基于最大流最小割的电网静态安全关键断面辨识方法  

Identification of Key Transmission Sections for Power System Static Security Based on Maximum Flow and Minimum Cut

作　　者：梁海镇 陈丽丹 李峰[3] 管霖[1,4] 李中兴 卢操 LIANG Haizhen;CHEN Lidan;LI Feng;GUAN Lin;LI Zhongxing;LU Cao(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,Guangdong Province,China;School of Electrical Engineering,Guangzhou College of South China University of Technology,Guangzhou 510800,Guangdong Province,China;Power Grid Planning&Research Center of Guangdong Power Grid Co.,Ltd.,Guangzhou 510600,Guangdong Province,China;Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System(CSG Electric Power Research Institute),Guangzhou 510663,Guangdong Province,China)

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]华南理工大学广州学院电气工程学院,广东省广州市510800 [3]广东电网公司规划研究中心,广东省广州市510600 [4]广东省新能源电力系统智能运行与控制企业重点实验室(南方电网科学研究院有限责任公司),广东省广州市510663

出　　处：《电网技术》2022年第3期1084-1091,共8页Power System Technology

基　　金：广东省科技厅重点领域研发计划项目(2019B111109001)。

摘　　要：提出了一种基于最大流最小割定理的关键输电断面识别方法。算法考虑电网潮流分布及载流能力,转化为有向加权图扫描求解最小割。构建搜索树存储结果,并根据网络分割搜索输电断面,可以快速准确地辨识出全部存在"N-1"、"N-2"过载风险,且具有明确割集特征的输电断面;基于功率转移因子可快速计算输电断面静态安全功率极限。在新英格兰39节点电力系统和IEEE300节点算例中验证了提出方法的准确性。A maximum flow and minimum cut theorem based scheme is proposed for the identification of the key transmission sections in a power grid. The proposed algorithm transforms the power grid into a directed weighted graph with the consideration of the power flow and the capacity margin of the power grid during the minimum cut scanning. The searching results are stored in a search tree storage and the transmission sections are obtained through the network segmentation. All the transmission sections with "N-1" and "N-2" overload risks can be quickly and accurately identified and follows the cut set characteristics. The power limit of the transmission sections considering the static safety constraints are calculated based on the power transfer factor. Performance and feasibility of the proposed method are verified in the 39-bus New England system and the IEEE 300-bus system.

关 键 词：输电断面 最大流最小割定理 潮流转移 断面功率极限 

分 类 号：TM721[电气工程—电力系统及自动化]