基于节点电压方程拆解的交替迭代潮流算法

An Alternating Iterative Power Flow Algorithm Based on Bus Voltage Equation Decomposition

为提升潮流计算的收敛性与鲁棒性,提出一种双子网交替迭代潮流算法。该算法对网络节点电压方程进行拆解,得到PQ子网与PV子网的网络方程。根据节点特征,分别采取高斯法与牛顿法求解PQ子网与PV子网。利用子网间的耦合关系交替迭代求解子网潮流,进而完成对原网潮流的计算。与高斯–赛德尔法进行对比,论证了所提算法收敛性能的优越。在不同规模的标准算例系统中测试算法并与多种潮流算法相对比,仿真结果表明,所提算法收敛性更好,对迭代初值的选取具备更强的适应性。

In order to improve the convergence and robustness of power flow calculation,a double grid alternating iterative power flow algorithm is proposed.The algorithm disassembles the network bus voltage equation to obtain the network equations of PQ subnet and PV subnet.According to the bus characteristics,Gauss method and Newton method are used to solve PQ subnet and PV subnet respectively.The power flow of the sub network is solved alternately by using the coupling relationship between the sub networks,and then the power flow of the original network is calculated.Compared with Gauss-Sidel power flow method,the convergence performance of the proposed algorithm is proved to be superior.The algorithm is tested in standard example systems of different scales and compared with other power flow algorithms.The simulation results show that the proposed algorithm has better convergence and stronger adaptability to the selection of iterative initial values.