Method for balancing parallel output voltage of power supplies and power supply device

Abstract

The invention provides a method for balancing the parallel output voltage of power supplies and a power supply device. The method comprises that S11) all power supplies in parallel connection are isolated from one another; S12) whether the output voltage needs to be adjusted is determined according to the present output voltages of all the power supplies in parallel connection, if YES, S13) is turned to, and if NO, S17) is turned to; S13) the power supply whose output voltage needs to be adjusted is set as an adjustment object; S14) the adjustment object implements power-constant output; S15) the output current of the adjustment object is increased according to a predetermined rule, so that the present output voltage of the adjustment object is reduced; S16) whether the output voltage needs to be adjusted is determined according to the present output voltages of all the power supplies in parallel connection again, if NO, parallel connection of all the power supplies is recovered and the S17) is carried out; and if YES, the S13) is returned to; and S17) output is carried out according to the present output voltage. The power supplies can be used by being connected in parallel directly, different power requirements of different occasions are met, and the stability of the power supply device is improved.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a method and a power supply device for equalizing the parallel output voltage of power supplies. Background technique [0002] In the traditional design of outdoor power supply, a constant-voltage power supply group is usually used to supply power to electrical equipment. In order to meet the power supply requirements of the load, the constant-voltage power supply group is usually composed of multiple constant-voltage power The service life and damage of each constant-voltage power supply in the piezoelectric power supply group are different, and the output voltage of each constant-voltage power supply is different, which cannot meet any power demand of the user; and the traditional constant-voltage power supply cannot be used directly due to the different output voltages. Parallel operation is easy to cause backflow and damage to the power supply with low output voltage; ...

AI Technical Summary

Problems solved by technology

[0002] In the traditional design of outdoor power supply, a constant voltage power supply group is usually used to supply power to electrical equipment. In order to meet the power supply requirements of the load, the constant voltage power supply group is usually composed of multiple constant voltage power supplies in series. The service life and damage of each constant-voltage power supply in the piezoelectric power supply group are different, and the output voltage of each constant-voltage power supply is different, which cannot meet any power demand of the user; and the traditional constant-voltage power supply cannot be used directly due to the different output voltages. Parallel operation is easy to cause backflow and damage to the power supply with low output voltage; or use a balance device to balance the output voltage of each power supply, but the number of power supplies that can be connected in parallel in this way is limited, and the balance device will bring additional costs lead to increased costs

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