Indonesian Journal of Electrical Engineering and Computer Science Vol. 24, No. 3, December 2021, pp. 1269~1277 ISSN: 2502-4752, DOI: 10.11591/ijeecs.v24.i3.pp1269-1277  1269 Journal homepage: http://ijeecs.iaescore.com Optimization of wind solar and battery hybrid renewable system using backtrack search algorithm Ingudam Chitrasen Meitei, Rajen Pudur Department of Electrical Engineering, National Institute of Technology, Itanagar, India Article Info ABSTRACT Article history: Received Mar 7, 2021 Revised Oct 13, 2021 Accepted Oct 28, 2021 Penetration of renewable sources to the grid is always a problem for electrical engineers, apart from reliability and efficiency, cost optimization is also a big concern among them. Wind, solar and battery hybrid combinations (WSB-HPS) are also very common among hybrid systems, but this WSB- HPS combines wind and solar energy power generation reduces the charge and discharge time of the battery. Therefore, this system improves the reliability of the power supply by fully utilizing the wind and solar power generation and improves the charging and discharging state of the battery and hence reduces the whole cost as the investment in battery is reduced. backtrack search algorithm (BSA) is the highly efficient and powerful algorithm to solve combinatorial optimization problems. In this paper an attempt is made to optimize the hybrid combination using BSA in the matrix laboratory (MATLAB) environment and comparable study is made using HOMER. A complete optimised data is generated for a particular area in Manipur and reduced cost is suggested. Keywords: HOMER Optimization Renewable hybrid system backtrack search algorithm This is an open access article under the CC BY-SA license. Corresponding Author: Ingudam Chitrasen Meitei Department of Electrical Engineering, National Institute of Technology Itanagar, Arunachal Pradesh Email: alwayschitrasen@gmail.com 1. INTRODUCTION With the discovery of electricity, our life has become safer and easier instead of using oil and gas lamps, which were flammable and dangerous. Ever since the introduction of electricity, people were more eager to harness the power for a variety of purposes ranging from lighting their homes to electric cars in order to make their lives convenient [1], [2]. It helps in the development of a nation and it is the most important source of energy utilization process. Electricity is the foundation of human growth and advancement [3], [4]. However, there are still some major challenges faced by the generating stations when transmitting the generated electricity. Corona effect, radio interference and Ferranti effect are some of the common challenges faced during transmission. New technologies like high-voltage, direct current (HVDC) and facts have already been introduced in the power market for more efficient transmission of electricity [5], [6]. Converters used between the bus bars are also effective. But the effort in transmitting power from generating stations to end users in hilly regions is always difficult because there is an increase in cost due to difficult terrain. Hence this hybrid power system consisting of wind, battery and solar is introduced so that it can be installed near the end users. This helps in the reduction of transmission cost as well as the dependency on conventional energy sources are also decreased [7], [8]. Further cost reduction is expected and consequent climate change mitigation.