Frequency regulation at a wind farm using time-varying inertia and droop controls
Frequency regulation at a wind farm using time-varying inertia and droop controls
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DOI：
10.1109/icps.2018.8369978
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Yuan-Kang Wu;Wu-Han Yang;Yi-Liang Hu;Dung Phan Quoc
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文献类型：
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作者：
Yuan-Kang Wu;Wu-Han Yang;Yi-Liang Hu;Dung Phan Quoc
随着可再生能源发电变得越来越普遍，频率稳定性问题已成为输电系统运营商（TSO）特别关注的问题，特别是那些小功率输电系统。传统的风力发电系统不提供频率调节，因为它们与电网解耦。因此，随着风力发电机取代传统的火力发电机，风力发电系统的频率调节问题变得越来越重要。为了释放存储在旋转质量中的动能，可以将惯性和下垂控制回路添加到风力涡轮机（WT）的控制器中。本文提出了一种具有两个控制回路时变增益的先进控制策略。在所提出的策略中，增益是根据所需的频率响应时间来确定的。此外，控制回路的初始增益基于风速确定，考虑风电场（WF）中每个WT的操作条件。通过实际系统验证了该方法的有效性，表明该方法可用于改善电网频率调节。
As renewable power generation becomes more prevalent, the problem of frequency stability has become a particular concern of transmission system operators (TSOs), especially those of small power transmission systems. Traditional wind generation systems do not provide frequency regulation because they are decoupled from the power grid. Therefore, as conventional thermal generators are replaced by wind generators, the issue of frequency regulation for wind generation systems has become increasingly important. To release the kinetic energy stored in the rotating mass, inertia and droop control loops can be added into the controller of a wind turbine (WT). This work proposes an advanced control strategy with the time-varying gains of two control loops. In the proposed strategy, the gains are determined based on the desired frequency-response time. Moreover, the initial gain of the control loop is determined based on the wind speed, considering the operating condition of each WT in a wind farm (WF). The effectiveness of the proposed method is verified using an actual power system, revealing that it can be used to improve frequency regulation in a power grid.