Power control method for composite energy storage system of energy internet
An energy Internet and composite energy storage technology, which is applied in the power control field of energy Internet composite energy storage systems, can solve the problems of difficulty in accurate extraction, increase filtering error, and decompose spectrum aliasing by low-pass filtering, so as to improve efficiency and cost. The effect of ratio and delay avoidance
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[0038] The technical solution of the present invention will be described in detail below in conjunction with the drawings:
[0039] The hybrid energy storage system based on the present invention, such as figure 1 Shown, including: power grid, AC / DC hybrid microgrid, distributed power, load, hybrid energy storage system. The power grid is connected to the AC bus of the AC / DC hybrid microgrid through a grid-connected cabinet. The grid-connected cabinet has a phase-locking function to realize automatic tracking and adjustment of grid-connected frequency and phase; the AC bus is passed through an AC / DC inverter Connected to the DC bus; the hybrid energy storage system is composed of a flywheel, a battery and a fuel cell. The flywheel and the battery are connected in series through a two-way DC / DC and then connected to the DC bus via DC / DC. The DC bus provides (absorbs) active power; (2) The DC bus voltage is stabilized when off-grid. The series topology can give full play to the a...
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