电缆配电网的线-变-表拓扑异常辨识方法
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摘要
线-变-表拓扑异常是造成分线线损率统计值不合理的一个主要原因。同时考虑到部分分线涉及的设备量较多、异常情况复杂,仅靠现场排查难度很大。为了克服这一难题,针对电缆配电网接线方式,提出了一种线-变-表拓扑异常辨识方法。为了保证分析的客观性,基于分线线损率计算公式,分析了拓扑异常对线损率的影响,并分别针对单环式和双射式两种基本的电缆配电网接线方式,提炼了相应的拓扑异常类型。为了提高现场排查效率,推导了不同异常类型情况下线损率实际值与统计值的关系式,并提出了拓扑异常辨识方法,能够在现场核查前预判出异常原因。最后,通过实际算例计算,验证了所提方法的有效性。
The line-transformer-meter topology anomaly is a major reason for unreasonable statistical value of line loss rate. Taking into account that the equipment involved in the part of lines is more and abnormal situation is complex, it is very difficult to find out the reason only by on-site inspection method. To overcome this problem, a method of line-variable-table topology anomaly identification for cable distribution network connection is presented in this paper. To ensure the objectivity of analysis, the influence of topology anomaly on the line loss rate is analyzed based on the calculation formula of the line loss rate, and the corresponding topology anomaly types are refined for the single-loop wiring and bi-directional wiring. To improve the efficiency of site investigation work, the relationship between the actual value and the statistical value of line loss rate under different types of anomalies is deduced, and a method of identifying topological anomalies is proposed to predict the anomalies before the on-site inspection. Finally, a numerical example is presented to verify the validity of the method.
The line-transformer-meter topology anomaly is a major reason for unreasonable statistical value of line loss rate. Taking into account that the equipment involved in the part of lines is more and abnormal situation is complex, it is very difficult to find out the reason only by on-site inspection method. To overcome this problem, a method of line-variable-table topology anomaly identification for cable distribution network connection is presented in this paper. To ensure the objectivity of analysis, the influence of topology anomaly on the line loss rate is analyzed based on the calculation formula of the line loss rate, and the corresponding topology anomaly types are refined for the single-loop wiring and bi-directional wiring. To improve the efficiency of site investigation work, the relationship between the actual value and the statistical value of line loss rate under different types of anomalies is deduced, and a method of identifying topological anomalies is proposed to predict the anomalies before the on-site inspection. Finally, a numerical example is presented to verify the validity of the method.
引文
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[2]刘盛,朱翠艳.应用数据挖掘技术构建反窃电管理系统的研究[J].中国电力,2017,50(10):181-184.LIU Sheng,ZHU Cuiyan.Application of data mining technology to build the anti-stealing management system[J].Electric Power,2017,50(10):181-184.
[3]王守相,周凯,苏运,等.基于随机森林算法的台区合理线损率估计方法[J].电力自动化设备,2017,37(11):39-45.WANG Shouxiang,ZHOU Kai,SU Yun,et al.Line loss rate estimation method of transformer district based on random forest algorithm[J].Electric Power Automation Equipment,2017,37(11):39-45.
[4]李滨,刘铸峰,黄柳军,等.县级电网线损管理综合对标评价[J].电网技术,2016,40(12):3871-3879.LI Bin,LIU Zhufeng,HUANG Liujun,et al.Comprehensive evaluation benchmark study on line loss management of county power grids[J].Power System Technology,2016,40(12):3871-3879.
[5]李健,黄俊铭,朱建全,等.基于过程状态特征化的配电网线损计算[J].电力系统保护与控制,2017,45(10):55-61.LI Jian,HUANG Junming,ZHU Jianquan,et al.Line loss calculation for distribution network based on state characterization[J].Power System Protection and Control,2017,45(10):55-61.
[6]李端超,王松,黄太贵,等.基于大数据平台的电网线损与窃电预警分析关键技术[J].电力系统保护与控制,2018,46(5):143-151.LI Duanchao,WANG Song,HUANG Taigui,et al.Key technologies of line loss and stealing electricity prediction analysis based on big data platform[J].Power System Protection and Control,2018,46(5):143-151.
