桂林电网220kV主干网关键线路脆弱度辨识

Key Line Vulnerability Identification of 220 kV Main Network in Guilin Power Grid

结合实际情况研究桂林电网220 kV主干网络关键线路的脆弱度。通过线路介数、平均传输距离、最大输电能力3个指标综合评估线路重要度,再引入区间故障概率模型,最后得到线路脆弱度指标。对桂林电网220 kV主网关键线路进行脆弱度计算与分析,计算结果表明:桂林网区220 kV末端网络结构薄弱,自然灾害、电源点不足、线路重载等情况对整体脆弱度影响较大。线路脆弱度辨识可以有效指导网架基础建设、技改大修及特殊情况下的巡维工作。

Key line vulnerability identification of 220 kV main network in Guilin power grid is studied combining with the actual situation. Three indexes including the line betweenness, the average transmission distance and the max transmission capacity are used to assess comprehensively the importance degree of lines. Then the interval fault probability model is introduced. At last the line vulnerability index is obtained. The key line vulnerability index of 220 kV main network in Guilin power grid was calculated and analyzed. Calculation results show that the structure of 220 kV terminal network in Guilin power grid is weak. Situations such as natural disasters, shortage of power source point, and lines with heavy load and so on have bigger influence on the whole vulnerability. The line vulnerability identification can effectively guide the fundamental construction of power grid structure, and the patrol and maintenance work during technological transformation and overhaul and special circumstances.