High-voltage Large-capacity Battery Energy Storage System Connecting to 35kV Grid Without Transformer
The design method of main circuit parameters,related control parameters and control strategy are systemati-cally studied in order to promote practical application of 35 kV high-voltage large-capacity battery energy storage system(BESS).A simulation model of the 35 kV/10 MW/10 MWh system is built in MATLAB/Simulink to verify the correct-ness of the proposed design method and control strategy.The research results show that the 35 kV high-voltage BESS has large unit capacity and fast power response and can implement active state-of-charge balance and fault redundancy con-trol of internal battery clusters.Its system efficiency and reliability are higher,which can adapt to the large-scale development of renewable energy in the future.
battery energy storage systemlarge unit capacitytransformerless high-voltage energy storage converterparameters designcontrol strategystate of charge balance
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