Large-scale integration of distributed new energy sources have resulted in complicated power distribution and prominent three-phase power imbalance of power networks owing to output stochasticity of new energy generations.Cur-rently prevailing domestic three-phase active unbalance control devices have hardware limited by the system,and cannot fundamentally solve the problem of heating and switching frequency.The newly developed silicon carbide wide band gap switches,are nevertheless advantegeous with withstand voltage and low loss,and can be effectively applied to the three-phase active unbalance control of distribution networks.Therefore a new three-phase power regulation device for distribu-tion network was studied in this paper.First a resonant gate drive circuit based on four auxiliary switches was proposed,and a new multilevel combined drive circuit was proposed to solve the crosstalk phenomenon of bridge arms.Then the mechanism of switching oscillation of SIC MOSFET was analyzed and the corresponding suppression methods were pro-posed.Finally a three-phase power regulation device for new distribution networks based on wide band gap devices was de-signed and the overall scheme,hardware circuit and software program were determine.The effectiveness of the design was verified by the test results of the experimental prototype of the power coordination controller developed based on the meth-od proposed in this paper.
three-phase power imbalancesilicon carbide devicewide band gap devicethree-phase power regulationnew distribution network
维普
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