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Robust Tracking Control of a Three-Phase Charger under Unbalanced Grid Conditions

Author

Listed:
  • Chivon Choeung

    (Faculty of Electrical Engineering, National Polytechnic Institute of Cambodia, Phnom Penh 12409, Cambodia)

  • Meng Leang Kry

    (Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea)

  • Young Il Lee

    (Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea)

Abstract

This paper presents a robust control technique for three-phase chargers under unbalanced grid conditions. The control method consists of inner-loop robust grid-current control and outer-loop proportional integral control for constant current (CC) and constant voltage (CV) control. A dual-current control for the inner-loop positive and negative sequence is employed to eliminate the unbalanced current caused by the grid so that a constant current and voltage can be provided to the batteries. The inner-loop robust controllers utilize state feedback with integral action in the dq -synchronous frame. A linear matrix inequality-based optimization scheme is used to determine stabilizing gains of the controllers to maximize the convergence rate to steady state in the presence of uncertainties. The uncertainties of the system are described as the potential variation range of the inductance and resistance in the L -filter.

Suggested Citation

  • Chivon Choeung & Meng Leang Kry & Young Il Lee, 2018. "Robust Tracking Control of a Three-Phase Charger under Unbalanced Grid Conditions," Energies, MDPI, vol. 11(12), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3389-:d:187545
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    References listed on IDEAS

    as
    1. Hongwen He & Rui Xiong & Jinxin Fan, 2011. "Evaluation of Lithium-Ion Battery Equivalent Circuit Models for State of Charge Estimation by an Experimental Approach," Energies, MDPI, vol. 4(4), pages 1-17, March.
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    Cited by:

    1. Yunjun Yu & Zhongyang Wang & Xiaofeng Wan, 2019. "Optimal Current Balance Control of Three-Level Inverter under Grid Voltage Unbalance: An Adaptive Dynamic Programming Approach," Energies, MDPI, vol. 12(15), pages 1-20, July.

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