面向并网应用的超级电容DC-DC变换器简易结构控制

The bi-directional DC-DC converter(DDC)is com-monly employed for a battery or supercapacitor(BA/SC)to accomplish power management flexibility.Current and voltage control for the DDC is crucial for power management.Focusing on control of the DDC,this paper first proposes a simple order-reduction control method for the first-order system,then applies the proposed control method to current and voltage control of the SC DDC.The effect of the inner current loop on the outer DC bus voltage loop is also analyzed.With the proposed simple order-reduction control method,the dynamic response of the SC DDC is obviously improved,and robustness to the SC voltage variation is achieved.The double-line-frequency ripple is also eliminated through the proposed simple and effective method.Finally,the effectiveness of the developed control algorithm is tested by the experiment.