本论文结合灵敏度方程式及九区图法理论，运用于变电所电压及虚功率控制；

The thesis focused on testifying the impact of the sensitivity equation and the Nine-Area Theory on voltage control and reactive power dispatch.

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提出一个建立在基尔霍夫定则及其对偶定则基础之上的线性电路解法，只需对网络图的结构进行分析，不需列写任何电路方程式。

A solution of linear circuit based on Kirchhoff"s rule and its dual rule is presented. By means of this solution, analysis are required to the structure of graph, no any circuit equations are needed."

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