The Control Modeling and Disturbance of the Hybrid DC Transformer
The hybrid DC transformer is a key device in the renewable energy DC collection and transmission system,yet its operational characteristics under grid disturbances remain unclear,posing potential risks to the stable operation of the system.Considering the multi-mode of the hybrid device topology,this paper presents the operating and control principles of a high-voltage,high-capacity hybrid DC transformer and establishes control models.Based on the established control models,the impact of control and current parameters on the frequency-domain characteristics of the hybrid DC transformer's impedance transfer function is analyzed.The disturbance operation characteristics of the proposed hybrid DC transformer are verified through simulations.The simulation results demonstrate that the developed control model can effectively describe the operational characteristics of the hybrid DC transformer under grid voltage disturbances,and the transformer can run stably under the disturbance of the power grid voltage.
high voltage and high capacity DC transformerhybrid transformercontrol modelingtransfer functiondisturbance analysis
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