Journal of Electrical Engineering and Technology

  • 제11권6호
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  • Pages.1645-1655
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  • 2016
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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Modeling and Control Design of Dynamic Voltage Restorer in Microgrids Based on a Novel Composite Controller

  • Huang, Yonghong (School of Electrical and Information Engineering, Jiangsu University) ;
  • Xu, Junjun (School of Electrical and Information Engineering, Jiangsu University) ;
  • Sun, Yukun (School of Electrical and Information Engineering, Jiangsu University) ;
  • Huang, Yuxiang (School of Electrical and Information Engineering, Jiangsu University)
  • 투고 : 2015.10.05
  • 심사 : 2016.06.08
  • 발행 : 2016.11.01
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초록

A Dynamic Voltage Restorer (DVR) model is proposed to eliminate the short-term voltage disturbances that occur in the grid-connected mode, the switching between grid-connected mode and the stand-alone mode of a Microgrid. The proposed DVR structure is based on a conventional cascaded H-bridge multilevel inverter (MLI) topology; a novel composite control strategy is presented, which could ensure the compensation ability of voltage sag by the DVR. Moreover, the compensation to specified order of harmonic is added to implement effects that zero-steady error compensation to harmonic voltage in specified order of the presented control strategy; utilizing wind turbines-batteries units as DC energy storage components in the Microgrid, the operation cost of the DVR is reduced. When the Microgrid operates under stand-alone mode, the DVR can operate on microsource mode, which could ease the power supply from the main grid (distribution network) and consequently be favorable for energy saving and emission reduction. Simulation results validate the robustness and effective of the proposed DVR system.

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참고문헌

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