配电子系统的建模关键是忽略其内部的暂态过程并作出了网络的等值电路图，因而依此建立的节点电压方程为代数方程。
The key to power distribution system is to ignore transient process in this sub-system and to draw the network equivalent circuit diagram, therefore its node voltage equation is algebraic equation.
针对多机系统的经典数学模型，给出多机系统在角度中心下的状态空间方程及其暂态能量函数。
Secondly, Aiming at classical mathematics model of Multi-machine System, state equation and transient energy function are putted forward in the center of angle.
应用拉格朗日方程对非线性RLC串联电路的暂态过程进行了求解，对所得到的解析解进行了分析，得到了非线性RLC电路的一些普遍特征。
By using Lagrange formulations, the solution of transient in nonlinear serial RLC circuits was obtained and analyzed to find their some general features.
数值积分法通过求解电力系统的动态方程组分析暂态稳定性，因此需要建立电力系统的动态数学模型。
Transient stability analysis based on numerical integration method is applied by solving the dynamic equations, so models of power system are required.
数值积分法通过求解电力系统的动态方程组分析暂态稳定性，因此需要建立电力系统的动态数学模型。
Transient stability analysis based on numerical integration method is applied by solving the dynamic equations, so models of power system are required.
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