标题： 基于参数化功率曲线的降载风电机组频率支撑方案 显示英文标题

标题： Frequency support Scheme based on parametrized power curve for de-loaded Wind Turbine under various wind speed

摘要： 随着现代电力系统中风电渗透率的增加，风电机组被要求提供类似于传统机组的频率支持。然而，对于现有风电机组的频率调节方案而言，由于需要兼顾频率调节性能和风电机组的稳定运行，在设置辅助频率控制器的控制增益时面临困难，尤其是在风速变化的情况下。本文提出了一种适用于降载风电机组的新颖频率调节方案（FRS）。该方案通过修改参数化的功率与转子速度曲线（包括惯性功率与转子速度曲线以及下垂功率与转子速度曲线）来提供频率支持，而非依赖于辅助频率控制器。所提出的方案的优势在于它不含任何控制增益，并且通常适应不同的风速条件。此外，该方案可以在没有风速测量信息的情况下在整个风速范围内工作。对比仿真结果表明，该方案提高了系统的频率响应能力，同时确保了基于双馈感应发电机（DFIG）的变速风电机组在各种风况下的稳定运行。此外，即使在风速下降的情况下进行频率调节控制，该方案也能防止转子速度过度减速。 显示英文摘要

摘要： With increased wind power penetration in modern power systems, wind plants are required to provide frequency support similar to conventional plants. However, for the existing frequency regulation scheme of wind turbines, the control gains in the auxiliary frequency controller are difficult to set because of the compromise of the frequency regulation performance and the stable operation of wind turbines, especially when the wind speed remains variable. This paper proposes a novel frequency regulation scheme (FRS) for de-loaded wind turbines. Instead of an auxiliary frequency controller, frequency support is provided by modifying the parametrized power versus rotor speed curve, including the inertia power versus rotor speed curve and the droop power versus rotor speed curve. The advantage of the proposed scheme is that it does not contain any control gains and generally adapts to different wind speeds. Further, the proposed scheme can work for the whole section of wind speed without wind speed measurement information. The compared simulation results demonstrate the scheme improves the system frequency response while ensuring the stable operation of doubly-fed induction generators (DFIGs)-based variable-speed wind turbines (VSWTs) under various wind conditions. Furthermore, the scheme prevents rotor speed overdeceleration even when the wind speed decreases during frequency regulation control.