Abstract: A model of the microgrid operations with plugin electric vehicles (PEVs) in the smart grid was proposed using the combined modeling method. The models of microgrid load， PEV， generation and storage devices were setup on the basis of the multiagent modeling method， the batterychanging station model on the basis of the discrete event modeling method， and the microgrid bus power model on the basis of the system dynamics modeling method. The results demonstrated that the access of the PEVs increases the microgrid peaktime load in the daytime as well as the load in the night， which causes the increase of the peak load and peaktoaverageratio (PAR)， so the electricity storage devices should be added to improve the ability to absorb the depleted electricity from the renewable energy sources and to supply the PEV charging service. Besides， with the sufficient charging service supporting， the PEVs have fewer demands on the batterychanging service. The proposed models can well reflect the PEV and microgrid operation procedure， and shall be of great importance for the microgrid safety， reliability and efficiency.

Key words: smart grid, microgrid, PEV, recharging and batterychanging station, combined modeling