基于自抗扰控制方法关于含SVG设备的直驱风机谐振策略研究

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Abstract： To address the oscilation 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 firstused 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.

Key words： direct-driven wind turbine; static var generator; sequence impedance modeling; linear active disturbance rejection control; resonance suppression

0引言

大规模可再生能源的并网导致我国新能源占比升高，电力系统呈现出高比例电力电子设备的特征，与以传统同步机为主构建的电力系统相比，新型电力系统存在惯性低、宽频带谐振高等缺陷[2.3]。（剩余12928字）