中文摘要：

大电网互联导致电力系统低频振荡现象频繁发生,提出在PSS/E中进行混合仿真,将外部系统用接地时变导纳动态等值,基于此研究电力系统低频振荡。以6机23节点系统为算例,首先对全网动态仿真以获取实测数据,然后实施混合仿真,并对电网联络线潮流进行Prony分析,结果表明了这种方法的可行性、正确性。

英文摘要：

To deal with the frequent phenomenon of low frequency oscillation caused by interconnection of large power grids,a research method for low frequency oscillation based on power system hybrid simulation in PSS/E by replacing parts of the power grid with grounding time-varying admittance was proposed.By using the 6-machine 23-bus system,the real data was firstly obtained through dynamic simulation of the whole network,and then the hybrid simulation was carried out,followed by the Prony analysis of tie-line power flow. The results proved the method feasible and effective.