基于功率介数的电网关键环节辨识

发布时间：2018-01-07 02:02

本文关键词：基于功率介数的电网关键环节辨识　出处：《电网技术》2014年07期 　论文类型：期刊论文

【摘要】：综合功率输送关系、电网拓扑结构和系统运行状态,提出了功率介数的概念。根据网络连通性及功率输送分配关系,分别定义了线路功率介数和节点功率介数。通过关键线路断线或过负荷的连锁攻击进行有效性校验。以IEEE 39节点系统作为测试算例,计算线路的功率介数和节点功率介数并进行排序,按照排序结果对这些元件进行攻击,验证了这些高功率介数元件确为网络中的脆弱环节。分别以网络效能函数和潮流熵进行静态攻击稳定性校验,校验结果表明电气元件的功率介数越高对电网运行的影响就越大。
[Abstract]:In this paper, the concept of power medium is put forward according to the connection of network and the distribution relation of power transmission by synthesizing the power transmission relation, the topology structure and the operation state of the power system. The line power and node power are defined respectively. The validity is verified by critical line break or chain attack of overload. The IEEE 39 bus system is taken as a test example. The power mediums and node power mediums of the lines are calculated and sorted, and these elements are attacked according to the sorting results. It is verified that these high power intermediate elements are the weak link in the network. The static attack stability is checked by the network efficiency function and the power flow entropy respectively. The results show that the higher the power medium of electrical components, the greater the influence on power grid operation.
【作者单位】：华北电力大学电气与电子工程学院;
【基金】：国家自然科学基金资助项目(51077052) 中央高校基本科研业务费专项资金项目(13MS108)~~
【分类号】：TM711
【正文快照】： 0引言近年来,世界范围内的大停电事故频繁发生[1-3]。大停电事故往往是由个别电网元件故障或者部分节点过负荷导致的。而大停电事故的扩大又与电网的关键环节具有紧密的联系。这些关键环节主要包括:在系统稳定中扮演重要角色的脆弱性线路和节点,它们的退出将导致网络元件故障

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