What are the applications of bidirectional energy transfer (BDC)?

ty of bidirectional energy transfer between two dc buses. Apart from traditional application in dc motor drives, new applications of BDC include energy storage in renewable energy systems, fuel cell energy systems, hybrid electri

Why is battery a suitable energy storage system?

The expanding share of renewable energy sources (RESs) in power generation and rise of electric vehicles (EVs) in transportation industry have increased the significance of energy storage systems (ESSs). Battery is considered as the most suitable energy storage technology for such systems due to its reliability, compact size and fast response.

Why is bidirectional DC/DC converter important in battery-based hybrid ESS?

Due to the highly dynamic required battery output current, the battery’s voltage variation is also highly dynamic. As a crucial interface between the lithium-ion battery and DC bus, the control of bidirectional DC/DC converters plays a critical role in the application of battery-based hybrid ESSs.

What is a bidirectional DC–DC converter?

In addition, to realize energy recovery, the bidirectional DC–DC converter is required between the power battery or SC and vehicle bus to realize the flow of feedback energy. Therefore, the bidirectional DC–DC converter is the key component of HESS. It determines the performance of HESS and further affects the performance of the powertrain of NEV.

How does a battery energy storage system work?

The battery, controlled by the non-isolated DC/DC converter, can limit the charging and discharging current based on the battery’s SOH. This capability envisions an extended battery service life. In , a novel modular, reconfigurable battery energy storage system is proposed.

What are the benefits of using bi-directional converters?

Bi-directional converters reduce peak demand tariff, reduce load transients, and provide V2G capabilities with quick power transfer direction changes. They also offer high efficiency (>97%) at power levels up to 22KW. These converters use the same power stage to transfer power in either direction in a power system.