Research of Non-dead-time Control Method on Single-phase Off-grid Inverter Based on H6 Topology

doi:10.16182/j.issn1004731x.joss.201612028

Abstract

Abstract: A novel non-dead-time control strategy based on H6 topology was proposed. Through detecting the value and direction of the output voltage and current of inductor, the power switches of bridge arm were modulated if they were in the same direction, and the freewheeling switches were modulated if they were opposite. In order to protect the DC bus voltage from shorting out, the dead time should be added during the zero-crossing of voltage and current. And the states of switches were adjusted by calculation of the control module. Then most dead time could be eliminated. The simulation model for the single-phase off-grid inverter based on H6 topology was constructed in MATLAB/Simulink circumstance, in which the non-dead-time control with voltage and current double closed loop was applied. Simulation results show that, compared with dead-time control, the new control method can significantly improve the utilization of DC bus voltage and reduce Total Harmonic Distortion (THD) of output voltage.

Key words: H6 topology, non-dead-time control, the utilization rate of DC bus voltage, THD

CLC Number:

TM464

Xia Kun, Li Jing, Ge Yue, Shen Lirong, Wang Yiming, Xu Po. Research of Non-dead-time Control Method on Single-phase Off-grid Inverter Based on H6 Topology[J]. Journal of System Simulation, 2016, 28(12): 3073-3080.

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