Optimization of Energy Storage System in a Hybrid Power Generation Unit Incorporating Ultra Capacitor Technology

Abstract

Efficient supply of electric energy, maintaining power quality, and addressing newlineintermittency of renewable energy and unpredictable demand fluctuations are newlinechallenges of a hybrid power generation. An individual energy storage technology newlineseldom provides all the desired characteristics expected. A Hybrid Energy Storage newlineSystem (HESS) including different types of energy storage systems can address these newlinechallenges. In this work a new formulation and algorithm was developed that optimally newlinedesigns a grid-connected HESS for desired performances such as peak load shaving and newlinepower demand curve smoothening at the least capital cost. The proposed HESS newlinecomprised of a combination of Lithium Ion batteries and Ultra capacitor based Energy newlineStorage Systems. Real and synthetic power demand dataset representing different types newlineof demand fluctuations were used in the analysis. The proposed formulation and newlinealgorithm was able to optimally size HESS such that it costs the least while performing newlinein the desired manner. Also a comparative analysis of proposed energy storage system newlinefor hybrid power generation is performed compared to a thermal power generation newlineunit. The similar data is used for the comparison purpose. Economic analysis is newlineperformed for the thermal and hybrid system in Homer pro software for validating the newlinefeasibility of proposed work. newlineThe interest of present-day energy sector is turning towards the renewable newlineenergy systems. Out of several renewable sources of energy, solar photo-voltaic newlinesystems, in particular, is gaining leverage over other renewable sources of energy. It is newlinealso suited for distributed systems. Installation of large power plants, based on newlineconventional fuel, are becoming uneconomical because of reasons such as fulfilling newlinethe strict environmental norms of the state; to deal with the issue of owning right of newlineway for installation of high voltage transmission systems and concerns related with the security of the overall installation. Furthermore, with the advancement in power newlineelectronics technology and developm