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提出了一种基于潮流追踪和凝聚算法的电力系统无功控制分区方法。该方法通过无功潮流追踪,确定无功源节点对各个节点无功输入的贡献比例,以此量化系统节点之间的无功耦合程度。在此基础上,定义了节点之间的距离,进而采用凝聚算法对系统所有节点进行聚合,并确定最优分区数目。IEEE 39节点和IEEE 118节点系统的分析计算验证了所述方法的有效性。所得无功控制分区能使分区内部的无功功率基本平衡,且能随系统运行条件的变化而变化。所提分区方法计算便捷,在实际系统中具有一定的应用价值。
A reactive power control method based on power flow tracing and agglomeration algorithm is proposed. In this method, reactive power flow tracking is used to determine the contribution ratio of reactive power nodes to reactive power input of each node, so as to quantify the degree of reactive power coupling between system nodes. On this basis, the distance between nodes is defined, and then the aggregation algorithm is used to aggregate all the nodes in the system and determine the optimal number of partitions. The analysis and calculation of IEEE 39 nodes and IEEE 118 node systems verify the effectiveness of the proposed method. The resulting reactive control zoning can make the reactive power within the zoning basically balanced, and can change with the system operating conditions. The proposed partition method is computationally convenient and has certain application value in practical systems.