Energy management of PV-battery hybrid system using droop control strategy.

Photovoltaic Power Plants (PVPPs) are one of the most widely used non-conventional renewable energy sources. This paper proposed a PV system that included four PV power plants and each PV power plant is connected with a three-phase inverter to power-sharing and to obtain high efficiency by taking into consideration the effect of shading conditions. A photovoltaic system with a voltage booster connected to a DC to DC converter is described in this paper. The maximum power is the highest operating point specified with a known voltage and current in PV generators. Algorithms for tracking the maximum value using one method of perturbation and monitoring (P&O).In order to keep the power-sharing inaccurate with synchronized operation voltage and frequency with the main grid, the droop control strategy is used. The energy management system is used with proposed control to regulate the power flow between PV, battery system, load, and grid. The proposed system is simulated by MATLAB/Simulink software. The simulation results have shown the proposed power-sharing system with management strategy have effectiveness in reducing the effect of shading condition and keep the system is stable under two operation condition which is grid-connected and islanding modes. [ABSTRACT FROM AUTHOR]