Accurate power distribution control method for ISOP-DC-SST

Abstract

The invention discloses a precise power distribution control method for ISOP-DC-SST, and belongs to the technical field of power electronics. The method comprises the following steps: acquiring a single-module control signal; designing a balance coefficient; designing a precise power distribution controller to obtain a final control signal; according to different control requirements, corresponding modulation strategies are adopted, and the final control signal is modulated into an inner phase shift angle and an outer phase shift angle, so that the switch-on and switch-off of a DAB converter switch tube are controlled, and the control of output voltage and power is realized. Based on an adaptive principle, a balance coefficient based on a Sigmoid function is introduced as an adjusting item to generate nonlinear negative feedback, and the output power of a single module is dynamically adjusted, so that the input voltage of the single module is stabilized to a balance point. Compared with the prior art, the precise power distribution controller can effectively balance the input voltage, and has higher robustness and less calculation amount.

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