基于决策树的电网重要用户供电路径决策方法  

Decision-making method of power supply path for critical loads based on decision tree

作　　者：郭挺 杨悦荣 徐良德 陈中豪 董红 杨梓晴 林舜江[2] 刘明波[2] GUO Ting;YANG Yuerong;XU Liangde;CHEN Zhonghao;DONG Hong;YANG Ziqing;LIN Shunjiang;LIU Mingbo(Guangzhou Power Supply Company,Guangdong Power Grid Co.,Ltd.,Guangzhou 510600,China;School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]广东电网有限责任公司广州供电局,广东广州510600 [2]华南理工大学电力学院,广东广州510640

出　　处：《电力科学与技术学报》2024年第2期53-63,共11页Journal of Electric Power Science And Technology

基　　金：南方电网公司科技项目(GZHKJXM20210047)。

摘　　要：广州等超大城市电网中110kV网架接线主要为3T接线,其运行方式多变,对电网的规划和运行有很大影响。超大城市电网中存在着大量的重要用户,其供电可靠性是安排电网运行方式的一个重要考虑因素。若安排的运行方式使得某些重要用户的供电路径汇集在同一元件,就会大大降低重要用户的供电可靠性。基于此,建立超大城市电网重要用户供电路径优化决策模型,以最小化电网中220kV线路的平均负载率为目标,要求系统的每个重要用户都要满足多个供电路径来自最少2个不同的220kV变电站。为了快速求解此混合整数非线性规划模型,引入多变量决策树将模型转化成一个整数非线性规划问题,再通过变量代换将其转化为一个整数线性规划问题,实现快速准确求解。最后,以广州电网实际数据为例,验证所提优化决策模型和求解方法的可行性与有效性。The power grid of megacities like Guangzhou mainly adopts a 3T wiring configuration for its 110 kV network,and its operation modes are highly variable,significantly impacting power grid planning and operation.Given the presence of numerous critical users in the megacity power grid,their power supply reliability is a crucial factor in determining the operational approach.If the arranged operation mode concentrates the power supply paths of certain essential users on the same component,it can drastically reduce the reliability of power supply for these users.An optimized decision model for power supply paths of critical users in megacity power grids is hence established.The objective is to minimize the average load factor of 220 kV lines in the grid,with the requirement that each essential user must have multiple power supply paths originating from at least two different 220 kV substations.To solve this mixed-integer nonlinear programming model quickly,a multivariate decision tree to transform the model into an integer nonlinear programming problem is introduced;subsequently,it is converted into an integer linear programming problem through variable substitution,enabling fast and accurate solutions.Finally,the feasibility and effectiveness of the proposed optimized decision model and solution method are validated using actual data from the Guangzhou power grid.

关 键 词：重要用户 供电路径 3T接线 多变量决策树 线路负载率 

分 类 号：TM732[电气工程—电力系统及自动化]