基于电气介数的电力系统脆弱线路辨识

Identification of Electrical Power System Vulnerable Line Based on Electrical Betweenness

为了防止大规模停电事故的发生,电力系统需要对电网中的脆弱线路进行辨识并对其进行保护。文中用到的电气介数是基于直流潮流计算的,综合考虑了电气距离和容量分布,分析了其对网效性能的影响。由此得出结论,电气介数越高,电网中的线路越脆弱,当这些线路受到攻击时,电网效能下降的越快,由此得出了电气介数与电网中线路脆弱性的关系。

In order to prevent large-scale power system blackout,the power system needs to have the ability of vulnerable line identification and protection.Electrical betweenness used in this paper is based on DC load flow calculation,considering the distance and the capacity of the electrical distribution.Its effect on the performance of the network is analyzed.It follows that the higher the electrical betweenness,the more vulnerable the grid lines.When these lines under attack,network performance decline faster.Thus the relationship between electric betweenness and the grid lines vulnerability is obtained.