Article(id=1190568680271528129, tenantId=1146029695717560320, journalId=1189987059142926344, issueId=1190568677100630212, articleNumber=null, orderNo=null, doi=10.19457/j.1001-2095.dqcd25613, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1705593600000, receivedDateStr=2024-01-19, revisedDate=1712073600000, revisedDateStr=2024-04-03, acceptedDate=null, acceptedDateStr=null, onlineDate=1761783293069, onlineDateStr=2025-10-30, pubDate=1750348800000, pubDateStr=2025-06-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761783293069, onlineIssueDateStr=2025-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761783293069, creator=13701087609, updateTime=1761783293069, updator=13701087609, issue=Issue{id=1190568677100630212, tenantId=1146029695717560320, journalId=1189987059142926344, year='2025', volume='55', issue='6', pageStart='3', pageEnd='96', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1761783292313, creator=13701087609, updateTime=1761785145031, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1190576448026063162, tenantId=1146029695717560320, journalId=1189987059142926344, issueId=1190568677100630212, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1190576448026063163, tenantId=1146029695717560320, journalId=1189987059142926344, issueId=1190568677100630212, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=64, endPage=71, ext={EN=ArticleExt(id=1190568680535769282, articleId=1190568680271528129, tenantId=1146029695717560320, journalId=1189987059142926344, language=EN, title=Research on Optimal Estimation Method of Technical Line Loss in Low Voltage Station Area Based on Improved Gradient Descent, columnId=null, journalTitle=Electric Drive, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The traditional technical line loss prediction method of low voltage station area has some problems,such as relatively extensive calculation,requiring underlying physical topology,and relying on influence characteristic data. In recent years,a technical line loss and meter error joint estimation technical route based on the principle of conservation of electric energy in station area has been formed,but there are still some problems of difficult model solving and long data requirement period. In order to achieve accurate estimation of technical line loss in low voltage station area,the correlation between daily technical line loss and energy supply was further analyzed on the basis of the existing joint estimation route,and the original model was optimized considering those users with small energy consumption have little influence on the model,and the technical line loss was solved based on gradient descending convex optimization algorithm. Finally,6 759 stations in a certain area were used to calculate the technical line loss. Compared with the traditional algorithm,the assignment accuracy of the proposed method reaches 98%,and is significantly improved.
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传统的低压台区技术线损预测方法存在计算相对粗放、需要底层物理拓扑、依赖影响特征数据等问题,近些年已形成一条基于台区电能量守恒原理的技术线损-表计抄差联合估计技术路线,但仍存在模型求解难度大、数据需求周期长等问题。为了实现低压台区技术线损的精准估计,在现有技术线损-表计抄差联合估计路线基础上进一步分析台区每日技术线损与台区供电量之间的关联关系,考虑小电量用户对模型影响很小的特点,对原有模型进行优化,并基于改进梯度下降算法完成台区技术线损的求解。最终以某地区的6 759个台区为案例,应用本方法完成技术线损的计算。和传统算法相比较,所提方法赋值准确率达到98%,计算精度得到明显提升。
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1 国网江苏省电力有限公司 南京供电分公司,江苏 南京 210000, bio={"content":"
方磊(1991—),男,博士,高级工程师,主要研究方向为电能计量、光伏发电、智能车联网及能源互联网技术,Email:Mrfanglei@foxmail.com
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39(3):617-627,671., articleTitle=Estimated position correction algorithm for surface-mounted permanent magnet synchronous motor based on variable gain steepest gradient, refAbstract=null)], funds=[Fund(id=1190664668365599645, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, awardId=JS2311490, language=CN, fundingSource=国网江苏省电力有限公司新技术研究项目(JS2311490), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1190664663378572127, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, xref=1, ext=[AuthorCompanyExt(id=1190664663386960736, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, companyId=1190664663378572127, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 东南大学 电气工程学院,江苏 南京 210096)])], figs=[ArticleFig(id=1190664665488307079, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.1, caption=
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低压台区采集架构, figureFileSmall=xIUFx0DOfK8iqqgZ+cOk3Q==, figureFileBig=uTwYcYzbOeUqQh6udDQyNA==, tableContent=null), ArticleFig(id=1190664665643496329, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.2, caption=
Characteristic analysis of load and line loss ratio, figureFileSmall=2syvWRShH+EySlRnSUHBIA==, figureFileBig=9Fb5hYtkZE+WLix4+qnjJg==, tableContent=null), ArticleFig(id=1190664665710605194, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=CN, label=图2, caption=
