Abstract
In power system control unicontrol with single storage units or centralized control with multiple storage units to meet different level targets is challenging. Considering the charge and discharge characteristics of storage devices, this paper proposes a hierarchical configuration structure of a battery and supercapacitor mixed storage scenario, and develops a convenient control method for accessing various DC loads and can central manage mass batteries in one place. Aiming at the optimal management of large scale battery storage, the paper proposes a three-layer battery hierarchical control structure and the control objects and control circuits are discussed. Simulation studies are used to verify the control effect of the hierarchical storage system and the results show that the strategy can effectively decrease photovoltaic output fluctuation.
Highlights
As the cost is continuously decreasing, photovoltaic (PV) generation has become one of the most important renewable energy sources and is being widely used
Energy management of hybrid energy systems is significant against the background of wide application of photovoltaic generation
This paper models photovoltaics, storage batteries and supercapacitors, and introduces a typical distribution network structure with hierarchical storage
Summary
As the cost is continuously decreasing, photovoltaic (PV) generation has become one of the most important renewable energy sources and is being widely used. Some researchers have studied storage charge and discharge control strategies based on hybrid energy storage. Tummuru proposed a fast acting DC-link voltage-based energy management schemes for a hybrid energy storage system (HES) fed by solar photovoltaic (PV) energy. Based on control the aforementioned of device previous can be in found that moststructure, research only considers the effect of eachreview storage or works, hybrid itstorage a centralized and considers the control effect of each storage device or hybrid storage in a centralized structure, and little work has been done to study the configuration pattern of different energy storage systems. Configuring different energy storages reasonably and hierarchical control strategies need. Configuring different energy storages reasonably and hierarchical control strategies still need further study. This paper proposes an energy management strategy based on a hierarchical storage structure. Simulation is carried out to verify the control effect
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