1P3S HIGH FREQUENCY TRANSFORMER BASED DUAL-ACTIVE BRIDGE DC-DC CONVERTER

Öz

The dual active bridge DC-DC converter topology gains developing application area in renewable energy systems, electric vehicles, power quality devices etc. due to its structural and functional advantages.

In this paper, a new dual active bridge (DAB) based DC-DC converter equipped with an isolated high frequency transformer with 1 primary / 3 secondary windings is proposed which is composed of three voltage source converter (VSC) in the secondary side and a voltage source converter in the primary side. Each voltage source converters have own dc links.  The single phase shift modulation (SPS) method that is the commonly used control method in high power transfer applications is used for each voltage source converters independently to achieve bidirectional power flow of DC-DC converter. The phase shift modulation is implemented by PI controller. The power flow between the dc-links are provided by VSC’s own phase shift angles. Moreover extended phase shift (EPS) modulation and dual phase shift (DPS) modulation is also implemented to the system to control the power flow. Performance comparison of modulation methods is also done in the study. To validate the proposed system, a simulation model has been developed for 10 kVA rating using MATLAB/Simulink. The performance of the proposed system is verified with various case studies.

Anahtar Kelimeler

• Dual active bridge,H bridge,DC-DC converter,Phase shift modulation

Kaynakça

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