基于改进GN分裂算法的电磁环网分区及方案评估方法

发布时间：2019-03-08 08:21

【摘要】：随着电网规模的不断扩大,电网联系越来越密集,短路电流水平日益增高。220k V电网分区运行已成为限制500/220k V电磁环网短路电流的重要措施之一。为此,提出一种改进GN(Girven Newman)分裂算法的分区方法,该方法在以节点收缩后的节点重要度择取特征节点集成员的基础上,进一步采用GN分裂算法获取评价线路薄弱程度的边介数,而得到分区方案;同时为合理评估方案的优劣,在构建二级指标信息熵评价模型和一级综合指标主成分分析评价模型的基础上,提出一种综合考虑短路电流、静态安全约束及其社团结构模块度3类指标,基于信息熵主成分分析的环网分区方案评估方法。最后以新英格兰10机39节点系统和某实际电网作为算例,验证了所提分区方法的正确性和方案评估方法的有效性。
[Abstract]:With the expansion of power grid scale, the connection of power network becomes more and more dense, and the level of short circuit current is increasing day by day. The zoning operation of 220kV power network has become one of the important measures to limit the short circuit current of 500 kV electromagnetic ring network. For this reason, an improved GN (Girven Newman) splitting algorithm is proposed, which selects feature node set members based on node importance after node contraction. Furthermore, the GN splitting algorithm is used to obtain the edge meshwork to evaluate the weak degree of the line, and the partition scheme is obtained. At the same time, in order to reasonably evaluate the advantages and disadvantages of the scheme, on the basis of constructing the two-level index information entropy evaluation model and the first-order comprehensive index principal component analysis evaluation model, a comprehensive consideration of short-circuit current is proposed. Static safety constraints and their community structure modularity three kinds of indicators, based on information entropy principal component analysis of ring network zoning evaluation method. Finally, a new England 10-machine 39-node system and a practical power grid are taken as examples to verify the correctness of the proposed zoning method and the effectiveness of the scheme evaluation method.
【作者单位】：四川大学电气信息学院;国网四川省电力公司电力科学研究院;
【基金】：国网四川省电力科学研究院科技项目(SGSCDK OOXTJS1500196)~~
【分类号】：TM732

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