基于功率介数的电网关键环节辨识  

Power Betweenness Based Identification of Power Grid Critical Links

作　　者：王涛[1] 高成彬[1] 顾雪平[1] 梁海平[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《电网技术》2014年第7期1907-1913,共7页Power System Technology

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)~~

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。Synthesizing power transmission relation, topological structure and operational status of power grid a concept of power betweenness is proposed. According to network connectivity and the allocation of power transferring, the power betweenness of transmission line and that of node are defined respectively. Through the cascading attacks such as the breakage or overload on critical transmission lines, the effectiveness validation of the selected critical transmission lines is performed. Taking IEEE 39-bus system as the testing example, the power betweenness of transmission lines and that of nodes are calculated and sorted; according to sorted results, attacks are made on these elements to verify that these elements with high power betweenness are the weak links in power grid indeed. The stability verification under the static attack is performed by network efficiency function and power flow entropy respectively. Verification results show that the higher the power betweenness of electric element is, the greater the attack affects power grid operation.

关 键 词：潮流追踪 功率介数 关键环节 静态攻击 稳定性校验 

分 类 号：TM721[电气工程—电力系统及自动化]