[7]安佳坤,贺春光,邵华,等.一种面向时空全过程的线损变动分析方法[J].电力科学与技术学报,2017,32(3):100-105.AN Jiakun,HE Chunguang,SHAO Hua,et al.Analysis method of line loss fluctuation based on whole space-time process[J].Journal of Electric Power Science and Technology,2017,32(3):100-105.
[8]章元德,史亮,陆薇,等.线损信息化统计中数据质量管控机制及实现[J].电力系统自动化,2016,40(7):128-133.ZHANG Yuande,SHI Liang,LU Wei,et al.Realization of data management and control mechanism of line loss statistical information[J].Automation of Electric Power Systems,2016,40(7):128-133.
[9]应俊,梅军,王勇.配电主站馈线拓扑模型校核方法研究[J].电力系统保护与控制,2018,46(7):83-89.YING Jun,MEI Jun,WANG Yong.Research on verification method of feeder topology model for distribution main station[J].Power System Protection and Control,2018,46(7):83-89.
[10]于金镒,刘健,徐立.大型城市核心区配电网高可靠性接线模式及故障处理策略[J].电力系统自动化,2014,38(20):74-80.YU Jinyi,LIU Jian,XU Li.Distribution grids of high reliability for core areas of large cities[J].Automation of Electric Power Systems,2014,38(20):74-80.
[11]刘亮,曾祥君,邓名高,等.基于线路归一和网络解耦的配网故障测距方法[J].仪器仪表学报,2018,39(1):243-249.LIU Liang,ZENG Xiangjun,DENG Minggao,et al.Fault distance measurement method in distribution network based on line normalization and network decoupling[J].Chinese Journal of Scientific Instrument,2018,39(1):243-249.
[12]MANSOR N N,LEVI V.Integrated Planning of distribution networks considering utility planning concepts[J].IEEE Transactions on Power Systems,2017,32(6):4656-4672.
[13]杨继超,李文升,韩颖,等.电缆线路对城市配网变电站无功影响研究[J].电力系统保护与控制,2016,44(16):143-148.YANG Jichao,LI Wensheng,HAN Ying,et al.Research on the effects of cable on the reactive power of urban distribution network[J].Power System Protection and Control,2016,44(16):143-148.
[14]孙伟华,梁震,王国友.上海市区电网现状分析与智能化应用对策[J].华东电力,2012,40(10):1820-1823.SUN Weihua,LIANG Zhen,WANG Guoyou.Analysis of urban power grid in shanghai and intelligent application countermeasures[J].East China Electric Power,2012,40(10):1820-1823.
[15]WANG Longchang,GAO Houlei,ZOU Guibin.Modeling methodology and fault simulation of distribution networks integrated with inverter-based DG[J].Protection and Control of Modern Power Systems,2017,2(2):370-378.DOI:10.1186/s41601-017-0058-9.
[16]姚瑛,王浩鸣,周亚楠,等.中压配电网典型接线方式分析[J].供用电,2017,34(11):55-61.YAO Ying,WANG Haoming,ZHOU Yanan,et al.Analysis of the typical connection modes of medium voltage distribution network[J].Distribution&Utilization,2017,34(11):55-61.
[17]MATEO C,PRETTICO G,GOMEZ T,et al.European representative electricity distribution networks[J].Electrical Power and Energy Systems,2018,99:4656-4672.
[18]吴奕姣,张焰,华月申.中压配电网闭环运行的可靠性评估方法研究[J].水电能源科学,2017,35(3):199-203.WU Yijiao,ZHANG Yan,HUA Yueshen.Study on reliability evaluation method of closed-loop operation in MV distribution network[J].Water Resources and Power,2017,35(3):199-203.
[19]肖峻,刚发运,蒋迅,等.柔性配电网:定义、组网形态与运行方式[J].电网技术,2017,41(5):1435-1442.XIAO Jun,GANG Fayun,JIANG Xun,et al.Flexible distribution network:definition,morphology and operation mode[J].Power System Technology,2017,41(5):1435-1442.
[20]刘健,张志华,张小庆,等.配电网模式化故障处理方法研究[J].电网技术,2011,35(11):97-102.LIU Jian,ZHANG Zhihua,ZHANG Xiaoqing,et al.Modeled fault isolation and restoration for distribution systems[J].Power System Technology,2011,35(11):97-102.