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首页> 外文会议>IEEE International Conference on Environment and Electrical Engineering;IEEE Industrial and Commercial Power Systems Europe >Small-Signal Stability Analysis of DFIG-based Wind Turbines Equipped with Auxiliary Control Systems under Variable Wind Speed
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Small-Signal Stability Analysis of DFIG-based Wind Turbines Equipped with Auxiliary Control Systems under Variable Wind Speed

机译：风速可变时基于DFIG的辅助控制系统风力发电机的小信号稳定性分析

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摘要

Providing ancillary services such as frequency support and power operating reserve by doubly fed induction gener-ator-based wind turbines has received considerable attention in the recent years, and several auxiliary controllers have been proposed to provide these services. In this paper, small-signal stability of wind turbines equipped with these controllers is assessed in presence of a frequency event and varying wind speed conditions. For this purpose, first, several auxiliary controllers are discussed, and a unified auxiliary controller (UAC) is proposed, which can represent all of these controllers simultaneously. Then, the overall transfer function from the wind speed to the wind turbine rotor speed considering the proposed UAC is derived. Moreover, by neglecting the power grid effects, an approximated first-order transfer function is also obtained. Exhaustive simulations examine the system stability with UAC, under both computer-generated and real wind speed profiles. In addition, simulation results confirm validity of the obtained detailed transfer function and the accuracy of its approximated version for several auxiliary controllers, by selecting appropriate UAC parameters.
机译：近年来，通过基于双馈感应发电机的风力涡轮机提供诸如频率支持和电力运行储备之类的辅助服务受到了广泛的关注，并且已经提出了几种辅助控制器来提供这些服务。在本文中，在存在频率事件和变化的风速条件的情况下，对配备有这些控制器的风力发电机的小信号稳定性进行了评估。为此，首先讨论几个辅助控制器，并提出一个统一的辅助控制器（UAC），它可以同时表示所有这些控制器。然后，推导了考虑拟议的UAC的从风速到风力涡轮机转子速度的整体传递函数。此外，通过忽略电网效应，还可以获得近似的一阶传递函数。详尽的仿真在计算机生成的和实际的风速剖面下均使用UAC检验了系统的稳定性。此外，仿真结果通过选择合适的UAC参数，确认了所获得的详细传递函数的有效性及其对于多个辅助控制器的近似版本的准确性。

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