Examinando por Autor "Chen, Linglin"

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    Ítem
    Advanced Modulations for a Current-Fed Isolated DC-DC Converter with Wide-Voltage-Operating Ranges
    (Institute of Electrical and Electronics Engineers Inc., 2019) Chen, Linglin; Tarisciotti, Luca; Costabeber, Alessandro; Gao, Fei; Wheeler, Patricka; Zanchetta, Pericle
    An active-bridge-active-clamp (ABAC) topology with its associated switching patterns and modulation techniques is introduced in this paper. The topology has been designed to comply with stringent power quality requirements in a More Electric Aircraft application. The dual transformer secondary structure of the ABAC allows the definition of a particular phase shift-based switching pattern. The proposed switching pattern ensures not only the output current switching harmonics elimination but also even power sharing between the secondary half-bridges. Consequently, passives on the low-voltage side of the converter are minimized, and transformer dc bias is eliminated. All these features can be achieved independently from the operating point of the converter. In this paper, the basic operation of the ABAC converter is first introduced. The theoretical analysis of switching harmonics elimination and power sharing is then carried out in the development of the proposed switching patterns. The theoretical claims are validated by both simulation and experimental results on a 10-kW 270-V/28-V ABAC converter. © 2013 IEEE.
  • Miniatura
    Ítem
    Model Predictive Control for Dual-Active-Bridge Converters Supplying Pulsed Power Loads in Naval DC Micro-Grids
    (Institute of Electrical and Electronics Engineers Inc.v, 2020-02) Chen, Linglin; Shao, Shuai; Xiao, Qian; Tarisciotti, Luca; Wheeler, Patrick W.; Dragičević, Tomisla
    Pulsed power loads (PPLs) are becoming prevalent in medium-voltage naval dc micro-grids. To alleviate their effects on the system, energy storages are commonly installed. For optimal performance, their interface converters need to have fast dynamics and excellent disturbance rejection capability. Moreover, these converters often need to have voltage transformation and galvanic isolation capability since common energy storage technologies such as batteries and supercaps are typically assembled with low-voltage strings. In order to address these issues, a moving discretized control set model predictive control (MDCS-MPC) is proposed in this paper and applied on a dual-active-bridge converter. Fixed switching frequency is maintained, enabling easy passive components design. The proposed MDCS-MPC has a reduced prediction horizon, which allows low computational burden. The operating principle of the MDCS-MPC is introduced in the development of a cost function, which provides stiff voltage regulation. Resonance damping and sampling noise resistance can also be achieved with the proposed cost function. An adaptive step is introduced to enable a fast transition. Assessments on the performance of the proposed MDCS-MPC are conducted. Comparisons with other control methods are also provided. Experimental validations on a 300 V/300 V 20-kHz 1-kW dual-active-bridge converter are carried out to verify the theoretical claims. © 1986-2012 IEEE.