线路开断引起电力系统分裂后的潮流计算

在静态安全分析中，因线路开断引起系统分裂后，常规解算方法是对各孤立系统（“岛”）重新形成相应的网络矩阵和因子表，并在此基础上计算ＡＣ潮流，对于互联系统来说，这种传统处理方法会耗用大量机时。本充分利用现已成熟的稀疏技术来对各“岛”进行潮流计算，本算法不但在精度上与常规算法完全一致，而且机时节约显，从而有利于在线应用。

THE LOAD FLOW SOLUTION METHOD FOR NETWORK ISLANDING CAUSED BY LINE OUTAGE

In static security analysis, the separation of a power system into islands caused by line contingency maytake place. As a conventional approach to a load flow solution for islands, the relevant network matrices of the isolated subsystems have to be reconstructed and refactorized respectively. For large-scale interconnected systems, this traditional process requires substantial computational time. In order to deal with the islanding problem efficiently, a novel algorithm employing fully developed sparse techniques is presented. Using this method, some numerical tests have been performed on the modified IEEE 30 bus test system and the 290 bus system in East China. The calculated results indicate that the algorithm not only achieves the same accuracy but also saves CPU time considerably as compared with the conventional one. In consequence, the method presented is most suitable for on-line applications.