Dual-Comparison One-Cycle Control for Single-Phase Bidirectional Power Converters

Vamanan, Nimesh and John, Vinod (2018) Dual-Comparison One-Cycle Control for Single-Phase Bidirectional Power Converters. In: IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 54 (5, 1). pp. 4621-4631.

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Abstract

Dual-comparison one-cycle control for the bidirectional power flow in single-phase grid-connected converters is proposed in this paper. Advantages of dual-comparison one-cycle control when compared to conventional one-cycle control is that it does not give any steady-state dc offset, no light-load instability, and implements unipolar pulsewidth modulationwithout having to sense the grid voltage. Addition of a fictitious current term, which is generated from the gating signal of one of the active devices, using a bandpass filter, enables the bidirectional power flow. The quality factor of the bandpass filter is shown to impact the total harmonic distortion in current, fundamental displacement angle, and steady-state dc offset. The optimal value of a quality factor, obtained with aid of simulations, gives a superior performance. The current drawn or injected into the grid is seen to lag the grid voltage. The reason for a nonunity displacement power factor is analyzed and a compensation to achieve a unity displacement power factor is also proposed in this paper. Detailed simulation and experimental studies are carried out to validate the proposed control and the high performance that can be obtained.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copy right for this article belong to IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords:	Dual-comparison one-cycle control (DC-OCC); inductive drop compensation; inversion; one-cycle control (OCC); rectification; steady-state dc offset; unipolar pulsewidth modulation (PWM)
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	17 Oct 2018 14:14
Last Modified:	17 Oct 2018 14:14
URI:	http://eprints.iisc.ac.in/id/eprint/60905

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