中文摘要：

针对传统电动机聚合方法没有考虑电动机转子电磁暂态特性的不足,该文提出了一种计及系统稳定性和电磁特性的电动机聚合方法。首先,分析影响电力系统稳定性的主要电动机参数,并以这些参数组成特征向量,将电动机群分为系统稳定性好和稳定性差的两组;其次,根据各电动机的实际运行工况,综合考虑电动机转子电磁、机械特性,求解聚合电动机的运行滑差,进而求解聚合电动机的电气参数;最后搭建IEEE9节点系统对该方法进行仿真验证。结果表明,相对于传统容量加权法以及同调动态聚合方法,将原电动机群聚合成单台电动机时,文中方法聚合精度最高,且计算量比同调动态聚合法小;同时,通过聚类采用两台等值电动机模拟原电动群,比单台等值电动机的误差更小,其动态响应曲线几乎与原电动机群吻合。

英文摘要：

As the traditional aggregation approach of induction motors does not consider the rotor＇s electromagnetic characteristics,an improved method considering system stability and transient model is presented. First,by abstracting the parameters which have a crucial influence on system stability as the characteristic vectors,motors are classified into two subgroups,one subgroup with good system stability,and the other with bad system stability. Secondly,according to the operation condition of individual motor,the slip of equivalent motor is obtained based on the rotor＇s electromagnetic and mechanical characteristics. Then electrical parameters of equivalent motor are calculated based on the slip. Finally,this method is verified by IEEE 9-bus system. Simulation results show that the proposed method has a higher precision to simulate the original individual motors than the classical weighted method and the coherent dynamic method,and fewer calculations than the coherent dynamic method. In addition,two equivalent motors is much more accurate than one equivalent motor,the dynamic curves of two equivalent motors almost match the original motors.