同步发电机整流负载系统平均模型的研究

对同步发电机带整流负载系统进行分析,给出了发电机d、q轴电压电流与整流桥输出直流侧电压电流间的关系式,利用MATLAB/Simulink建立了发电机整流桥系统平均模型,并与精确仿真模型的运行结果进行了对比。得出结论:平均模型忽略了叠加在系统直流变量平均值上的波动和交流变量上除基波外的其它各高次谐波。它可以较为准确地反映出发电机整流桥系统电压、电流的稳态和动态变化,不仅节省了仿真时间,还可以进一步用来设计系统控制律。

Study on the Average Model of Synchronous Generator with Rectifying Load

The synchronous generator with rectifying load was analyzed.A set of equations described the relationship between the voltages or the current on axes d,q and the DC voltage or current on the output of rectifier were obtained.An average model of synchronous generator-rectifier system was built using MATLAB/Simulink.The results of the average model were compared to that of a detailed simulation model.The conclusion can be drawn:the average model ignored the ripples present in DC variables and the higher harmonics other than fundamental in AC variables.It gave accurate results in both the steady and the transient state.The average model not only can save much simulation time,but also can be used to design the system's control law.