Abstract: Wind and photovoltaic power generation are the clean energy developed vigorously in China. Bundling wind, PV and thermal power through long-distance channels can effectively solve the problem of energy distribution against topography in China. The effective combination of the virtual synchronous generator（VSG） strategy with photovoltaic units and wind power in the bundling system is an effective way to solve the problem of the lack of inertia at the sending end caused by the high proportion of new energy sources connected to the grid. Based on the PSCAD simulation software, the basic simulation model of bundled wind-PV-thermal delivery system was firstly established. Then through the simulation, we analyzed the effect of the different types of AC faults, the proportion of wind-PV-thermal at the sending end and the control mode of the DC rectifier side on the transient stability of the bundled delivery system. And the simulation result was basically consistent with the theory. Afterwards, the VSG control strategy was introduced to the DFIG and photovoltaic grid-connected converter. And the effectiveness of the VSG strategy in improving the inertia of the sending end of the wind-thermal bundled system was verified through simulation.