Optimization of the RC branch of the LCL filter of a SiC-based inverter

This work begins with the initial design of an LCL filter for a 20 kW SiC inverter, and its response is experimentally analysed from the perspective of grid quality. Based on these results, a sensitivity analysis is carried out by varying the parameters of the RC branch. The objective is to identify the RC branch that achieves maximum efficiency in harmonic content reduction, as well as minimising losses. The conclusions drawn relate to the sizing of the LCL filter and the various possibilities for its optimisation. The conclusions presented have been obtained with regard to the sizing of the LCL filter and the different possibilities for its optimisation. Key words. LCL filter, SiC inverter, filter optimization, harmonic contents.