The invention provides a voltage source simulation system for a wind turbine generator set, and the system comprises a wind turbine module, a variable pitch module, an axial system module, a control module, a protection module, and a voltage source module. The wind turbine module is connected with the axial system module. The variable pitch module is connected to the wind turbine module, and is connected with the control module. The axial system module is connected with the control module, and is connected to the protection module. The control module is connected to the protection module and the voltage source module. The system provided by the invention is flexible and open, is good in maintainability, and is good in extendibility. The system meets the demands of the simulation environment of multiple sets and complex power grid structures at the spatial scale, meets the simulation stepping demands a large range from a millisecond level to a second level at the time scale, meets the simulation implementation demands of all mainstream wind turbine generator sets and the typical control and grid-related protection characteristics of the wind turbine generator sets, is not limited by a simulation software platform, and accurately and efficiently achieves the parameter compatibility of a software-crossing platform.