【摘要】 为解决基于自抗扰控制的含静止无功发生器直驱风机与电网交互可能会引发系统振荡进这一问题，首先采用奈奎斯特稳定性判据分析了其控制参数以及电网强度对并网系统稳定性的影响；然后采用低通滤波器和改进线性自抗扰控制重塑系统阻抗以增强阻尼。与常用抑制措施对比，该策略能够有效避免由常用措施引发的负阻尼转移现象。MATLAB/Simulink仿真平台的实验结果验证了阻抗分析法的准确性以及所提抑制措施的有效性。更多还原

【Abstract】 To address the oscillation problem caused by the interaction between the direct-driven wind turbine with static var generator(SVG) based on active disturbance rejection control and the power grid may cause the system to oscillate, the Nyquist stability criterion is first used to analyze the influence of its control parameters and power grid strength on the stability of the grid-connected system. Subsequently, an impedance reshaping strategy, which incorporates a low-pass filter and an improved linear active disturbance rejection control, is proposed to enhance system damping. Compared with the conventional suppression measures, this strategy can effectively avoid the negative damping transfer phenomenon that commonly occurs. Simulation results obtained from the MATLAB/Simulink platform verify the accuracy of the impedance analysis and the effectiveness of the proposed suppression measures.更多还原