基于3CPEM的主动配电网10 kV馈线合环电流评估方法  

A 10 kV feeder loop closing current evaluation method for active distribution network based on 3CPEM

作　　者：黄跃 高强 荣娜[1] 陈世威 周涛 HUANG Yue;GAO Qiang;RONG Na;CHEN Shiwei;ZHOU Tao(Department of Electrical Engineering,Guizhou University,Guiyang 550025,China;State Grid Liaoning Electric Power Company Limited Dandong Power Supply Company,Dandong 118000,China;Bijie Power Supply Bureau,Guizhou Power Grid Co.,Ltd.,Bijie 551700,China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025 [2]国网辽宁省电力有限公司丹东供电公司,辽宁丹东118000 [3]贵州电网有限责任公司毕节供电局,贵州毕节551700

出　　处：《供用电》2025年第2期22-28,37,共8页Distribution & Utilization

基　　金：贵州省优秀青年科技人才项目资助(黔科合平台人才〔2021〕5645);贵州省科技支撑计划项目(〔2023〕290)。

摘　　要：分布式能源出力的随机性对主动配电网馈线合环电流的准确计算产生了影响。为提高合环电流计算的准确性,从融入分布式能源出力与负荷变量之间相关性的角度,提出了基于Cholesky分解的三点估计法(Cholesky three-point estimate method,3CPEM)计算主动配电网馈线合环电流。该方法利用Cholesky分解处理输入变量之间的相关性,再通过三点估计法(three-poit estimate method,3PEM)计算合环电流的累积概率分布。仿真表明,3CPEM比3PEM的计算误差更小、用时更短,可为主动配电网馈线合环辅助决策提供参考。The stochastic nature of distributed energy output affects the accurate calculation of active distribution grid feeder combined loop current.In order to improve the accuracy of combined loop current calculation,this paper proposes a three-point estimation method based on Cholesky decomposition to calculate the combined loop current of active distribution grid feeder from the perspective of incorporating the correlation between distributed energy output and load variables.The method utilizes Cholesky decomposition to deal with the correlation between the input variables,and then calculates the cumulative probability distribution of the loop closing current by the three-point estimation method.The simulation shows that 3CPEM can provide a reference for active distribution feeder loop closing decision-making with smaller computational error and shorter time compared with the 3PEM method.

关 键 词：配电网 合环操作 分布式能源 CHOLESKY分解 三点估计法 合环电流评估指标 

分 类 号：TM71[电气工程—电力系统及自动化]