Based on the potential flow theory and the general dynamics principle , two kinds of formula for calculating hydrodynamic forces and moments , which are in lagrangian form and bernoulli form , and a lot of corresponding numerical results using bernoulli formula are given 根据势流理论计算流场,给出了受力计算的lagrange公式、 bernoulli公式,以及使用bernoulli公式计算的结果。物面网格离散时,着重考虑并分析了尾部平端面和首尾不对称性这些因素对受力计算精度的影响。
The first layer focuses on the modeling on the dynamic characteristics of the specific physic load at the specific time ; the second layer focuses on the modeling of the general dynamic characteristics of the specific load all the time ; while the third layer concentrates on the load modeling for large - scale power grid 负荷建模的基础研究是从系统辨识角度对同一物理负荷,在过去某一特定时刻的动态输入输出特性的拟合;负荷的时变性研究,是对同一物理负荷,在所有时间的一般动态输入输出特性的概括;大区电网负荷建模研究大区电网中不同物理地点的负荷建模策略。
After analyzing the mathematical model of wind turbine and doubly - fed induction generator , a schematic is given about the power flow in the wind turbine and generator and a static equivalent circuit is shown as well . then , through the reference frame transform , the electromagnetic equation , dynamic equivalent circuit , and vectorgraph of doubly - fed generator can be gotten in the dq reference frame . in virtue of the general dynamic equivalent circuit , it produces a asymmetry equivalent 本文在对风力机和双馈电机进行了数学分析后,给出了功率在风力机和双馈电机中的流动过程图解,同时给出了双馈电机的稳态等效电路;然后,经过坐标变换,进一步得出了同步坐标系下双馈电机的基本电磁方程、功率方程、动态等效电路和综合矢量图,并借助通用动态等效电路的形式,得出了便于定子磁链分析的不对称等效电路。