Analysis and Damping of Mechanical Resonance of Wind Power Generators Contributing to Frequency Regulation
Analysis and Damping of Mechanical Resonance of Wind Power Generators Contributing to Frequency Regulation
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DOI：
10.1109/tpwrs.2016.2618391
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发表时间：
2017-07
影响因子：
6.6
通讯作者：
M. Arani;Y. Mohamed
中科院分区：
文献类型：
--
作者：
M. Arani;Y. Mohamed
风力发电机在现代电力系统中将变得越来越有用;因此，它们应该能够以类似于传统发电机的方式支持系统频率。下垂和虚拟惯性是文献中报道最多的方法。然而，它们对发电机和系统频率稳定性的影响，当双质量机械动力学的风力发电机被认为是，还没有得到彻底解决。在本文中，小信号建模，分析和特征值的研究表明，将风力发电机的频率调节可以暴露其轴的力量刺激其自然共振频率动态，并导致不稳定。本文表明，必须研究和加强调频风力发电机的机械谐振，而不是单独的，而是作为整个电力系统稳定性分析的一部分。为了克服在风力发电机中实施频率调节所引起的稳定性问题，本文研究了不同的替代方案，以稳定发电机动态，同时，最大限度地减少传统风力发电机控制器中的不良干扰。时域仿真结果验证了分析结果和讨论。
Wind power generators will become increasingly useful in modern power systems; therefore, they should be able to support the system frequency in a way similar to that of conventional generators. Droop and virtual inertia are the most reported methods in the literature. However, their impact on the generator and system frequency stability, when the double-mass mechanical dynamics of a wind power generator are considered, has not been addressed thoroughly. In this paper, small-signal modeling, analysis, and eigenvalues studies are used to show that incorporating a wind power generator in the frequency regulation can expose its shaft to forces stimulating its natural resonance frequency dynamics and lead to instability. This paper shows that the mechanical resonance of frequency-regulating wind generators must be studied and enhanced not individually but as a part of the whole power system stability analyses. To overcome the stability problem caused by implementing frequency regulation in wind generators, this paper investigates different alternatives to stabilize the generator dynamics and, at the same time, minimize undesirable interference in the conventional wind power generator controllers. Time-domain simulation results validate the analytical results and discussions.