Direct-current power supply system important load voltage loss compensation method based on finite time

Abstract

The invention discloses a direct-current power supply system important load voltage loss compensation method based on finite time, and belongs to the field of direct-current power supply systems. The method comprises the following steps: designing a DC power supply system important load voltage loss compensation device with double-path power supply input and single-path power supply output; establishing a state space model according to the relation between the important load branch voltage and the standby loop power supply output voltage of an actual system; defining an error variable according to the important load voltage setting value and the state space model; defining a Lyapunov function by using the error variable; for the Lyapunov function, solving a first-order derivative for time on an established state space model trajectory; an intermediate variable and a standby loop power supply output voltage are designed based on a finite time convergence theory, so that an important load voltage is quickly recovered to be close to a setting value. The device has the advantages that when a common loop loses voltage, the device is automatically switched to standby power supply input, isolated output is achieved through the DC / DC module, and output voltage and important load voltage are rapidly recovered to be close to a setting value.

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