Implementation of OPPT in Wind-PV-Battery Based Hybrid Power System

Abstract

As the globe moves towards renewable energy resources (RERs) to meet its energy needs, nations are focusing on increasing the proportion of RERs in their overall energy consumption. RERs not only provide a cleaner and greener option, but are also abundantly accessible. The widespread use of RERs in today's electricity grid has led to issues like RER intermittency and weather dependence. To solve these issues, two or more RERs are utilised with storage. The two RERs chosen for this paper are wind and solar. Battery bank is used as a storage device to supply electricity when solar and wind production is less than demand. A control strategy for charging/discharging the battery system is designed to enable the battery to charge/discharge as needed.

But there are times when generation exceeds demand and the battery is completely charged. In this scenario, surplus electricity is directed to dump load. But his plan need another converter. OPPT is designed to remove the need for a dump load. The OPPT enables the PV system to generate maximum power when the load is less than the generation. When generation exceeds demand and battery bank is completely charged, OPPT kicks in and reduces PV system generation to match load and removes the need for dump load. The suggested control approach also keeps the system's DC link voltage substantially below safe limits.

Each component of the system is simulated in MATLAB/Simulink, and results are obtained under various operating circumstances such as wind speed, sun irradiation, and load. The suggested approach works well in all circumstances.