基于改进极限梯度提升算法的配电网合环转供电影响因素评估  

Influencing Factors Assessment of Power Transfer from Loop Closing in Distribution Network Based on XGBoost Algorithm

作　　者：纪焕聪 夏成军[1,2] 赖胜杰 王泽青 刘祎峰 JI Huancong;XIA Chengjun;LAI Shengjie;WANG Zeqing;LIU Yifeng(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System,Guangzhou 510663,China)

机构地区：[1]华南理工大学电力学院,广州510640 [2]广东省新能源电力系统智能运行与控制企业重点实验室,广州510663

出　　处：《南方电网技术》2023年第6期18-25,共8页Southern Power System Technology

基　　金：国家重点研发计划资助项目(2022YFB2403500);广东省重点领域研发计划资助项目(2019B111109001)。

摘　　要：合环电流大小与母线电压幅值差、相角差、环路阻抗等因素有关,而各因素重要程度不清晰,合环电流调控缺乏针对性。为此,提出一种基于改进极限梯度提升(extreme gradient boosting,XGBoost)算法的配电网合环转供电影响因素评估方法,以得出各影响因素的权重大小并采取针对性措施。首先,结合实际配电网的特点,确定影响合环电流大小的特征因素集;然后,基于PSCAD/EMTDC仿真软件搭建配电网合环模型,改变参数取值以获取大量样本数据;最后,利用XGBoost算法对样本数据进行训练,得出合环电流影响因素的权重排序。研究结果表明,各因素优先级排序为:母线电压相角差>环路阻抗>综合负荷大小>母线电压幅值差>综合负荷分布,按此制定相应的合环电流调控策略,实现配电网精细化管理,对电网调度运行具有一定的借鉴价值。The loop closing current is related to the bus voltage amplitude difference,phase angle difference,loop impedance and other factors,but the importance of each factor is not clear,and the closed loop current regulation lacks pertinence.For this reason,a method for evaluating the influencing factors of the power transfer from loop closing in the distribution network based on the extreme gradient boosting(XGBoost)algorithm is proposed to obtain the weight of each influencing factor and take targeted measures.Firstly,combined with the characteristics of the actual distribution network,the characteristic factor set that affects the size of the closed loop current is determined.Then,a closed loop model of the distribution network based on PSCAD/EMTDC is built,and the parameter values are changed to obtain a large number of sample data.Finally,the XGBoost algorithm is used to train the sample data to obtain the weight ranking of the factors affecting the loop closing current.The research results show that the priority of each factor is:phase angle difference>loop impedance>comprehensive load size>bus voltage amplitude difference>comprehensive load distribution.Based on this,corresponding loop closing current regulation strategies are formulated to achieve refined management of the distribution network,which has certain reference value for the dispatch and operation of the power grid.

关 键 词：改进极限梯度提升算法 合环电流 影响因素 权重分析 

分 类 号：TM743[电气工程—电力系统及自动化]