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A Novel Dynamic Energy Model and Damping Evaluation Method of DFIG Grid-connected System
编号：105 访问权限：仅限参会人 更新：2022-05-24 08:33:23 浏览：210次 张贴报告

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摘要
Aiming at the uncertain mechanism of sub-synchronous oscillation caused by the connection of DFIG and series compensation equipment, this paper proposes a method for analyzing the damping characteristics of sub-synchronous oscillations based on dynamic energy model. Firstly, using the dynamic energy of the DFIG and series compensation, combined with the induction generator equation of the DFIG, the converter control equation and the series compensation equation, the dynamic energy function under the electromagnetic transient scale is constructed. On this basis, considering the actual measurement conditions, calculating the dynamic energy under  sub-synchronous frequency disturbance, obtaining the oscillation energy reflecting the interaction of the DFIG turbine and series compensation, and then construct the oscillation energy stability criterion for grid-connected system of the DFIG. Quantitative analysis of the energy interaction between the DFIG and series compensation by the oscillation energy reveals the influence mechanism of series compensation on the sub-synchronous oscillation. Finally, combined with the DFIG actual parameters, the above method is verified on the RT-LAB simulation platform. The results show that the dynamic energy can accurately reflect the influence of DFIG-Series compensation, which showing negative damping characteristics in the sub-synchronous oscillation.
 
关键词
DFIG; Sub-synchronous oscillation; Dynamic energy model; Damping characteristics
报告人
ZhaoDong
国网经济技术研究院有限公司

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重要日期

  • 会议日期

    05月27日

    2022

    至

    05月29日

    2022

  • 02月28日 2022

    初稿截稿日期

  • 05月29日 2022

    注册截止日期

  • 06月22日 2022

    报告提交截止日期

主办单位
IEEE Beijing Section
China Electrotechnical Society
Southeast University
协办单位
IEEE Industry Applications Society
IEEE Nanjing Section
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