Grid power quality enhancement using an ANFIS optimized PI controller for DG

Abstract Grid frequency variation causes phase angle deviation in current with respect to voltage. This is sensed at the phase-locked loop controller. In past studies effect of grid neglected while designing controller for power quality restoration. When modern grids are connected large numbers non-linear loads and various types distributed generation (DG), it results continuous frequency. Thus necessary consider effective However, tuning conventional PI gains considering very difficult. develop an adaptive intelligent nonlinear tackle effects variation, voltage distortion load simultaneously. paper presents importance load, deploying a The proposed supplies local as well transferring surplus from DG along additional benefit improving quality. A ANFIS optimized enhancement proposed. method economical requires no hardware. Results compared PI, PI-RC fuzzy controllers validate effectiveness