【摘要】 提出一种基于线路功率组成快速识别与过载支路相关的关键输电断面的方法,为避免发生连锁过载的快速控制算法提供基础。首先根据当前潮流采用基于图论的输电线路功率组成的快速分析方法,计算出每条线路上各发电机与各负荷间实际输送的功率;然后采用基于离差平方和法的聚类分析对线路进行分类,得到各条线路按照与过载线路功率组成相似程度的排序。线路过载后,依序比较回路中线路与过载线路的潮流方向,以判定其是否属于过载线路的并行输电断面。最后通过计算过载线路切除后引起其潮流增加的有功潮流分布系数,判定过载线路的并行输电断面的范围。采用标准IEEE14节点系统进行仿真计算,结果验证了该算法的有效性和可行性。更多还原

【Abstract】 This paper proposes an algorithm for fast searching for key transmission section based on power component of line. Firstly, graph theory is used to calculate the real power transfer among individual generators and loads, then classify the lines based on the Ward’s cluster analysis method to search the order of lines according to the comparability of lines and overload line, then determine in series whether a line belongs to the parallel transmission section of overload line according to the direction of the overload line and the line in a circuit. Finally, calculate in series power flow of a line after overload line tripping to confirm the parallel transmission section of overload line. As a result, the works of further calculation and security analysis can be reduced greatly. And fast security protection of key sections to prevent cascading tripping can be achieved accordingly. At last, the validity of proposed algorithm is verified by the calculation result of IEEE 14-bus test system.更多还原