Enhanced Method of Mitigating Voltage Sags and Swells Using Optimized Fuzzy Controlled DVR

Recently, power quality becomes a major concern in Power Distribution System. To maintain power quality, the occurrence of voltage disturbances has to be detected and compensated. Disturbances such as voltage swell, voltage sag, and transients will cause severe problems to the electrical devices. In this paper, a fuzzy-based Dynamic Voltage Restorer tuned using particle swarm technique was proposed to mitigate the above disturbances. The performance of Dynamic Voltage Restorer is enhanced by the fuzzy controller to control the direct and quadrature voltage components. Optimized tuning through particle swarm optimization helps to achieve an accurate compensation under various fault conditions and nonlinear loads. This proposed scheme shows an ultimate performance in quick detection and mitigation compared to the existing methodologies. Also, the Total Harmonic Distortion caused by the power electronic components gets reduced considerably. Finally, simulations are carried out using MATLAB/SIMULINK platform and the effective results are validated.