A distributed DC energy storage system without interconnection communication and its control method
A technology of DC energy storage and interconnection communication, which is applied in parallel operation of DC power supplies, DC network circuit devices, and load balance in DC networks, etc. Energy storage unit distributes load power and other issues to achieve the effect of improving droop control accuracy, consistent output, and enhancing reliability
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[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.
[0034] In the example, as figure 1 Shown is a distributed DC energy storage system that does not require interconnection and communication. The system includes a photovoltaic power generation unit, a fuel cell power generation unit, and two energy storage units, which are respectively connected to the DC bus through line impedance to supply power to DC loads. When the power generated by the photovoltaic cell is less than the power required by the load, the two energy storage units discharge at the same time and supply power to the load together with the photovoltaic cell; At this time, the photovoltaic battery supplies power to the load and the energy storage unit at the same time. In the figure, R linea is the equivalent line impedance through which the photovoltaic po...
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