Is a three-level bidirectional DC–DC converter suitable for high power energy storage?

8. Conclusion This paper proposed a three-level bidirectional DC–DC converter suitable for high power energy storage system in renewable energy station. The proposed topology without fly-capacitor utilized the BMS control to replace the and split capacitor.

How is power supplied/absorbed by energy storage devices controlled?

The power supplied or absorbed by the energy storage devices is controlled by switching the buck-boost converter. Therefore, it is necessary to obtain the effect of each switching state on the supplied/absorbed power.

What is a bidirectional power flow converter?

Such a converter must have bidirectional power flow capability with flexible control in all operating modes. In HEV applications, BDCs are required to link different dc voltage buses and transfer energy between them. For example, a BDC is used to exchange energy between main batteries (200-300V) and the drive motor with 500V dc link.

What is a bidirectional DC-DC converter (BDC)?

Bidirectional dc-dc converters (BDC) have recently received a lot of attention due to the increasing need to systems with the capability of bidirectional energy transfer between two dc buses.

What is a bidirectional buck-boost DC-DC converter?

The bidirectional buck-boost DC-DC converter is employed to connect the energy storage devices, including the battery and supercapacitor to the DC bus of the hybrid power system.

What is a GaN-based bidirectional three-level DC-DC converter?

In this paper, a GaN-based bidirectional three-level dc–dc converter is designed for high power energy storage application, the voltage stress of switches at battery side is reduced to half of the input voltage without additional capacitor, PCS of battery unit is utilized to keep the stabilization of positive bus and negative bus.