【摘要】 为改进传统单机等效法在电力系统稳定分析中的精度，提出了用泰勒级数表示单机等效模型的方法．通过在３９节点１０发电机计算电网上的计算结果比较，说明该方法同时兼顾了在线算法的快速性和精确性双重要求，因而具有在线应用于电力系统安全运行管理系统中的潜在优势．更多还原

【Abstract】 Among various methods for transient stability analysis Single Machine Equivalent System (SMES) methods might be the fastest,but its inaccurate analysis result for some fault conditions confines its real application.To enhance the reliability of SMES methods,Taylor Series equations for parameters of the dynamic SMES model are developed.These equations allow some model parameters to be time varying but a SMES is still set up at fault clearing.Considering these equations,an approach for energy margin of multi machine power systems is developed.Some test results on the 10 machine New England test power system are reported to show the improvement achieved over the traditional SMES models.更多还原