基于相关矩阵的电网广域后备保护算法

Wide Area Backup Protection Algorithm for Power Grid Based on Correlation Matrix

在采用本线路方向信息和距离信息的基础上,融合相邻线路方向信息,提出一种基于线路保护相关矩阵的广域后备保护算法,以实现简单可靠和容错性高的保护。该算法根据线路关联系数推导线路保护相关矩阵,通过计算该矩阵中各行元素之和并与门槛值比较即可实现故障元件判断。以IEEE 5机14节点系统为例,分别通过枚举法和蒙特卡洛随机抽样试验对算法的容错性进行研究,结果表明,所提出的广域后备保护算法具有较高的容错性,简单可靠。

A wide area backup protection algorithm based on correlation matrix of line protection is proposed in order to realize protection with simple, reliable and high fault-tolerance performance. Direction information and distance information of local line as well as direction information of adjacent lines are taken into account. The correlation matrix of transmission lines protection is derived with the line association factor to implement the algorithm. It can identify the faulty component by calculating sum of each row elements values in the correlation matrix and comparing with threshold value. Both enumeration method and Monte-Carlo method are respectively used to study the fault-tolerance performance of the proposed algorithm for IEEE 5 generator 14-bus system as an example. The results show that the proposed algorithm is simple and reliable, and has good fault-tolerance performance.