值/mH | 6 |
| 线路长度/km | 20 |
), ArticleFig(id=1154038599575134989, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表7, caption=
含 MMC 直流配电系统参数, figureFileSmall=null, figureFileBig=null, tableContent=
| 系统仿真参数 | 数值 |
| 额定直流电压/kV | 30 |
| MMC 额定容量/MVA | 20 |
| 子模块电容值/mF | 1 |
| 子模块投切周期/μs | 500 |
| 桥臂子模块数量 | 4 |
| 桥臂电抗值/mH | 6 |
| 线路长度/km | 20 |
), ArticleFig(id=1154038599633855247, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 8, caption=
Simulation test, figureFileSmall=null, figureFileBig=null, tableContent=
| 信噪 | 过渡 | 正/负极 | 故障 | 相关系数计算 | 结果 |
| 比/dB | 电阻/Ω | 线路 | 线路 | 结果 (阈值 0.5 ) |
| 30 | 0.1 | 正 | 是 | 0.3550<0.5(小于) | 故障 |
| 负 | 否 | 0.5111>0.5(大于) | 正常 |
| 1 | 正 | 是 | 0.3092<0.5(小于) | 故障 |
| 负 | 否 | 0.5037>0.5(大于) | 正常 |
| 40 | 0.1 | 正 | 是 | 0.3557<0.5(小于) | 故障 |
| 负 | 否 | 0.5112>0.5(大于) | 正常 |
| 1 | 正 | 是 | 0.3111<0.5(小于) | 故障 |
| 负 | 否 | 0.5034>0.5(大于) | 正常 |
), ArticleFig(id=1154038599692575504, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表8, caption=
仿真测试, figureFileSmall=null, figureFileBig=null, tableContent=
| 信噪 | 过渡 | 正/负极 | 故障 | 相关系数计算 | 结果 |
| 比/dB | 电阻/Ω | 线路 | 线路 | 结果 (阈值 0.5 ) |
| 30 | 0.1 | 正 | 是 | 0.3550<0.5(小于) | 故障 |
| 负 | 否 | 0.5111>0.5(大于) | 正常 |
| 1 | 正 | 是 | 0.3092<0.5(小于) | 故障 |
| 负 | 否 | 0.5037>0.5(大于) | 正常 |
| 40 | 0.1 | 正 | 是 | 0.3557<0.5(小于) | 故障 |
| 负 | 否 | 0.5112>0.5(大于) | 正常 |
| 1 | 正 | 是 | 0.3111<0.5(小于) | 故障 |
| 负 | 否 | 0.5034>0.5(大于) | 正常 |
), ArticleFig(id=1154038599801627409, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=EN, label=Tab. 9, caption=
Calculation results by correlation coefficient algorithm under different transition resistances, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法 对比 | 过渡 电阻/Ω | 正/负极 线路 | 故障 线路 | 计算结果 | 结果 |
| 直流 应用 相关 系数 | 0.1 | 正 | 是 | -0.8007<0.5(小于) | 故障 |
| 负 | 否 | 0.5800>0.5(大于) | 正常 |
| 1 | 正 | 是 | -0.2777<0.5(小于) | 故障 |
| 负 | 否 | 0.7798>0.5(大于) | 正常 |
| 10 | 正 | 是 | .9135<0.5(大于) | 识别 错误 |
| 负 | 否 | 0.9768>0.5(大于) | 正常 |
| EEMD +相关 系数 | 0.1 | 正 | 是 | 0.3437<0.9300 (小于) | 故障 |
| 负 | 否 | 0.9469>0.9300(大于) | 正常 |
| 1 | 正 | 是 | 0.6974<0.9300(小于) | 故障 |
| 负 | 否 | 0.9799>0.9300(大于) | 正常 |
| 10 | 正 | 是 | 0.9222<0.9300(小于) | 故障 |
| 负 | 否 | 0.9745>0.9300(大于) | 正常 |
| PCA+ 相关 系数 | 0.1 | 正 | 是 | 0.3438<0.9300(小于) | 故障 |
| 负 | 否 | 0.9442>0.9300(大于) | 正常 |
| 1 | 正 | 是 | 0.6977<0.9300(小于) | 故障 |
| 负 | 否 | 0.9800>0.9300(大于) | 正常 |
| 10 | 正 | 是 | 0.9222<0.9300(小于) | 故障 |
| 负 | 否 | 0.9815>0.9300(大于) | 正常 |
), ArticleFig(id=1154038599881319187, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154038483686515434, language=CN, label=表9, caption=
相关系数算法在不同过渡电阻下的计算结果, figureFileSmall=null, figureFileBig=null, tableContent=
| 方法 对比 | 过渡 电阻/Ω | 正/负极 线路 | 故障 线路 | 计算结果 | 结果 |
| 直流 应用 相关 系数 | 0.1 | 正 | 是 | -0.8007<0.5(小于) | 故障 |
| 负 | 否 | 0.5800>0.5(大于) | 正常 |
| 1 | 正 | 是 | -0.2777<0.5(小于) | 故障 |
| 负 | 否 | 0.7798>0.5(大于) | 正常 |
| 10 | 正 | 是 | .9135<0.5(大于) | 识别 错误 |
| 负 | 否 | 0.9768>0.5(大于) | 正常 |
| EEMD +相关 系数 | 0.1 | 正 | 是 | 0.3437<0.9300 (小于) | 故障 |
| 负 | 否 | 0.9469>0.9300(大于) | 正常 |
| 1 | 正 | 是 | 0.6974<0.9300(小于) | 故障 |
| 负 | 否 | 0.9799>0.9300(大于) | 正常 |
| 10 | 正 | 是 | 0.9222<0.9300(小于) | 故障 |
| 负 | 否 | 0.9745>0.9300(大于) | 正常 |
| PCA+ 相关 系数 | 0.1 | 正 | 是 | 0.3438<0.9300(小于) | 故障 |
| 负 | 否 | 0.9442>0.9300(大于) | 正常 |
| 1 | 正 | 是 | 0.6977<0.9300(小于) | 故障 |
| 负 | 否 | 0.9800>0.9300(大于) | 正常 |
| 10 | 正 | 是 | 0.9222<0.9300(小于) | 故障 |
| 负 | 否 | 0.9815>0.9300(大于) | 正常 |
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