基于电机参数的同步电机模型

A Discussion about Standard Parameter Models of Synchronous Machine

介绍了2种在原始Park方程的基础上导出的基于不同基本假设的常用的同步电机模型。由于2种假设不同,用电机参数描述的同步电机模型也存在一定差别。以一个典型的2区域系统为例对2种模型对电力系统仿真结果的影响进行了计算分析,结果表明在正常状态时2种假设条件下的计算结果基本一致;在接近临界状态时2种模型的仿真结果存在一定差别,特别是在求取暂态稳定和小扰动动态稳定极限时,极限值的差别会更大一些。因此,在比较不同电力系统仿真程序的计算结果时,要考虑其同步电机模型的影响。

Based on two different hypotheses, two different standard parameter models of synchronous machine derived from fundamental Park equations are introduced. The standard parameter models of synchronous machine are slightly distinct each other due to the different hypothesis. The impact of different standard parameter models of synchronous machine on power system simulation is analyzed by the simulations of a typical two-area power system. The simulations indicate that the simulation results are almost the same with normal condition, and are slightly different in the critical conditions of transient or small-signal stability. The difference of small-signal stability in critical condition is a little larger. Therefore, the influence of standard parameter models of synchronous machine based on different hypothesis should be considered in the comparison of simulations of different power system simulation software.