吕振华,李雅然,郑明忠,李强,胡英杰
LYU Zhenhua,LI Yaran,ZHENG Mingzhong,LI Qiang,HU Yingjie

• 1:江苏省电力试验研究院有限公司
• 2:国网江苏省电力有限公司电力科学研究院

摘要(Abstract)：

风机通过释放转子动能参与调频可有效保障高风电渗透率电力系统的频率稳定性，但风机转速恢复时，会引起系统频率二次跌落。为此，在对频率支撑和转速恢复两个阶段进行定性和定量分析基础上，提出一种基于指数函数渐近趋近特性的风机转速恢复策略。首先，在风机转速恢复阶段，按照指数函数的功率参考值进行转子转速恢复；在转速恢复之后，切换到最大功率点追踪方式，对风机的输出功率进行控制。其次，考虑不同约束条件对指数衰减系数进行参数整定。最后，仿真结果验证了所提策略可有效抑制频率二次跌落，同时保证风机转速恢复过程平稳。
Wind turbines can contribute to frequency regulation by releasing rotor kinetic energy, which is an effective way to ensure frequency stability in power systems with high wind power penetration. However, the rotor speed recovery process may cause a secondary frequency drop(SFD) in the system. To address this issue, a wind turbine speed recovery strategy based on the asymptotic characteristics of an exponential function is proposed, following both qualitative and quantitative analysis of the frequency support and speed recovery. First, during the recovery period, the rotor speed is restored according to the power reference value defined by an exponential function. After the speed is recovered, the control switches to maximum power point tracking(MPPT) to manage the turbine′s output power. Second, the parameters of the exponential decay coefficient are tuned based on various constraints. Finally, simulation results validate that the proposed strategy effectively mitigates SFDs while ensuring a smooth rotor speed recovery process.

关键词(KeyWords)： 双馈风机;二次跌落;惯量响应;一次调频;频率支撑;转子转速
doubly-fed wind turbine;SFD;inertia response;primary frequency regulation;frequency support;rotor speed

Abstract:

Keywords:

基金项目(Foundation): 基础研究计划自然科学基金—青年基金项目（BK20230167）

作者(Author): 吕振华,李雅然,郑明忠,李强,胡英杰
LYU Zhenhua,LI Yaran,ZHENG Mingzhong,LI Qiang,HU Yingjie

DOI: 10.19585/j.zjdl.202411004

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