Abstract: The electromechanical models at device level of doubly-fed wind generator,photovoltaic（PV） and energy storage unit were constructed by composition modeling method.Then,their substation level models were constructed by equivalent method.So the integrated generation’s electromechanical transient model of wind-farm,PV station and energy storage station was achieved and programmed in PSD-BPA program.The simulation result for a small sample system and Zhangbei wind,solar and energy storage demonstration station verified the model’s validation.The composition model and equivalence will provide an effective analysis tool for grid-connection of integrated generation.