基于多链路连锁故障图的电网脆弱线路分析

Analysis of Fragile Lines in Power Grid Based on Multi-link Cascading Failure Diagram

为实现迅速正确地进行脆弱线路辨识,提出一种基于新型指标建立多链路事故链模型,并生成连锁故障图的分析方案。基于复杂网络理论对模型进行计算和分析,以系统负荷损失率为依据对线路脆弱性进行衡量,最后以IEEE39节点系统为算例验证了该方法的有效性。该方法突破了传统方法事故链模型建立过程中单对单线路的限制,并有效地实现了脆弱线路的辨识。

Rapid and correct identification of vulnerable lines is of great significance to maintaining the safety of the power grid and avoiding large-scale power outages.Based on this,this paper proposes an analysis scheme to establish a multi-link accident chain model based on new indicators and generate a chain fault diagram.The model is calculated and analyzed based on the complex network theory,and the line vulnerability is measured based on the system load loss rate.Finally,the IEEE39-bus system is taken as an example to verify the effectiveness of the method.The method breaks through the limitation of a single pair of single lines in the process of establishing an accident chain model by the traditional method and effectively realizes the identification of fragile lines,so as to maintain the safety of the power grid and improve the stability of the power grid.