A Power Management Scheme for Grid-connected PV Integrated with Hybrid Energy Storage System

This paper proposes a grid-connected PV system combined with hybrid storage of super capacitor and battery. The combined super capacitor and battery storage system grips the average and transient power changes, which provides a quick control for the DC-link voltage, i.e., it stabilizes the system and helps achieve the PV power smoothing. The average power distribution between the power grid and battery is done by checking the state of charge (SOC) of a battery, and an effective and efficient energy management scheme is proposed. Additionally, the use of a super capacitor lessens the current stress on the battery system during unexpected disparity in the generated power and load requirement. The performance and efficacy of the proposed energy management scheme are justified by simulation the simulation results can be evaluated by using Matlab/Simulink Software.

Keywords: Hybrid microgrid, power management, hybrid energy storage arrangement, super capacitor, battery