Design of LCL Filter for DC Converter by Using Analytical Equations

Inhalt:
This paper proposes a design method of the DC inverter LCL filter based on the buck circuit to improve the power quality. The LCL filter reduces output ripple current and ripple voltage and improves the power quality. Two design methods are given in the article. The first method is to design an LCL filter without feedback. Another way is to design an LCL filter with feedback through transfer function and Fourier transform. Finally, the influence of the LCL filter developed using two different methods on the circuit is compared and analyzed through modelling and simulation results.