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机电暂态稳定分析程序和电磁暂态程序均不能单独用于大规模交直流系统的仿真研究。开发一套基于频率相关网络等值的电磁一机电暂态解耦混合仿真系统。首先，介绍该系统的功能框架和软件模块构成。其次，给出电磁暂态侧和机电暂态侧等值电路的求取方法。然后，讨论传统诺顿等值电路与频率相关网络等值的区别，并介绍系统仿真交互时序与仿真流程。最后，采用一个纯交流系统和一个交直流混合系统的算例检验基于频率相关网络等值的混合仿真系统的仿真精度。“,”Neither electromechanical transient stability analysis （TSA） program nor electromagnetic transient （EMT） programs can be used individually for the transient stability studies of the large scale AC/DC systems. This paper presented an electromagnetic and electromechanical hybrid simulation system, based on a frequency dependent network equivalent. Firstly, the framework and the main modules of the proposed hybrid simulation system were introduced. Secondly, themethods to calculate the equivalents of the electromagnetic side and the electromechanical side were introduced. The discussion on the difference between the traditional method and frequency dependent network equivalent （FDNE） and the flowchart of the hybrid simulation were also given. In the last part of the paper, AC system and AC-DC hybrid system are both used as examples to demonstrate the accuracy of the proposed hybrid simulation system＇s simulation results.