Bidirectional Power Flow Control and Hybrid Charging Strategies for
The objective of this article is to propose a photovoltaic (PV) power and energy storage system with bidirectional power flow control and hybrid charging strategies.
Federal facilities and their fleets serve critical missions that may be compromised or require backup power in the event of a grid outage. As the federal government moves toward fleet electrification, site decarbonization, and deployment of local distributed energy resources (DERs), agencies should consider both managed and bidirectional charging.
In addition, with the proposed strategies, the bidirectional charging/discharging capability of the battery is able to achieve the maximum PV power utilization. All the proposed strategies can be realized by the digital signal processor without adding any additional circuit, component, and communication mechanism.
The integrated photovoltaic, storage and charging system adopts a hybrid bus architecture. Photovoltaics, energy storage and charging are connected by a DC bus, the storage and charging efficiency are greatly improved compared with the traditional AC bus.
Therefore, bidirectional power flow control strategies are proposed to achieve the maximum PV power utilization as well as to realize the hybrid charging methods. In addition, with the proposed strategies, the bidirectional charging/discharging capability of the battery is able to achieve the maximum PV power utilization.
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