University of Tehran Journal of Solar Energy Research 2588-3097 8 3 2023 07 01 An Uninterrupted Fuzzy-Based PV-BES System for Improving Power Quality in Grid-Connected Systems 1622 1634 94328 10.22059/jser.2023.359127.1304 EN Boyanasetti Venkata Sai Thrinath Electrical and Electronics Engineering, Mohan Babu University (Erst while Sree Vidyanikethan Engineering College), Tirupati, India. Chevala Venkata Ramana Electrical and Electronics Engineering, JNTU-GV University College of Engineering,Vizianagaram,India. Banoth Meghya Nayak Electrical Engineering, Arvind Gavali College of Engineering,Satara,Maharastra,India. Baala Yashashwini Electrical and Electronics Engineering, Sree Vidyanikethan Engineering College, Tirupati,India Nathella Munirathnam Giri Kumar Electrical and Electronics Engineering, Mohan Babu University (Erst while Sree Vidyanikethan Engineering College), Tirupati, India. Parimalasundar Ezhilvannan Electrical and Electronics Engineering, Mohan Babu University (Erst while Sree Vidyanikethan Engineering College), Tirupati, India. Journal Article 2023 05 18 This article proposes a technique to improve power quality and eliminate current and voltage harmonics. The robustness of the system functioning in various operating modes is the key contribution of this research. Research findings demonstrating the PV array insulation, load variation, and grid unavailability are employed for transitioning between modes and are used to assess the performance of a grid-interfaced PV-BES (Battery Energy Storage) system. The system also operates in constant and variable power modes to provide power smoothening and reduce the load on the distribution grid during peak demand. This system also turns out to be capable of operating in an islanding mode to provide the load with uninterrupted power. For this, a grid-tied voltage source converter (VSC) with effective control logic is designed. A PI controller was used in the existing model to enhance the system's performance, but due to various disadvantages, a fuzzy logic controller has been implemented in the proposed system, which has more advantages and aids in suppressing harmonics and enhancing the reliability of the power. Consequently, a comparison of the controller is done in this article. For implementing the performance of this system, MATLAB/Simulink software is used. https://jser.ut.ac.ir/article_94328_04ef9f43de8ddd4468534e88e75f5bf1.pdf