A Novel Controller for Microgrid Interactive Hybrid Renewable Power Sources P. Kavitha * and P. Subha Karuvelam Government College of Engineering, Tirunelveli, 627007, Tamilnadu, India *Corresponding Author: P. Kavitha. Email: kavitha.paulsamy6@gmail.com Received: 26 August 2021; Accepted: 05 January 2022 Abstract: In this paper, a self-sufficient electric power generation is proposed by using hybrid renewable sources like solar and wind turbines to favor a smart and green environment. This distributed generation unit is connected to the grid through an 3Φ inverter. The power drawn from the hybrid unit is stored in the batteries to transfer power during the non-availability of power sources. This stan- dalone power conversion and storage system are developed by using power elec- tronic converters and controllers to ensure balanced power flow operation. A PI (Proportional Integral) controller is utilized for generating the PWM (Pulse Width Modulation) pulses for the wind side converter. The GWO (Grey Wolf Optimiza- tion) optimized PI controller is used to control the PV (Photovoltaics) side SEPIC (Single-Ended Primary-Inductor Converter) for improvising the transient response of the system. The generated power is interfaced with grid through a three phase inverter, which is controlled by dq (Direct-axis and Quadrature-axis) theory. The power quality problems are effectively eliminated with the proposed converters. Thus, a continuous stable power is fed into the grid through the proposed approach. An automatic control is enabled for easy operation. The system is mod- eled in MATLAB and a prototype is developed to verify the simulation results. Keywords: PV and Wind power system; SEPIC converter; GWO-PI controller; microgrid 1 Introduction The current is one of the essential inventions of science and so it is not possible to think the world without electricity. However, many places in the globe still have no reliable and quality power. The total required gross power of India in the period of 2018–2019 is 1,181 kWh per capita. Though most of the remote areas are declared as electrified, the total demand is not completely met, which leads to more power supply issues. Due to unplanned and planned outages, various electricity demands are left unsatisfied. The natural and man-made reasons like overloading, snapping and short circuiting have caused unexpected disruptions. Even in the power availability, it is found that the voltage is reduced and unbalanced. A routine power cuts are also performed by companies for the economic interest. Industrialization is one of the important factors in developing the energy security. The distributed generations utilize the locally available renewable sources (wind, solar, biomass, and small hydro) to This work is licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Intelligent Automation & Soft Computing DOI: 10.32604/iasc.2022.023035 Article ech T Press Science