Parameter Designing Method of Active Damping LCL Filter For Grid-Connected Inverter

A new era of the invention, the demand for renewable energy has increased. The high-quality power supply is required. The theme of this paper is to describe the complete step by step designing procedure of an active damp LCL filter for grid-connected inverter and control scheme as well. The topology structure of a power supply is, an active damp LCL filter is placed between the inverter and utility of power grid supply to reduce the inverter side switching harmonics. The proposed LCL filter designing method has been optimized with different levels of switching frequency. An extensive mathematical modeling scheme has been submitted for parameter designing of the LCL filter. To achieve high resonance frequency performance of the LCL filter, the different designing criteria of the inverter side inductor, and gird side inductor is defined. Through the proposed technique, try to overcome the size and increase the harmonic mitigation capability of the LCL filter. For control purpose, inner current loop and outer voltage loop is defined. The outcome of the simulation result verifies the worth of designing a scheme of the LCL filter.