【摘要】 传统的PWM整流器用L滤波器来滤除谐波,而LCL滤波器可以用较小的电容电感值达到较好的滤波效果。但是LCL滤波器存在谐振效应,会影响系统的稳态性能,大大增加了整流器控制的复杂性。对基于LCL滤波的PWM整流器采用一种固定开关频率控制策略,不需要电容电压或电流传感器,就可以实现系统的稳定运行。最后的仿真结果证明了方法的可行性。更多还原

【Abstract】 PWM rectifier with LCL filter is more effective at reduced harmonic distortion than the traditional PWM rectifier with the L filter. However, LCL filter has the resonance problem,which affects the stability of the system,which may make the control of the rectifier much more complex. PWM rectifier with LCL filter adopted the fixed switching frequency control to achieve the stability of the system without capacitance sensors. Finally, the results of simulation indicate the correctness of the strategy.更多还原