Wind turbine generators (WTG) are expected to provide active power control (APC) to track active power instructions from the power grid or wind farm operators. Because the regulation of turbines’ mechanical dynamics strongly depends on pitch angle regulation, mitigating frequent pitch adjustments is a key issue, and accordingly, several rotor speed variation-first APC methods have been proposed to decrease pitch servo fatigue. However, due to the lack of a quantitative description on the utilization of rotor speed variation (RSV), the ability of reducing pitch action through RSV can hardly be analyzed and compared among the existing APC methods. Hence, the disturbance range of nonpitch regulation (DRNP) and the maximum DRNP are defined in this paper. The former represents the effect of pitch action mitigation through RSV with a specific APC strategy and provides a unified foundation for quantitatively evaluating and selecting APC methods from the perspective of pitch servo serviceability. The latter, which depends on the turbine specifications and is independent of the control method, represents the maximum effect that can be achieved for a WTG. On this basis, an improved APC method is proposed to further reduce pitch servo fatigue. Finally, the DRNP indicators and the effectiveness and feasibility of the proposed method are verified by the wind turbine simulator-based experiments.

中文翻译：

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基于无变桨最大扰动范围的风力发电机有功功率控制

风力涡轮发电机 (WTG) 有望提供有功功率控制 (APC) 以跟踪来自电网或风电场运营商的有功功率指令。由于涡轮机机械动力学的调节强烈依赖于桨距角调节，因此减少频繁的桨距调节是一个关键问题，因此，已经提出了几种转子速度变化优先的 APC 方法来减少桨距伺服疲劳。然而，由于缺乏对转子速度变化（RSV）利用的定量描述，现有的APC方法很难分析和比较通过RSV降低桨距作用的能力。因此，本文定义了非俯仰调节（DRNP）的扰动范围和最大DRNP。前者代表了通过具有特定 APC 策略的 RSV 减轻俯仰动作的效果，并为从俯仰伺服适用性的角度定量评估和选择 APC 方法提供了统一的基础。后者取决于涡轮机规格并且与控制方法无关，代表了风力发电机组可以实现的最大效果。在此基础上，提出了一种改进的APC方法，以进一步降低俯仰伺服疲劳。最后，通过基于风力涡轮机模拟器的实验验证了 DRNP 指标以及所提出方法的有效性和可行性。它取决于涡轮机规格并且与控制方法无关，代表了风力发电机组可以实现的最大效果。在此基础上，提出了一种改进的APC方法，以进一步降低俯仰伺服疲劳。最后，通过基于风力涡轮机模拟器的实验验证了 DRNP 指标以及所提出方法的有效性和可行性。它取决于涡轮机规格并且与控制方法无关，代表了风力发电机组可以实现的最大效果。在此基础上，提出了一种改进的APC方法，以进一步降低俯仰伺服疲劳。最后，通过基于风力涡轮机模拟器的实验验证了 DRNP 指标以及所提出方法的有效性和可行性。