An Efficient Grid Integrated Hybrid Renewable Energy System with Battery Storage Using SEPIC Converter

The two most promising energy sources that are readily available in our nation are solar and wind, which help to protect the environment while simultaneously boosting the nation’s economic well-being. The design and operation of a grid-connected hybrid energy source utilizing solar, wind and battery is demonstrated in this work. The proposed work was incorporated with the SEPIC converter due to its high voltage gain and efficiency with reduced ripple current, which is regulated by the PI controller. Moreover, the PWM generator is employed to produce pulses for the operation of the SEPIC converter. Three-phase VSI is utilized to convert the DC link voltage to AC to distribute power to the grid system. An AC output voltage is produced by a wind energy system based on a Doubly Fed Induction Generator (DFIG); through the use of a PWM rectifier, AC voltage is converted to DC effectively. The additional energy obtained from the hybrid PV/wind system is efficiently stored in the battery system, and an integrated battery converter allows the battery to be charged and discharged according to the battery needs. In the event of power unavailable from the wind and PV, the stored energy in the battery is utilized to distribute power to the grid system. The overall proposed system is applied in MATLAB/Simulink to validate the prominence of developed work, and it is contrasted with the other conventional topologies. By utilizing the developed SEPIC converter, low THD of 2.83%, high efficiency of 93.8% and high voltage gain of 1:8.9 are attained.