对大型电力系统采用动态等值可以大大降低计算量，并能突出主要特征。
Dynamic equivalents are used to reduce the computing effort and manifest the principal characteristics of power systems.
通常电力系统外网等值分为静态等值和动态等值两类。
Generally, the external system equivalence consists of static and dynamic equivalence.
因而采用基于相关发电机识别的动态等值法对电力系统进行化简以克服上述问题。
So it is proposed in the paper a dynamic equivalence method based on coherent generators identification for system reducing.
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