Abstract
With the battery charging or discharging, it can effectively stabilize power fluctuation of the photovoltaic generation (PV) or the load in a stand-alone power generation system. In this paper, based on the mathematical models of the PV and the battery, it connected the PV and the battery on the same DC bus and proposed energy management system with hysteresis control on the DC bus. In order to prevent the battery from switching back and forth among working state and stopping state, the outer voltage loop took the nonlinear function control strategy of the battery. With the inverter adopting voltage frequency (V/f) control strategy, it maintained the voltage and frequency on AC bus. With the PSCAD/EMTDC, it analyzed the ability of the battery stabilizing the power fluctuation of the PV or the load. And it proved the correctness and feasibility of the established models and control strategies. So those provided theoretical reference for the photovoltaic system that was employed efficiency in the remote areas.
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