电动汽车直流充电站的低阶RLC阻抗电路模型  

Reduced RLC Impedance Circuit Model of Electric Vehicle DC Charging Station

作　　者：林刚 戴宁怡[2] LIN Gang;DAI Ningyi(Zhuhai UM Science&Technology Research Institute(University of Macao),Zhuhai 519031,Guangdong,China;State Key Laboratory of Internet of Things for Smart City,University of Macao,Macao 999000,China)

机构地区：[1]珠海澳门大学科技研究院智慧城市研发中心,广东珠海519031 [2]澳门大学智慧城市物联网国家重点实验室,中国澳门特别行政区999000

出　　处：《南方能源建设》2023年第5期80-86,共7页Southern Energy Construction

基　　金：国家重点研发计划“战略性科技创新合作”重点专项“面向智慧城市的紧凑高效环保型配网柔性化关键技术研究及装备研发”(2022YFE0205100)。

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。[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.

关 键 词：电动汽车 直流充电站 多时间尺度交互 低阶阻抗电路模型 低频振荡机理分析 

分 类 号：TM7[电气工程—电力系统及自动化] TM910.6