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首页> 外文期刊>Energy Conversion, IEEE Transactions on >Small Signal Dynamics of DFIG-Based Wind Turbines During Riding Through Symmetrical Faults in Weak AC Grid
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Small Signal Dynamics of DFIG-Based Wind Turbines During Riding Through Symmetrical Faults in Weak AC Grid

机译：基于DFIG的风力发电机组在弱交流电网中穿越对称故障时的小信号动力学

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摘要

Instability issues of the grid-connected doubly fed induction generator (DFIG) based wind turbines (WTs) during low-voltage ride-through (LVRT) have got little attention yet. In this paper, the small-signal behavior of DFIG WTs attached to weak ac grid with high impedances during the period of LVRT is investigated, with special attention paid to the rotor-side converter. First, based on the studied LVRT strategy, the influence of the high-impedance grid is summarized as the interaction between phase-looked loop (PLL) and rotor current controller (RCC). As modal analysis result indicates that the underdamped poles are dominated by PLL, complex torque coefficient method, which is conventionally applied in power system to study the interaction between mechanical and electrical subsystems of synchronous generator, is generalized to analyze how the PLL-RCC interaction influence the phase motion of PLL. Then, the concerned small-signal stability of the PLL-synchronized DFIG system can be discerned by the developed complex phase coefficients. Impacts of PLL's and RCC's parameters are highlighted, as well as the system's operating conditions during LVRT. Finally, the analytical result is validated by experiments.
机译：基于电网连接的双馈感应发电机（DFIG）的风力涡轮机（WTs）在低压穿越（LVRT）期间的不稳定性问题尚未引起足够的重视。在本文中，研究了在LVRT期间连接到具有高阻抗的弱交流电网的DFIG WT的小信号行为，并特别注意了转子侧变流器。首先，在研究的LVRT策略的基础上，将高阻电网的影响归纳为相环（PLL）和转子电流控制器（RCC）之间的相互作用。模态分析结果表明欠阻尼极由PLL主导，一般采用复转矩系数法研究电力系统同步电机的机电子系统之间的相互作用，并分析了PLL-RCC的相互作用对系统的影响。 PLL的相位运动。然后，可以通过开发的复数相位系数来识别PLL同步DFIG系统所关心的小信号稳定性。突出显示了PLL和RCC参数的影响，以及LVRT期间系统的工作条件。最后，通过实验验证了分析结果。

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  • 来源
    《Energy Conversion, IEEE Transactions on》 |2017年第2期|720-730|共11页
  • 作者

    Jiabing Hu; Bo Wang; Weisheng Wang; Haiyan Tang; Yongning Chi; Qi Hu;

  • 作者单位

    State Key Laboratory of Advanced Electromagnetic Engineering and Technology and the School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China;

    State Key Laboratory of Advanced Electromagnetic Engineering and Technology and the School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China;

    China Electric Power Research Institute, Beijing, China;

    China Electric Power Research Institute, Beijing, China;

    China Electric Power Research Institute, Beijing, China;

    State Key Laboratory of Advanced Electromagnetic Engineering and Technology and the School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phase locked loops; Power system stability; Impedance; Rotors; Stability analysis; Circuit faults; Wind turbines;

    机译：锁相环;电力系统稳定性;阻抗;转子;稳定性分析;电路故障;风力发电机;

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