摘要
针对病态的或初始条件恶劣的潮流情况,提出一种适合求解地区电网潮流问题的鲁棒牛拉法。该方法将具有较高计算效率的牛拉法与数值积分方法中具有较高拟合精度的四阶龙格库塔法相结合,先将潮流问题转化为微分方程组的求解问题,采用经典四阶龙格库塔公式进行迭代,当修正量小于给定阈值时再切换到牛拉法求解,改善了牛拉法的收敛稳定性。将该方法应用于桂林网区的病态潮流计算,计算结果表明,该方法步长大,收敛性好,鲁棒性强。
Aiming at ill-conditioned or badly-initialized power flow, a robust Newton-Raphson method is proposed which is suitable to solve power flow problem of regional power grid. The method combines the Newton-Raphson method which has higher calculation efficiency with the fourth-order Runge-Kutta method which has higher fitting precision. Firstly, the power flow problem is converted into solution problem of differential equations, which can be iterated by typical fourth-order Runge-Kutta formulas, and when the correction quantity is less than the given threshold value, it is solved by the Newton-Raphson method again, which improves the convergence stability of the Newton-Raphson method. The method is applied in the ill-conditioned power flow calculation of Guilin power grid. Calculation results show that the method has large iteration step, good convergence stability and strong robust.
作者
龙丹丽
LONG Danli(Guilin Power Supply Bureau, Guangxi Power Grid Co., Ltd., Guangxi Guilin 541002, China)
出处
《广西电力》
2017年第2期15-18,共4页
Guangxi Electric Power
关键词
地区电网
病态潮流
牛拉法
龙格库塔公式
regional power grid
ill-conditioned power flow
Newton-Raphson method
Runge-Kutta formula
