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.
针对环形控制网的网形特点，推导了各类观测量：测边、测方向和测高的极坐标误差方程式。
In this paper, the polar coordinate error equations on side, direction and height in the circular control worknet are derived making good use of the circular character of circular worknet.
通过对电液阀结构与工作原理的分析，导出了电液阀的p—I（压力—控制电流）特性方程式。
The structure and the working principle of electronic-hydraulic valve are analysed and the P-I (Pressure-Control current)characteristic equation of electronic-hydraulic valve is derived.
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