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Modeling and impact of gear train backlash on performance of DFIG wind turbine system

机译：齿轮系间隙对DFIG风力发电机系统性能的建模及其影响

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摘要

In this paper, the performance of a grid connected doubly fed induction generator based wind turbine (DFIG-WT) system is examined, in the presence ofbacklashin its gear-train. A detailed model of the backlash in its gear-train which couples the wind turbine to the DFIG, has been derived based on a two-mass drive-train model. The DFIG is equipped with the control for maximum power point tracking, terminal voltage, DC-link voltage and rotor reactive power minimization. In order to investigate the system dynamics, the modes of oscillations of the system with backlash have been characterized using a small-signal stability model. It has been found that the backlash has a pronounced impact on the system behaviour when subjected to a large wind disturbance, a fact that may have been overlooked in conventional controller design philosophies. It has also been observed that an electrical disturbance such as a voltage-sag at the point-of-common-coupling during varying winds may further deteriorate the available damping of the electro-mechanical oscillations, due to the backlash. The overall system performance has been investigated with the time-varying wind modelled by theVan der Hoven’sspectral model with added turbulence using Kaimal spectrum.
机译：在本文中，在齿轮系中存在反冲的情况下，研究了并网双馈感应发电机风力发电机（DFIG-WT）系统的性能。基于两质量传动系统模型，推导了其齿轮系中的反冲的详细模型，该齿轮系将风力涡轮机耦合到DFIG。 DFIG配备了用于最大功率点跟踪，端子电压，直流母线电压和转子无功功率最小化的控件。为了研究系统动力学，已使用小信号稳定性模型对带有反冲的系统的振荡模式进行了表征。已经发现，当受到大的风扰时，齿隙对系统的性能有显着的影响，这一事实在传统的控制器设计哲学中可能已经被忽略了。还已经观察到，由于间隙的影响，诸如在变化的风期间在公共耦合点处的电压骤降之类的电干扰会进一步恶化机电振荡的可用阻尼。使用Van der Hoven光谱模型模拟时变风，并使用Kaimal谱增加了湍流，从而研究了整个系统的性能。

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