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AssigneeShandong University
InventorsAlian CHEN, Wei WANG, Tong LIU, Shijie CHENG
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A method for controlling a hybrid modular direct current transformer (HMDCT) based on load-current feedforward featuring fast dynamic response, may include: acquiring corresponding measured voltage and current values of the HMDCT according to a selected control mode; inputting a difference between the measured voltage value and its reference value to a PI controller to obtain an error compensation component; constructing a transfer function of the load-current feedforward path in real time; constructing an improved feedforward control strategy based on the measured current value, the error compensation component, and the transfer function of the load-current feedforward path, and calculating a reference value of the PS-DAB output current in real time; and calculating an optimal phase-shift ratio of the PS-DAB according to the reference value of the output current of the PS-DAB, and generating modulated PWM signals to control the HMDCT in the selected mode.
A method for controlling a hybrid modular direct current transformer (HMDCT) based on load-current feedforward, responding to a change in a load current for the HMDCT comprising at least one phase-shift dual active bridge (PS-DAB) and one series resonant dual active bridge (SR-DAB), wherein specific steps of the method are as follows:
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