This paper deals with the computation of all proportional-integral (PI)-based pitch controllers which achieve the desired frequency-domain specifications, namely, gain and phase margins (GPMs) of a large wind turbine (LWT) with communication delays. An efficient graphical method based on extracting the boundaries of stability regions in PI controller parameter space having user-defined GPMs has been employed to determine GPM-based stability regions for a wide range of time delays. The theoretical region boundaries are validated by using a powerful numerical method known as the quasi-polynomial mapping-based root finder (QPmR) and time-domain simulations. Results indicate that the proposed scheme gives an improved dynamic response compared to the recently developed scheme based on stability only for the pitch control of LWTs with communication delays.

中文翻译：

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大型风力涡轮机基于 PI 的稳健变桨控制器参数的计算

本文涉及所有基于比例积分 (PI) 的桨距控制器的计算，这些控制器可实现所需的频域规格，即具有通信延迟的大型风力涡轮机 (LWT) 的增益和相位裕度 (GPM)。一种基于提取具有用户定义 GPM 的 PI 控制器参数空间中稳定区域边界的有效图形方法已被用于确定大范围时间延迟的基于 GPM 的稳定区域。理论区域边界通过使用称为基于准多项式映射的根查找器 (QPmR) 和时域模拟的强大数值方法进行验证。