【摘要】 [目的]虚拟惯性阻尼控制（Virtual Inertia and Damping Control,VIDC）潜在的正反馈可能加剧控制环路内部的相互作用进而引起母线电压低频振荡，破坏电动汽车直流充电站（Electric Vehicle DC Charging Station, EVCS）的稳定性。虽然已有多时间尺度阻抗模型解释VIDC的稳定机制和VIDC控制下EVCS的低频振荡机理，但其本质上是一个高阶传递函数，获取阻尼控制策略的解析表达式。[方法]针对这一问题，文章对环路虚拟阻抗进行了详细的阻抗分析，直观地揭示了每个控制环路阻抗高阶属性的根本原因。[结果]通过伯德图近似提出了控制环路闭环增益的降阶拟合方法，建立了低阶阻抗电路模型。[结论]通过Matlab/Simulation仿真结果验证了所提出的多时间尺度低阶阻抗电路模型的有效性。更多还原

【Abstract】 [Introduction] The potential positive feedback of virtual inertia and damping control(VIDC) may exacerbate the interaction within the control loop, causing low-frequency oscillation of bus voltage and disrupting the stability of electric vehicle DC charging station(EVCS). Although the existing multi-timescale impedance model explains the stability mechanism of VIDC and the lowfrequency oscillation mechanism of VIDC-controlled-EVCS, it is essentially a high-order transfer function, making it difficult to obtain analytical expressions for damping control strategies. [Method] Therefore, a detailed impedance analysis of the virtual impedance of the loop was conducted to intuitively reveal the fundamental reasons for the higher-order properties of each loop impedance. [Result] A closed-loop gain fitting method for the control loop was proposed through Bode diagram approximation, and a low-order impedance circuit model was established. [Conclusion] The effectiveness of the proposed multi-timescale impedance model is verified through Matlab/Simulation.更多还原