With high levels of wind energy penetration, the frequency response of isolated power systems is more likely to be affected in the event of a sudden frequency disturbance or fluctuating wind conditions. In order to minimize excessive frequency deviations, several techniques and control strategies involving Variable Speed Wind Turbines (VSWTs) have been investigated in isolated power systems. In this paper, the main benefits and disadvantages of introducing VSWTs—both their inertial contribution and primary frequency regulation—in an exclusively renewable isolated power system have been analyzed. Special attention has been paid to the influence of the delays of control signals in the wind farm when VSWTs provide primary regulation as well as to the wind power reserve value which is needed. To achieve this objective, a methodology has been proposed and applied to a case study: El Hierro power system. A mathematical dynamic model of the isolated power system, including exclusively renewable technologies, has been described. Representative generation schedules and wind speed signals have been fixed according to the observed system. Finally, in order to obtain conclusions, realistic system events such as fluctuations in wind speed and the outage of the generation unit with the higher assigned power in the power system have been simulated.

中文翻译：

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具有高可再生性的隔离电力系统中变速风力涡轮机的一次和/或惯性频率控制的实现分析。案例研究：El Hierro电力系统

随着高水平的风能渗透，在突然的频率干扰或风况波动的情况下，隔离的电力系统的频率响应更可能受到影响。为了最小化过多的频率偏差，已经在隔离的电力系统中研究了涉及变速风力涡轮机（VSWT）的几种技术和控制策略。本文分析了在纯可再生隔离电力系统中引入VSWT的主要利弊（包括惯性贡献和主频率调节）。当VSWT提供主要调节功能时，已经特别注意了控制信号在风电场中的延迟的影响以及所需的风力储备值。为了达到这个目的，已经提出了一种方法论并将其应用于案例研究：El Hierro电力系统。已经描述了隔离动力系统的数学动态模型，包括专门的可再生技术。代表的发电计划和风速信号已根据观察到的系统确定。最后，为了得出结论，模拟了现实的系统事件，例如风速波动和电力系统中分配功率较高的发电单元的故障。