基于松弛牛顿法的互联电网并行分布式潮流计算方法

分布式潮流计算是解决多区域互联电网一体化潮流问题的有效方法。以松弛牛顿法潮流求解公式为出发点,首先利用矩阵分裂法,将互联电网分解为相互独立的子系统,然后利用矩阵求逆运算的Sherman-Morrison-Woodbery公式对各子系统进行协调求解,从而导出了一种新的互联电网并行分布式潮流计算方法。与基于网络分解及协调计算的分布式潮流计算方法相比,该方法具有更好的收敛性。利用基于PVM的分布式计算环境,以IEEE118节点系统为例,对所提算法进行了装配、测试以及分析,初步验证了所提算法的有效性。

Parallel and distributed load flow solution of interconnected power system using relaxed Newton method

The distributed computing is an efficient solution scheme for multi-area interconnected power system analysis. In this paper,a new distributed load flow algorithm is proposed based on relaxed Newton load flow formulation. In the derived algorithm,the whole system is first decomposed into a set of sub-systems through the splitting of admittance matrix,then the Sherman-Morrision-Woodbery formulation is used for the synchronous and coordination computation of the different sub-systems. The proposed method is a kind of parallel synchronous algorithm,and has a good convergence such as that of Newton-type methods. Tests on IEEE 118 bus system in a distributed computing network is done,and the result prove principally that the proposed algorithm is applicable practical to distributed load flow solution of interconnected power system.