【摘要】 鉴于自适应化简等值算法的有效性，本文提出了一个电力系统预想事故快速分析的新算法。该算法首先构成了包括断开支路在内的局部等值小网，然后利用快速前代和快速回代技术对等值小网进行ＡＣ潮流求解。通过对ＩＥＥＥ一５７节点试验系统和华东１５８节点系统的验算，证明该算法不但有令人满意的精度，而且有较理想的机时节约。更多还原

【Abstract】 On account of the effectiveness of the adaptive reduction method for obtaining a power flow equivalent, in this paper a fastand novel algorithm for the contingency evaluation of power systems is proposed At first ,a local equivalent network includingthe outage line is formed from the concept of concentric relaxation. And then, a security assessment for the equivalent networkis performed through an AC load flow, in which the fast forward and the fast backward substitution techniques are used.Using the algorithm presented to the IEEE-57 bus test system and the 158 bus system in East China, the calculated resultsindicate that the algorithm not only gives a satisfactory accuracy but it also achieves an ideal computational time saving as com-pared with conventional contingency analysis methods.更多还原