School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
This work is supported by National Key R&D Program of China (No. 2018YFB1500700).
When the bi-directional Buck/Boost topology is used as energy storage ports of electric energy routers, the energy storage port exists grid-connection startup inrush current and the bus voltage has fluctuation in the off-grid mode. Aiming at the problem, an optimal grid-connection/off-grid control strategy is proposed for energy storage port, which combines voltage feedforward of energy storage port and load power feedforward control. The feedforward of voltage on the energy storage side can effectively restrain the inrush current of energy storage port during grid-connection startup process, and eliminate the impact of voltage fluctuation of energy storage side on bus voltage. The communication unit is fast controlled by electric energy router based on Ethernet control automation technology (EtherCAT) to feeds forward the load power, which can restrain bus voltage fluctuation caused by load disturbance in the off-grid mode and reduce the cost of current sampling. The theoretical analysis and experimental results show that the proposed method can effectively improve the performance of electric energy router.
ZHAO Wenguang,ZHANG Xing,LI Yanjun,et al.Optimal Control Strategy for Energy Storage Port of Electric Energy Router Based on Voltage and Power Feedforward[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190801002.