基于广域方向信息的故障区域判定方法分析

Fault Area Determination Method Based on Wide Area Direction Information

为了提高日益复杂的电力系统网络结构下保护的适应性,提出一种基于广域方向信息的故障区域判定方法,利用广域信息对选定元件建立了不受网络结构影响的关联域指标。该方法基于电网络理论,推导了支路、节点、开关之间的关联信息矩阵;通过广域信息系统获取全网开关的功率方向信息,基于关联矩阵计算功率支路方向和信息及节点功率方向和信息,对于设定的关联区域计算其关联域指标,利用该指标进行故障区域判定,并对IEEE14节点算例进行仿真验证,仿真结果表明该方法不但能够在信息完整情况下有效地判定出故障区域,而且能够在信息缺失或信息有误时正确地选出故障区域。

In order to improve the adaptability of protection under the increasingly complex network structure of modern power system,a fault area determination method based on wide area direction information is proposed,and an association area index independent of network structure is established for selected components by using wide area information.Based on the theory of electrical network,the correlation information matrix among branches,nodes and switches is derived.Through wide-area information system for the entire network switch power direction information,direction and information based on incidence matrix computing power branch and node power direction and information,to set up the correlation domain indexes of correlative area,using fault area to determine the index,and carries on IEEE14 node example simulation,the simulation results show that the method can not only identify the fault zone under the condition of complete information effectively,but can select the fault zone when information is missing or wrong information right.