A large-scale energy storage device and its main circuit
An energy storage device, large-scale technology, applied in circuit devices, battery circuit devices, current collectors, etc., can solve problems such as no example of large-scale energy storage applications, avoid failure and shutdown conditions, protect reliable, access The effect of a wide voltage range
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[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0036] Note: The AC / DC or AC / DC (DC / AC) modules below and in the drawings all refer to converters.
[0037] Main circuit embodiment
[0038] figure 1It is the circuit topology of the energy storage device in which each AC port corresponds to a group of DC ports, each AC port corresponds to an energy storage unit, and the power of each unit is 250kW. Each unit includes a converter on the grid side and a DC / DC on the DC side. As shown in the figure, there are two converters (1#AC / DC, 2#AC / DC), and the DC side of each converter is connected with five DC / DC modules, and one end of each DC / DC module is connected to the converter The other end corresponds to a pair of DC ports, and each pair of DC ports is used to connect a group of energy storage batteries. The converter is a three-phase rectification (inversion) module. The DC side of the converter is connec...
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