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中文摘要：
无功优化分解协调算法中,根据电压-无功灵敏度对电力系统进行分区,使得各区域节点间电压无功耦合最弱,这样有利于提高该算法的计算效率和实用价值。求出正常运行状态下的节点间电压-无功灵敏度,应用阀值搜索分区算法对系统节点进行分区,用节点分裂法将系统分解为几个较小规模的子网络。IEEE118节点系统和两个实际系统（538节点和1133节点）的无功优化计算表明,该分区算法能改善算法的收敛性,从而提高其计算效率。
英文摘要：
Based on sensitivities between voltage and reactive power ,a power system is partitioned so that the coupling between voltage and reactive power among buses of sub-areas is weakest in decomposition and coordination algorithm of reactive power optimization. Hence,i ts computational efficiency and practical value can be enhanced.This paper calculates sensitivities between voltage and reactive power at normal state firstly,then partitions buses using threshold search algorithm,and finally decomposes a power system into several small subsystems by node tearing. Results on IEEE 118-bus system and two practical systems such as 538-bus and 1133-bus systems validate that this novel partition algorithm can improve the convergence of decomposition and coordination algorithm and promote its efficiency.
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