短时间步长动态潮流算法的研究

为了解决以往动态潮流中存在的当系统出现大的功率缺额时，潮流无法解算的问题，采用先解系统频率变化，然后计算潮流分布的方法。提出了一种短时间步长(10s)的动态潮流方法，这种方法的特点是在表征系统功率-频率变化的运动方程中，既考虑转子加速的影响，又考虑发电机和负荷静特性的影响，并根据转子转动惯量与节点的静特性系数分担不平衡功率．计算结果表明，本文方法的有效性和收敛性。

Investigation on dynamic load flow of short time step

A dynamic load flow method of short time step (10s) is presented, in which rotor acceleration and the static characteristic of generator and load are considered in the rotor motion equation. The unbalance power is distributed according to the coefficient of static characteristic and inertia constant. The traditional dynamic load flow isn't easy to converge when a large unbalance power exists. To overcome the shortcoming, frequency is calculated before power flow is done in the proposed method. The calculation results show that the proposed algorithm is valid and convergent.