Design of LCL Filter for SPWM Inverter Based on Switching Frequency and THD Criterion

Over the time, power generation from renewable energy sources and its grid integration is being increased rapidly. Subsequently, the quality of power has been degraded because of injected harmonic contents to the grid from large number of power electronic devices required for inverter applications. An optimized LCL filter can improve the quality of power for single-phase inverter connected with the utility. This perspective motivates the authors to design an LCL filter with optimum performance under the constraint of least switching frequency variation, total harmonic distortion (THD), size of the inductors, and power factor of the grid current. All the results have been obtained through MATLAB/Simulink environment in justification with the optimum satisfactory design.