基于脆弱线路辨识的电网连锁故障严重路径快速搜索

为在保证搜索精度的同时进一步提升搜索效率,基于电网动态特性,在脆弱线路辨识的基础上,提出一种连锁故障严重故障路径快速搜索方法。该方法首先采用改进K核法,从而实现脆弱线路辨识;其次,将连锁故障前两级指定为脆弱线路,使连锁故障模拟过程向负荷损失较大的方向发展,从而提升严重故障路径搜索效率。以IEEE-39节点系统为算例进行仿真,结果验证了所提方法的高效性。

Rapid Search of Cascading Failure Serious Paths in Power Systems Based on Vulnerable Line Identification Results

In order to balance the search accuracy and efficiency, this paper proposed a new algorithm, which is based on vulnerable line identification results and operation status of power systems and is suitable for the rapid identification of serious fault paths. Firstly, the modified k-core method was introduced to rapidly recognize the vulnerable lines in power grid. Secondly, the cascading failure development in the direction that may lead to serious power losses was identified by specifying the first two cascading failure components as the vulnerable lines, so as to improve the efficiency of prediction. The case studies are carried out on the IEEE 39-bus test system to demonstrate the validity and effectiveness of the proposed method.