摘要
双向AC/DC变换器的控制及直流输出阻抗是电动汽车充电桩并网运行及稳定性分析的关键。首先,提出含直流下垂环节的虚拟同步电机(VSM)控制策略,并利用上层功率指令实现双向AC/DC变换器直流电压的无差调节。然后,建立VSM功率控制环小信号模型,分析有功功率传输、有功功率指令与直流电压间的交互作用及影响。接着,建立双向AC/DC变换器在直流下垂VSM控制策略下的直流输出阻抗模型,详细分析阻尼系数、惯性系数、直流侧电容、传输功率、直流下垂系数等关键参数对直流输出阻抗的影响。最后,通过仿真及阻抗测量验证了所提直流下垂VSM控制策略的有效性和阻抗模型的正确性。
The control of bidirectional AC/DC converters and the DC output impedance are crucial for the grid connected operation and stability analysis of electric vehicle charging stations.First,the virtual synchronous motor(VSM)control strategy with DC droop link is proposed,and the upper-level power command is used to realize the non-differential regulation for DC voltage of the bidirectional AC/DC converter.Then,a small signal model of the VSM power loop is established to analyze the interaction and influence between active power transmission,active power command and DC voltage.Furthermore,the DC output impedance model of the bidirectional AC/DC converter controlled by the DC droop VSM is established,and the influence of key parameters such as damping and inertia coefficient,DC side capacitance,transmission power,and DC droop coefficient on the DC output impedance is further analyzed in detail.Finally,the simulation result and impedance measurement verify the effectiveness and correctness of DC droop VSM control strategy and the proposed impedance model.
作者
张颖
伏睿
唐林权
荣高升
申亚波
ZHANG Ying;FU Rui;TANG Linquan;RONG Gaosheng;SHEN Yabo(State Grid Xingjiang Electric Power Supply Company,Urumqi 830011,China;Ecomic and Technical Research Institute,State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830011,China)
出处
《电器与能效管理技术》
2024年第4期74-81,89,共9页
Electrical & Energy Management Technology
基金
国网新疆电力有限公司科技项目(SGXJJJ00JSJS2310042)。
