Design and Simulation of Hybrid Renewable Energy System with Hybrid Storage System for Standalone Application
Abstract
In the present era, daily demands of power by consumers are mostly fulfilled through conventional energy sources like oil, natural gas, and coal. Since conventional energy resources are not infinite, and the day by day need for energy is getting higher, the importance of the non-conventional energy sources like wind and solar energy is more than ever. For this project, design and implementation for a hybrid renewable energy system of solar and wind power using MATLAB/Simulink platform far standalone application is proposed. The solar structure is designed using PV array system of 100 kw which is adjusted to a 25-kV grid and the wind energy system is designed using MPPT technique to deliver 10 KW of power. The two models are then integrated using a statistical approach before uploading it onto the utility grid. Two scenarios of UK and Saudi Arabia were used to test the validity of the approach. Simulation results obtained showed that for individual simulation, with respect to the I-V characteristics, current retains a stable conduct for the solar system at the preliminary voltage phase. However, when the voltage increases, the current's fixed performance alters when it crosses 200 V and more for 1 module, and 250 V and more for the whole module. In case of wind energy system simulation, the power curve started near zero when the pitch angle is small. It then increases eventually with its peak power dependent on the speed and then falls back to zero. As for the integrated solar wind energy system, simulation results showed that the power transmission voltage system is capable of meeting the demand of electricity for an isolated system. For the PV system, it was observed that there is a big difference in output for the same cell. In Saudi Arabia, the power output by the cell is around 300 W, but in UK, the power output by cell decreased to 180 W at different weather parameters. This led to increase in the number of PV cells in UK to cover the required load. The design in UK changed to 15 cells in parameters and 17 cells in series to meet the load. The current in Saudi Arabia was 8A but in UK, it was 6A. In terms of energy storage, the same behaviour was observed in both the UK and Saudi Arabia where the state of the charge of battery was 50% at the beginning of the simulation and it increases until it reaches 59 % at the end of the simulation. However, the super capacitor state of charge decreases from 92.2% to 91.3% at the end of the simulation.