中文摘要：

电力系统动态仿真是电力系统规划、设计和运行的根本依据，而仿真系统中的电网元件模型、参数的准确性决定了仿真结果与实际情况的吻合程度。但仿真不可能与实际电网完全相同，有时会相差很远。针对该现状，为提高电压稳定性分析结果的可靠性，提出在PSS/E中用接地时变导纳等值某部分电网，并基于此方法初步地研究了电力系统的静态电压稳定性。算例结果表明了这种方法的可行性、有效性。基于电力系统混合仿真进行电压稳定性分析能更准确地理解电网动态行为并更好地规划系统。

英文摘要：

Results of power system dynamic simulation are fundamental basis of planning, design and operation of power systems, and whether the simulation results can be in close coincidence with practical conditions or not depends on the accuracy of power system component models and parameters used in simulation system. However, simulation results cannot fully coincide with practical situation of actual power system, and sometimes the difference is obvious. For this reason, to improve the reliability of voltage stability analysis, it is proposed that in power system simulator for engineering（PSS/E） partial power network is replaced by grounded time-varing admittance, and using the proposed way a preliminary research on static voltage stability of power system is carried out. Results of calculation example show that the proposed method is feasible and effective, and the fact that votlage stability analysis based on hybrid simulation can explain dynamic behavior of power system more precisely is favorable to power system planning.