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A novel strategy of dead-time elimination and compensation for grid-tied inverters
Author(s): 
Pages: 30-35
Year: Issue:  5
Journal: Relay

Keyword:  grid-tied inverterdead-time effectzero-current clampingeliminationcompensation;
Abstract: A novel dead-time elimination and compensation method based on full analysis of the feature of the grid-tied inverter and zero-current clamping phenomenon is presented to eliminate the dead-time effect of grid-tied inverter. The effective switch transistor is chosen according to the direction of grid current in the non-zero current zone and the control strategy is feed-forward compensation in the zero current zone. In comparison with traditional dead-time elimination and compensation methods, the proposed method can better restrain the output distortion in the zero current zone, effectively eliminate the dead-zone effect, reduce THD, and thereby improve grid-connected current quality due to full consideration of zero-current clamping phenomenon. The Matlab/Simulink simulation results demonstrate the effectiveness and validity of the proposed method.
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