摘要
通过搭建静止变频器(SFC)系统矩阵实验室(MATLAB)双闭环仿真模型,研究了SFC系统运行参数对分数次谐波的影响。分析发现,总的谐波畸变率(THD)随着回路电流的增大而减小,随着电源电压的升高而增加,分数次谐波含量也有类似的变化规律,其原因在于换相重叠角的改变;分数次谐波次数与机桥输出频率密切相关。通过类比的方法,推导分数次谐波与机桥输出频率的简化关系式,并通过仿真验证其可用性。
The effects that SFC system operating parameters have on fractional harmonic are studied by building Matrix Laboratory （MATLAB） closed-loop simulation mode! of static frequency converter （SFC）. Analysis show that total harmonic distortion （THD） decreases as loop current increases, and increases as supply voltage increases. Fractional harmonic content has the similar law of changes, of which the reason is the change of commutation overlap angle, The times of fractional harmonic are closely related to output frequency of machine bridge. The simplified relation between fractional harmonic and machine bridge output frequency is derived by the method of analogy, and its availability is verified by simulations.
出处
《江苏电机工程》
2012年第5期36-39,共4页
Jiangsu Electrical Engineering
关键词
分数次谐波
静止变频器
MATLAB仿真
运行参数
fractional harmonic
static frequency converter
MATLAB simulation
operating parameters
