关于网络故障脆弱性优化评估仿真

Vulnerability Optimization Assessment Simulation of Power Grids Based on failure mode

摘要:

网络故障脆弱性优化评估即分析故障模式下的电网脆弱性变化,以降低故障影响及发生可能性,但传统的脆弱性评估中忽略了线路权重以及输电效率的影响,构造以线路电抗为权值的电网加权拓扑模型,定义综合考虑节点和边差异性的网络结构熵下降百分比指标和考虑路径长度的输电效率下降百分比指标,通过不同故障模式下的指标变化值,分析电网的脆弱性,最后对IEEE9节点系统进行仿真分析,实验结果验证了所提方法的有效性和正确性,且说明电网对关键节点的依赖大于普通节点,合理安排电网结构将有效提高系统稳定性能。

Abstract:

Vulnerability optimization assessment simulation of power grids based on failure mode is to analyze its vulnerability, and reduceStheSimpactSofSnetworkSfault, the impedance based topological model and cascading failure model for weighted power grid were established. Considering both node andedge differences to evolution and define a new network structure entropy, and considering the pathlength to define transmission efficiency index. Then analyze vulnerability of power network via index values changes under different failure mode. Simulation results on the IEEE9 bus system showStheSeffectivenessSandSaccuracySof the suggestedShybridSmethod,and indicated power grid relies muchmore on key nodes than common nodes, and arranging a reasonable structure will be more effective in increasing the reliability and stability of the power grid.#$NLKeywords：power network; vulnerability; cascading failure; network structure entropy; Transmission efficiency