Harmonic Mitigation in Grid-Connected Distributed Energy Systems using PI and Fuzzy Logic Controller

In recent years, the distributed generation systems have been established swiftly with the benefits of zero pollution. But, the harmonics increase due to various loads connected to the distribution system and cause disturbances in the power lines. To overcome such issues, this paper proposes a grid interfacing control using Fuzzy logic-based PI controller. The main intention of the proposed approach is to mitigate the harmonics in an electric grid using fuzzy logic-based PI controller. In addition to this, the control for interfacing inverter is done utilizing the hysteresis current controller . The simulation results are performed to show the performance of the compensating device to reduce the harmonics. In order to evaluate and determine the total harmonic distortion, the fast Fourier transform has been carried out for certain waveforms. Therefore, from the analysis, it is proven that the power quality is enhanced by fuzzy logic-based PI controller when compared with the ordinary PI controller.