A Kind of Busbar Voltage Control Strategy of Low-Voltage Direct Current
Power Distribution Network Based on Hybrid Energy Storage
YANG Li-xing, YAN Xiao-jie, ZHOU Yu
(School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China)
Abstract: The super capacitor and battery hybrid energy storage system has the characteristics of high energy density and high power density, which is suitable to stabilize the voltage fluctuation of low-voltage direct current (LVDC) distribution network containing a large number of distributed energy. This paper presented a new bus voltage division control strategy based on hybrid energy storage to implement 5-level voltage control for bus voltage, using the battery to stabilize the smaller bus voltage and using super capacitor to stabilize power balance of the bigger voltage fluctuation, and presenting a scheme to configure the super capacitor capacity based on the extreme conditions of the bus voltage fluctuation. Finally, feasibility of the strategy is verified through the simulation based on Simulink in Matlab. Key words: low voltage direct current distribution network; hybrid energy storage; bus voltage; super capacitor
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