Control of Bidirectional AC-DC Converters for DC Microgrid Application

Yuan Sheng Xiong; Shang Xing Ma

doi:10.4028/www.scientific.net/AMM.536-537.1219

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 536-537Control of Bidirectional AC-DC Converters for DC...

Control of Bidirectional AC-DC Converters for DC Microgrid Application

Abstract:

Three-phase bidirectional AC/DC converter acts as a key part in DC microgrid. To improve the stability of DC bus voltage for the grid-connected mode in DC microgrid, a sliding mode or PI controller based on SVPWM modulator is designed for the bidirectional AC/DC converter in inverter mode. When the error between grid-connected current reference value and actual value is larger than the threshold value, the sliding mode controller is used. Otherwise, the PI controller is adopted. The great grid-connected current reference value fluctuation is simulated in PSIM software when the DC microgrid operates in the grid-connected inverter mode. The simulation results show that the gird-connected current actual value can fast track with the reference value. Then the dynamic response performance of DC bus voltage is improved.

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Periodical:

Applied Mechanics and Materials (Volumes 536-537)

Pages:

1219-1222

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.536-537.1219

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Online since:

April 2014

Authors:

Yuan Sheng Xiong*, Shang Xing Ma

Keywords:

Bidirectional Ac/Dc Converter, Dc Microgrid, SVPWM, Σ-ΔModulator

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* - Corresponding Author

References

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