Coordinated control method for hybrid energy storage system in AC microgrid off-grid state
A hybrid energy storage system and energy storage system technology are applied in the field of coordinated control of hybrid energy storage systems to achieve the effects of improving sustainable regulation capability, prolonging cycle life, and simple principle
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[0029] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0030] like figure 1 As shown, the present invention takes a simplified off-grid AC microgrid as the research object. The microgrid is mainly composed of photovoltaic arrays, single-phase DC-AC converters, lead-acid batteries, lithium batteries, bidirectional DC-AC converters, AC Load and other components. Among them, the photovoltaic array adopts a first-level energy conversion, and is connected to the AC bus of the microgrid through a unidirectional DC-AC converter and a step-up transformer. Under normal circumstances, the unidirectional DC-AC converter adopts a maximum power output control mode to maximize Photovoltaic power generation efficiency; storage battery and lithium battery are res...
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