Abstract
In this paper, in a system that combines photovoltaic (PV) and storage battery (BT: battery), DC power bus (DC Bus) is controlled to a constant value for the purpose of supplying electric power to DC load and stable power supply to AC load. In the verification, 24-hour Energy Management System simulation using photovoltaic measurement value is performed on MATLAB/Semolina SimPowerSystems. Check the power of each part, the DC bus voltage and the remaining capacity of battery. As a result, the proposed simulator can maintain the DC bus voltage constant while satisfying the supply-demand balance. Weather patterns can be accommodated, and even if the load changes, the supply-demand balance can be maintained. It is confirmed that the downward trend of the remaining capacity is nearly the same for customers as well due to the weather. By maintaining the DC bus voltage constant, it is possible to construct a highly reliable system compared with the case where the DC bus is not kept constant, and even if it is operated as an independent system independent of the system, stable power without voltage fluctuation Supply becomes possible.
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