Hybrid Energy Storage System for Large-Scale Renewable Energy Penetration

Penetration of renewable energy on a large scale into the grid poses a huge problem for the stability of the grid due to the variations that arise with most renewable energy resources like solar and wind energy generating systems. This work designs and simulates long-duration power-to-gas systems of hydrogen and SNG energy storages which are coupled to a solar system that can achieve a higher penetration into the grid. A hybrid system of SNG and hydrogen has been designed in HOMERPRO software and this has been evaluated against a system that has hydrogen only, SNG only, and that which has no storage systems. The results show that having a hybrid storage of Hydrogen and SNG with Solar can result in 49.4% renewable energy penetration, a 49.5% decrease in CO2 emissions, and a 14.3 % reduction in the Cost of Energy (COE).