Research on control strategy of energy storage converter based on super capacitor |
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| Authors: | LI Ningning SHI Changli HE Junqiang ZHANG Guowei |
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| Affiliation: | 1 Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The mathematical model for the dual-stage converter topology is established. First, the influence of neutral-point voltage fluctuation of DC capacitor on the output of the converter is analyzed based on this model. Then the influence mechanism of unbalanced output current and harmonic current on DC capacitor neutral-point voltage is studied. Furthermore, the suppression control strategy of AC output voltage unbalance and zero-sequence harmonic under unbalanced and non-linear loads is proposed. Finally, a simulation model of MATLAB and a 80 kW experimental prototype are established to validate the control strategy theoretically. The simulation and experimental results proof the effectiveness of the control strategy. |
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| Keywords: | dual-stage converter neutral-point voltage unbalanced output current suppression control strategy |
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