Method for establishing small interference model of synchronous motor to system

The invention provides a method for establishing a small interference model of a synchronous motor to a system, and relates to the technical field of power system simulation, and the method comprises the steps: constructing a small interference state equation of an MGP system; and obtaining the frequency of the MGP system under interference based on the small interference state equation of the MGP system, and comparing the frequency with a theoretical value of the MGP system under interference. Through the method provided by the invention, a synchronous motor-to-system (MGP) small interference dynamic simulation model can be established to verify the small interference resistance of MGP grid-connected new energy. 本发明提供了一种同步电机对系统小干扰模型的建立方法，涉及电力系统仿真的技术领域，包括：构建MGP系统的小干扰状态方程；基于MGP系统的小干扰状态方程获取在干扰下MGP系统的频率，并与MGP系统的干扰下的理论值进行比较。通过本发明提供的方法可以建立同步电机对系统(MGP)小干扰动态仿真模型，用以验证通过MGP并网新能源的抗小干扰能力。