  Citation: Kumar, Y.V.P.; Rao, S.N.V.B.; Padma, K.; Reddy,C.P.; Pradeep, D.J.; Flah, A.; Kraiem, H.; Jasi ´ nski, M.; Nikolovski, S. Fuzzy Hysteresis Current Controller for Power Quality Enhancement in Renewable Energy Integrated Clusters. Sustainability 2022, 14, 4851. https://doi.org/ 10.3390/su14084851 Academic Editor: Lin Li Received: 18 March 2022 Accepted: 15 April 2022 Published: 18 April 2022 Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affil- iations. Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). sustainability Article Fuzzy Hysteresis Current Controller for Power Quality Enhancement in Renewable Energy Integrated Clusters Yellapragada Venkata Pavan Kumar 1, * , Sivakavi Naga Venkata Bramareswara Rao 2 , Kottala Padma 3 , Challa Pradeep Reddy 4 , Darsy John Pradeep 1 , Aymen Flah 5 , Habib Kraiem 6, * , Michal Jasi ´ nski 7 and Srete Nikolovski 8 1 School of Electronics Engineering, VIT-AP University, Amaravati 522237, Andhra Pradesh, India; john.darsy@vitap.ac.in 2 Department of Electrical and Electronics Engineering, Sir C. R. Reddy College of Engineering, Eluru 534007, Andhra Pradesh, India; snvbrao.eee@sircrrengg.ac.in 3 Department of Electrical Engineering, Andhra University College of Engineering (A), Visakhapatnam 530003, Andhra Pradesh, India; kottalapadma.ee@auvsp.edu.in 4 School of Computer Science and Engineering, VIT-AP University, Amaravati 522237, Andhra Pradesh, India; pradeep.ch@vitap.ac.in 5 Energy Processes Environment and Electrical Systems Unit, National Engineering School of Gabes, University of Gabes, Gabes 6029, Tunisia; flahaymen@outlook.fr 6 Department of Electrical Engineering, College of Engineering, Northern Border University, Arar 73222, Saudi Arabia 7 Faculty of Electrical Engineering,Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland; michal.jasinski@pwr.edu.pl 8 Power Engineering Department, Faculty of Electrical Engineering, Computer Science and Information Technology, University of Osijek, 31000 Osijek, Croatia; srete.nikolovski@ferit.hr * Correspondence: pavankumar.yv@vitap.ac.in (Y.V.P.K.); habib.kraiem@yahoo.fr (H.K.) Abstract: Steady increase in electricity consumption, fossil fuel depletion, higher erection times of conventional plants, etc., are encouraging the use of more and more onsite renewable energy. However, due to the dynamic changes in environmental factors as well as the customer load, re- newable energy generation is facing issues with reliability and quality of the supply. As a solution to all these factors, renewable energy integrated cluster microgrids are being formed globally in urban communities. However, their effectiveness in generating quality power depends on the power electronic converters that are used as an integral part of the microgrids. Thus, this paper proposes the “Fuzzy Hysteresis Current Controller (FHCC)-based Inverter” for improving the power quality in renewable energy integrated cluster microgrids that are operated either in grid-connected or autonomous mode. Here, the inverter is controlled through a fuzzy logic-based hysteresis current control loop, thereby achieving superior performance. System modelling and simulations are done using MATLAB/Simulink ® . The performance analysis of the proposed and conventional inverter configurations is done by computing various power quality indices, namely voltage characteristics (swell, sag, and imbalance), frequency characteristics (deviations), and total harmonic distortion. The results reveal that the proposed FHCC-based inverter achieves a better quality of power than the traditional ST-PWM-based multilevel inverter in terms of IEEE/IEC/EN global standards for renewable energy integrated cluster microgrids application. Keywords: cluster microgrids; fuzzy logic; hysteresis current control; microgrids; power quality; renewable energy sources; urban community 1. Introduction Energy is a key component of any country’s economic development. In the twenty-first century, people in both urban and rural areas around the world have higher and more sophisticated demands for their quality of life. Urbanization is expected to account for Sustainability 2022, 14, 4851. https://doi.org/10.3390/su14084851 https://www.mdpi.com/journal/sustainability