宁夏地区电网脆弱性综合分析与评估

发布时间：2018-01-19 06:21

本文关键词： 宁夏电网复杂网络脆弱性　出处：《宁夏大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着全球经济的不断发展,大规模跨区域电网互联使得电力系统变得越来越复杂,这提高电力系统运行效率的同时也增加了其复杂性。近年来,很多地区和国家发生的大规模停电表明,局部的小故障会迅速传播,造成一系列停电事故,甚至会导致电力系统的瘫痪。应用复杂网络理论的全局分析法研究电力系统产生连锁故障的原因,揭示故障传播的内在机理将变得十分有必要。本文应用复杂网络理论建立宁夏地区电网的网络模型,应用Pajek软件计算网络特征参数：节点度数、度分布、最短路径长度、聚类系数、节点及边的介数等；利用度分布、最短路径长度和聚类系数判定宁夏电网所属的网络类型；构建电网故障策略,随机移除点／边、有目地移除点／边的方法,对比电网遭受不同攻击后特征参数与两个故障指标的变化,分析宁夏电网遭受不同攻击方式下的脆弱性；对IEEE118节点标准测试系统进行相同的故障模拟,将结果与宁夏电网相比较,分析两种电网的差异。针对无向、无权复杂电网模型的不足,以电网线路的电抗值作为权重,建立更加符合电网特性的加权网络模型,计算加权后电网的最短路径长度和各节点与边的介数,并作为动态脆弱性判定依据,确定宁夏电网中的重要节点及线路。
[Abstract]:With the continuous development of the global economy, large-scale cross-regional power grid interconnection makes the power system become more and more complex, which improves the efficiency of power system operation, but also increases its complexity in recent years. Large-scale power outages in many regions and countries show that small local failures can spread rapidly, resulting in a series of blackouts. The global analysis method of complex network theory is used to study the causes of cascading faults in power system. It is necessary to reveal the inherent mechanism of fault propagation. In this paper, the complex network theory is applied to establish the network model of Ningxia power network, and the network characteristic parameter: node degree is calculated by using Pajek software. Degree distribution, shortest path length, clustering coefficient, number of nodes and edges, etc. Using degree distribution, shortest path length and clustering coefficient to determine the network type of Ningxia power network; The power network fault strategy is constructed, the point / edge is removed randomly, and the point / edge is removed. The change of characteristic parameters and two fault indexes after different attacks are compared. The vulnerability of Ningxia power grid under different attack modes is analyzed. The IEEE118 node standard test system is simulated with the same fault, the results are compared with Ningxia power grid, and the differences between the two kinds of power grid are analyzed. Taking the reactance value of power line as the weight, the weighted network model is established, and the shortest path length and the number of nodes and edges of the weighted network are calculated, which can be used as the basis for determining the dynamic vulnerability. Determine the important nodes and lines in Ningxia power grid.
【学位授予单位】：宁夏大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM732

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