Development of a Hybrid Energy Storage System Composed Battery and Ultracapacitor Supplied from Photovoltaic Power Source for 3- phase 4-wire Smart Micro Grid Structure

Abstract: Solar, wind and other renewable energy sources are becoming an important part of energy supply to the power grid. Integrating a Hybrid Energy Storage Systems (HESS) with renewable energy sources can make these intermittent renewable energy sources more dispatchable. The HESS will play a vital and large role in renewable energy based 3-phase 4-wire grid connected electrical power infrastructure. Because renewable energy is not constant (aside from hydroelectricity) and intermittent, the energy produced from the renewable energy needs to be conserved and used at appropriate times. The proposed HESS made from an ultracapacitor bank and a lead-acid battery bank connected to the 3-phase 4-wire electrical power grid. This process acts as a pilot project for future large scale smart grid applications. The proposed system will be investigated with a capacity sizing estimation of the energy storage system supported by PV based renewable energy source. The energy state modes of the HESS are given demonstrated by simulation results in this study.