基于LOF和SVM的配电网线变关系数据校验方法  

Connectivity data verification method of feeder-transformers based on LOF and SVM

作　　者：耿俊成 郭志民 李晓蕾 苏娟[3] 袁少光 牛霜霞 GENG Juncheng;GUO Zhimin;LI Xiaolei;SU Juan;YUAN Shaoguang;NIU Shuangxia(Electric Power Research Institute,State Grid Henan Electric Power Company,Zhengzhou 450002,China;State Grid Henan Electric Power Company,Zhengzhou 450000,China;College of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052 [2]国网河南省电力公司,河南郑州450000 [3]中国农业大学信息电气工程学院,北京100083

出　　处：《中国测试》2021年第4期49-54,共6页China Measurement & Test

基　　金：国网河南省电力公司科技项目(52170220000N)。

摘　　要：针对配电网线变关系数据人工校验成本高、准确性差的问题,提出一种基于LOF和SVM的配电网线变关系数据校验方法。对于待校验配电线路,从用电信息采集系统提取其配电变压器最近一段时间的电压序列数据,当变压器A、B、C相电压不平衡时将其电压值归算为等效电压;基于不同变压器电压序列之间的相关距离,计算每台变压器的LOF值;统计变压器LOF值在不同区间出现的频率并作为变压器输入属性,将其线变关系数据是否正确作为其输出属性,采用支持向量机构建变压器线变关系数据研判模型,研判变压器的线变关系数据是否正确。经过验证,该方法可快速有效地校验配电网线变关系数据是否正确,有较大的推广应用价值。Aiming at the high cost and inaccuracy of the artificial connectivity data verification of feeder and transformers,a method based on local outlier factor and support vector machine is proposed.First,for a feeder extract the recent period voltage sequence of distribution transformers from the electric information acquisition system.And when the voltages of transformer A,B and C phase are unbalanced,the voltages are converted to equivalent voltage.Secondly,the correlation distance is used as the distance of different transformers voltage sequence,and then calculate the local outlier factor of each transformer voltage.Finally,The frequency of transformer LOF value in different intervals is counted as the input attribute,and the correctness of its connectivity data is taken as the output attribute,the support vector machine is used to construct the model of verifying whether the connectivity data is correct.The experiment shows that it can quickly and effectively verify the correctness of the connectivity data of feeder and transformers,and has great value in popularizing and applying.

关 键 词：电压序列 等效电压 相关距离 局部离群点因子 支持向量机 

分 类 号：TM93[电气工程—电力电子与电力传动]