数模-动模混合仿真系统的接口建模与稳定性分析OA北大核心CSTPCD

To meet the development needs of modem power system real-time simulation,digital analog dynamic analog hy-brid simulation combines the advantages of real-time digital simulation and physical dynamic simulation,and becomes an important simulation method for modem power system re-search.The interface system is the core and difficult part of the hybrid simulation system design.In order to deeply analyze the stability of the hybrid simulation system,the open-loop trans-fer function of the system was obtained by modeling each com-ponent of the interface system.The effects of different paramet-ers in the open-loop transfer function on the stability of the sys-tem were studied according to the Rouse criterion and the Nyquist criterion,respectively.Theoretical derivation shows that the filter cutoff frequency,interface delay and impedance simulation ratio in the interface system have a large impact on the stability of the system.The experiments were conducted by the built hybrid simulation system,and the experimental results show that the influence of different parameters on the stability of the system is consistent with the theoretical derivation.