Modified design of an LCL filter for grid-connected, Pulse-Width-Modulated Voltage Source Converter

This paper presents a modified design procedure of an LCL-filter for grid integrated Pulse Width Modulated Voltage Source Converter (PWM-VSC). The proposed method minimizes the required filter's inductor value by 12 % to 16 % (compared to traditional method) with satisfying the required grid integration restrictions on current distortion. In this paper a step-by-step procedure for designing an LCL-filter is proposed and verified by simulations. Also different simulations under different operating conditions are performed to verify the effectiveness of the proposed method. The results are compared with the traditional design method performance.