基于割点和路径搜索的输电断面快速识别方法

发布时间：2018-04-03 22:48

本文选题：输电断面　切入点：割点　出处：《电力系统自动化》2014年02期

【摘要】：提出了一种基于割点和路径搜索的输电断面快速识别方法。该方法依据过载支路切除后的潮流转移特征定义了输电断面,并借助图论中的割点和块以及最短路径等概念,深入分析了输电断面的拓扑特征;通过一系列的矩阵运算,在以断开支路为中心的块中搜索出断开支路两端点间的前k条最短路径,并最终识别出受支路断开影响最严重的输电断面。文中在电网模型降维、k值的优化选取和路径搜索方面均做出了重要改进,给出了k的取值原则和利用邻近节点信息确定最短路径的方法,有效避免了关键支路漏选且可大大减少分析计算量,实现了输电断面的快速识别,为预防电网连锁故障引发的级联跳闸奠定了基础。在新英格兰39节点和IEEE 118节点系统上进行了仿真分析,结果验证了该方法的正确性和有效性。
[Abstract]:A fast identification method of transmission section based on cutting point and path search is proposed.In this method, the transmission section is defined according to the characteristics of power flow transfer after excising the overload branch, and the topological features of the transmission section are deeply analyzed by means of the concepts of cut point, block and shortest path in graph theory, and a series of matrix operations are used.The first k shortest path between the two ends of the broken branch is searched in the block centered on the disconnected branch, and the transmission section most seriously affected by the branch disconnection is identified.In this paper, important improvements have been made in the optimization and path search of the dimensionality reduction k value of the power network model. The principle of k value selection and the method of determining the shortest path by using the information of adjacent nodes are given.The leakage of key branch can be avoided and the amount of analysis and calculation can be greatly reduced. The fast identification of transmission section is realized, which lays a foundation for the prevention of cascading tripping caused by cascading faults in power network.The correctness and effectiveness of the proposed method are verified by simulation results on 39 and IEEE 118-bus systems in New England.
【作者单位】：强电磁工程与新技术国家重点实验室华中科技大学;中国电力科学研究院;
【基金】：国家自然科学基金资助项目(51377068) 国家电网公司大电网重大专项资助项目(SGCC-MPLG001(026)-2012) 国家高技术研究发展计划(863计划)资助项目(2011AA05A119)~~
【分类号】：TM73

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