Effects of different batteries and dispatch strategies on performance of standalone PV/WT/DG/battery system: A case study

The idea of integrated hybrid renewable energy systems (IHRES) is gaining attention for electrification of rural areas where on‐grid electricity supply is uneconomical. From this point of view, the technical and economic feasibility analysis is carried out for a standalone IHRES in a remote area of Malnad region in Karnataka, India. Solar and wind energy are the prominent renewable resources available in the selected area for study. In the present study, lithium‐ion, lead‐acid and zinc‐bromide batteries effect on “PV‐WT‐DG‐Battery” system is examined and compared. The control strategies used in the study are “load following (LF)” and “predictive dispatch (PD).” The simulation results reveal that the “cost of energy (COE)” and “net present cost (NPC)” are found to be low in zinc‐bromide batterybased system with “PD control strategy.” The NPC and COE are found to be $55 262 and $0.35 per kWh for optimal system. Zinc‐bromide batteries are best suited for remote electrification with less load demand. The sensitivity analysis shows that there is a minimal effect on the performance of the planned IHRES upon variation in the “inflation rate,” “discount rate,” and “diesel price.”