【摘要】 高比例风电接入背景下，风电参与调频对电力系统超低频振荡问题的影响机理有待深入分析。文章构建了反映风电参与系统调频过程动态特性的频率响应模型，基于单机模型建立风电调频后系统稳定性分析模型。解析推导了简化模型下的闭环稳定性判据并分析其影响因素。通过阻尼转矩法分析了风电调频对原动系统阻尼变化的作用机制。研究了不同风电频率调控策略下系统频率稳定的影响因素。结果表明，风电参与频率调控在一定程度上对电力系统超低频振荡现象进行了抑制，对保障电网的安全稳定运行具有重要意义。更多还原

【Abstract】 With a high proportion of wind power connected, the impact mechanism of wind power participating in frequency regulation on the ultra-low frequency oscillation problem needs to be analyzed. This paper constructs a frequency response model reflecting the dynamic characteristics of wind power participating in the frequency regulation. Based on the single-machine single-load system, the stability analysis model after wind power frequency regulation is established. The closed-loop stability criterion under the simplified model is analytically deduced and its influencing factors are analyzed. The damping torque method is used to analyze the mechanism of wind power frequency regulation on the damping change of the prime mover system. The factors affecting system frequency stability under different wind power frequency control strategies are studied. The results show that the participation of wind power in frequency regulation can restrain the ultra-low frequency oscillation of the power system to a certain extent, and is of great significance to ensure the safe and stable operation of the power grid.更多还原