低压台区负载-线损率特性分析, figureFileSmall=2syvWRShH+EySlRnSUHBIA==, figureFileBig=9Fb5hYtkZE+WLix4+qnjJg==, tableContent=null), ArticleFig(id=1190664665790296971, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.3, caption=
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基于改进梯度下降的台区技术线损优化分析流程, figureFileSmall=xqN2+/sW0BHUMtjmtsCYnQ==, figureFileBig=tKWX1quKabx3v+C73kqWeg==, tableContent=null), ArticleFig(id=1190664665932903309, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.4, caption=
Topology grid of simulation model, figureFileSmall=KKJeGHSQzJZ/Zsz3lGXGEg==, figureFileBig=LVPe5x4Xp68zrKMR0aKSQg==, tableContent=null), ArticleFig(id=1190664666071315342, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=CN, label=图4, caption=
仿真台区拓扑网架, figureFileSmall=KKJeGHSQzJZ/Zsz3lGXGEg==, figureFileBig=LVPe5x4Xp68zrKMR0aKSQg==, tableContent=null), ArticleFig(id=1190664666138424207, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.5, caption=
Power supply distribution of simulation station area, figureFileSmall=FxOpyseRdboU6vIqSTTdcQ==, figureFileBig=NJLqMUy5624Na5o33Rsg3A==, tableContent=null), ArticleFig(id=1190664666213921680, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=CN, label=图5, caption=
仿真台区不同供电量区间内的台区数量分布, figureFileSmall=FxOpyseRdboU6vIqSTTdcQ==, figureFileBig=NJLqMUy5624Na5o33Rsg3A==, tableContent=null), ArticleFig(id=1190664666327167889, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.6, caption=
Line loss rate distribution of simulation station area, figureFileSmall=J8zH4HRNMMDyo5fKfKRybQ==, figureFileBig=wO6u8RnJlftQ0q4Ia3cFOA==, tableContent=null), ArticleFig(id=1190664666478162834, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=CN, label=图6, caption=
仿真台区不同线损率区间内的台区数量分布, figureFileSmall=J8zH4HRNMMDyo5fKfKRybQ==, figureFileBig=wO6u8RnJlftQ0q4Ia3cFOA==, tableContent=null), ArticleFig(id=1190664666583020435, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.7, caption=
Comparison of technical line loss under different global learning rate, figureFileSmall=PxLRWnfkUyfwfIBu7DkjaA==, figureFileBig=EsGZMaoyRfFhTc3EFn8Row==, tableContent=null), ArticleFig(id=1190664667707093908, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=CN, label=图7, caption=
不同全局学习率设置下技术线损结果对比, figureFileSmall=PxLRWnfkUyfwfIBu7DkjaA==, figureFileBig=EsGZMaoyRfFhTc3EFn8Row==, tableContent=null), ArticleFig(id=1190664667782591381, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Fig.8, caption=
Distribution of daily statistical line loss and technical line loss difference in pilot station area, figureFileSmall=vX+qgBA0UEIZsdAdUCVc1g==, figureFileBig=5OhArxm0v2RrSz8CFM3fPg==, tableContent=null), ArticleFig(id=1190664667845505942, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=CN, label=图8, caption=
试点台区每日统计线损与技术线损差值分布, figureFileSmall=vX+qgBA0UEIZsdAdUCVc1g==, figureFileBig=5OhArxm0v2RrSz8CFM3fPg==, tableContent=null), ArticleFig(id=1190664667904226199, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Tab.1, caption=
Parameters selection of line in station area
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| 使用位置 | 导体类型 | 长度选择/m | 电阻率/(Ω·km-1) | 电抗率/(Ω·km-1) |
| 变压器到分支线路 | MDTDL-150 | 100~300 | 0.244 | 0.079 |
分支到 用户线路 | BV-10 | 1~3 | 1.75 | 0.1 |
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台区线路参数选择
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| 使用位置 | 导体类型 | 长度选择/m | 电阻率/(Ω·km-1) | 电抗率/(Ω·km-1) |
| 变压器到分支线路 | MDTDL-150 | 100~300 | 0.244 | 0.079 |
分支到 用户线路 | BV-10 | 1~3 | 1.75 | 0.1 |
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Parameters selection of algorithm model
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| 序号 | 全局学习率α | 算法终止距离ε |
| 1 | 0.02 | 10-8 |
| 2 | 0.05 | 10-8 |
| 3 | 0.1 | 10-8 |
), ArticleFig(id=1190664668122330010, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=CN, label=表2, caption=
模型参数选择
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| 序号 | 全局学习率α | 算法终止距离ε |
| 1 | 0.02 | 10-8 |
| 2 | 0.05 | 10-8 |
| 3 | 0.1 | 10-8 |
), ArticleFig(id=1190664668185244571, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1190568680271528129, language=EN, label=Tab.3, caption=
Model prediction error and calculation time under different parameter settings
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| 全局学习率α | MAPE/% | RMSE | 计算时间t/s |
| 0.02 | 5.116 | 0.019 | 5.9 |
| 0.05 | 10.159 | 0.181 | 4.3 |
| 0.1 | 15.919 | 0.286 | 2.1 |
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不同参数设下的模型预测误差和计算时间
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| 全局学习率α | MAPE/% | RMSE | 计算时间t/s |
| 0.02 | 5.116 | 0.019 | 5.9 |
| 0.05 | 10.159 | 0.181 | 4.3 |
| 0.1 | 15.919 | 0.286 | 2.1 |
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