Power Quality Analysis by using Active Filter in AC/DC Microgrid

Abstract

Power supply to rural area has always been a major challenge due to their distance from the power generation plants. It is highly capital intensive to design and maintain long distance transmission line. Rural area with marginal or no axis to primary grid bar can get power supply from microgrid Fortunately, technology exist that can give the assurance of quality of electricity in an isolated area which is for away from the regular power network. The present scenario is the coexistence of both AC and DC micro grids, because of the evolutions of different types of loads. The hybrid microgrid concept assume a cluster of different types of loads and distributed generator operating as a controllable system which maintain the quality of power and its stability to its local area. Power system harmonics are caused due to certain highly nonlinear loads. These harmonics do have undesirable effect of the performance on the synchronous and induction machines, telephone interference, and power capacitor failures. Because of the increment in quantum of Total harmonic distortion, lead the power factor redactor, induction heating and some power losses, ultimately reduces the efficiency of the system. Therefore, we propose a harmonic mitigation technique introducing the active filter for multiple load and calculate the total harmonic distortion for the of the supply. The different filter has been investigated for power quality enhancement in microgrid. The performance of various filter are compared and active filter is found to be the best solution to get purely sinusoidal signals. The Simulink work is done by taking the MATLAB 2014 software .