Copyright: © the author(s), publisher and licensee Technoscience Academy. This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited International Journal of Scientific Research in Science and Technology Print ISSN: 2395-6011 | Online ISSN: 2395-602X (www.ijsrst.com) doi : https://doi.org/10.32628/IJSRST 455 Implementation and performance Analysis of Grid Connected PV-Wind- BES system under Critical Load Conditions O. Thireesh 1 , P. Ramesh 2 , G. Charitha 3 , U. Madhuri 4 , SK. Anwar 5 , V. Prem Kumar 5 1&2 Assistant Professor, 3, 4,5&6 UG Student 1,2,3,4,5&6 Electrical and Electronics Engineering, Sree Venkateswara College of Engineering-Nellore, Andhra Pradesh, India Article Info Volume 9, Issue 3 Page Number : 455-466 Publication Issue May-June-2022 Article History Accepted : 01 June 2022 Published : 07 June 2022 ABSTRACT This research work presents, an implementation of micro-grid system by interconnecting the renewable energy sources of photovoltaic (PV) and wind power generation (WPG) along with a battery energy storage system (BESS). The renewable energy sources plays an important role to produce electrical energy without using any fossil fuels. Because of fossil fuels based power generation produce environmental pollution and also increases load demand on system which leads shortage of fossil fuels due to this power outages may be occurs. Because of this reason, this paper investigate the performance of renewable energy sources like PV-WPG system. The PV and WPG system mainly depends upon environmental changes and connected load. So, these two systems (PV-WPG) form the micro grid and controlled by MPPT topology. The MPPT strategy helps to produce maximum power from this two system (PV-WPG).This microgrid performance tested under different environmental changes and critical load conditions in this paper. This proposed work implemented and tested in MATLAB/SIMULINK software. Keywords : Photovoltaic System, Wind Power Generation, Microgrid, Battery Energy Storage System. I. INTRODUCTION India has suffered a significant energy issue in the last decade as a result of population expansion, and it is largely reliant on fossil fuel imports. Renewable energy is now a viable option for meeting electricity demand. Because of its benefits, its integration has gotten a lot of attention. Photovoltaic (PV) and Wind Turbine (WT) systems, for example, have become particularly appealing because to their widespread availability, technological advancement, and economic benefits. The hybrid combination of the two avoids mutual intermittences, increasing system reliability. More and more, Hybrid Renewable Energy Systems are becoming a necessary technique for distributing electrical energy to remote and inaccessible places. Hybrid generation