Abstract
In this paper, control and energy management of a grid-connected PV-Battery hybrid power system are investigated. In this configuration power transfer from the photovoltaic system as a primary energy source and battery storage to the distribution grid is accomplished using double-stage conversion made up of a pair of DC-DC converters and a three-phase three-level diode clamped inverter (DCI). An appropriate power management strategy is adopted to manage the power flow between the converters and the load in order to maintain the power balance in the system. The resulting power system is not only able to extract the maximum power from PV generator, but also to achieve sinusoidal grid currents, and to guarantee reactive power compensation. At the end, some simulation results are given to test the viability of the proposed system at various operating conditions.
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