Research on the Improved Droop Control Strategy for Improving the Dynamic Characteristics of DC Microgrid
Zhi Na1, Zhang Hui1 ,Xiao Xi2
1.Faculty of Automation and Information Engineering Xi’an University of Technology Xi’an 710048 China 2.State Key Lab of Power Systems Tsinghua University Beijing 100084 China
Abstract In this paper,the influence of the power turbulence on the output voltage is theoretically analyzed.An improved droop control strategy based on the resistive virtual impedance and compensative virtual impedance is presented.The resistive virtual impedance achieves the power sharing and the compensative virtual impedance improves the dynamic characteristics of the DC microgrid.A small signal model of a simple DC microgrid is used to analyze the design process of the compensative virtual impedance parameters.Simulation and experimental results demonstrate that the proposed compensative virtual impedance can improve the dynamic characteristics of the DC microgrid and enhance the damping property.
Zhi Na,Zhang Hui,Xiao Xi. Research on the Improved Droop Control Strategy for Improving the Dynamic Characteristics of DC Microgrid[J]. Transactions of China Electrotechnical Society, 2016, 31(3): 31-39.
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2016, Vol. 31 
