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There is power circulating flow in dual-active-bridge(DAB) dc-dc converter under the traditional single-phase-shift(SPS) control, and this is the main factor contributing to larger current stress and larger converter loss. In order to eliminate the power circulating flow and reduce the current stress, this paper proposes a novel dual-phase-shift(DPS)control method. By analyzing the operating principle...
This paper is focus on the application of a AC-DC matrix converter (MC) in the battery energy storage system (BESS). The converter topologies of the energy storage system are discussed. A combined control strategy of the AC-DC based BESS is proposed according to the modulation method. At the battery side, the constant current/voltage charging and constant current discharging control are utilized to...
The matrix converter is a single-stage ac–ac power conversion device without dc-link energy storage elements. Any disturbance in the input voltages will be immediately reflected to the output voltages. In this paper, a modified space vector modulation strategy for matrix converter has been presented under the abnormal input-voltage conditions, in terms of unbalance, nonsinusoid, and surge (sudden...
Due to lack of dc-link energy storage elements in the matrix converter, any disturbance in the input voltages will be immediately reflected to the output voltages. In order to guarantee safe and stable operation of matrix converters under abnormal input voltage conditions, the paper proposes an improved method to real-time calculate voltage modulation ratio using the space vector magnitude of output...
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