基于拓扑分群等值的不同拓扑下方向过流保护整定计算方法  

Coordination Method of Directional Overcurrent Relays Under Different Topologies Based on Topology Grouping and Equivalence

作　　者：陈朝晖[1] 漆家炜 郑茂然[1] 张弛[1] 张静伟 吴江雄 李银红[2] CHEN Zhaohui;QI Jiawei;ZHENG Maoran;ZHANG Chi;ZHANG Jingwei;WU Jiangxiong;LI Yinhong(Power Dispatching Control Center of China Southern Power Grid,Guangzhou 510663,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]中国南方电网电力调度控制中心,广州510663 [2]强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院),武汉430074

出　　处：《南方电网技术》2021年第4期81-89,共9页Southern Power System Technology

摘　　要：计及电网不同拓扑的方向过流保护整定计算是过流保护面向电网工程应用的一项重要基础性工作。为解决考虑不同电网拓扑后优化整定计算模型求解困难和所得定值性能不佳问题,提出了一种基于拓扑分群等值的不同拓扑下方向过流保护优化整定计算新方法。基于所建立的适用于整定计算的电网拓扑描述模型,采用凝聚层次聚类算法对不同网络拓扑进行了聚类分群,并利用拓扑轨迹相似度计算得到了拓扑集群的等值特征拓扑,最后构建了基于等值特征拓扑的方向过流保护优化整定模型以确定保护定值。IEEE 30节点系统算例分析结果表明,所提方法有效降低了约束维度,同时能够确保所得定值面向不同网络拓扑的性能。The coordination of directional overcurrent relays considering different topologies is an essential fundamental work for overcurrent relays applied to the power grid projects.In order to solve the problem of difficulty in solving the model of optimal coordination of relays and the poor performance of the obtained relay settings after taking into account different network topologies,a novel method for optimal coordination of directional overcurrent relays under different topologies based on topology grouping and equivalence is proposed.Based on the established network topology description model suitable for relay coordination,the different network topologies are clustered by using the aggregation hierarchical clustering algorithm.The equivalent representative topology of each topology cluster is obtained by calculating the topological trajectory similarity.The model of optimal coordination of directional overcurrent relays based on equivalent representative topology is finally established to determine the relay settings.The results of the case study of the IEEE 30-node power system show that the proposed method effectively can reduce the constraint dimension and guarantee the performance of the obtained relay settings towards different network topologies.

关 键 词：网络拓扑 拓扑分群等值 方向过流保护 优化整定 

分 类 号：TM77[电气工程—电力系统及自动化]