LCL-filter design for grid-connected three-phase inverter using space vector PWM

This paper proposes a LCL-filter design for grid-connected three-phase inverter using space vector pulse width modulation (SVM). There is a variety of studies in progress. However, the existing methods have an error because they are not applicable in SVM. This paper presents the design method of LCL-filter that optimized for SVM switching operation. The LCL-filter design procedure performed step by step. Inverter-side inductor was obtained by mathematical analysis of the ripple components of the grid current according to the switching state. Filter capacitor was chosen by consideration of the reactive power absorption ratio. Grid-side inductor was designed by ripple attenuation factor of the output current. The effectiveness of the described design method of LCL-filter is verified by simulation.