Control method of power supply system

Abstract

The invention relates to the field of power supply and provides a control method for a power supply system. The method includes: obtaining the detection result of the AC power failure detection unit as mains power failure, and obtaining the detection result of the AC power failure detection unit again after delaying for the first time is still mains power failure, then confirming the mains power failure; After confirming the mains power failure, if the indication result of the mains power failure flag is that the mains power is normal, the control switch device is closed, the fuel cell is controlled to be turned on, and the indication result of the mains power failure flag is adjusted to be mains power failure. The battery supplies power to the load; if the indication result of the mains power failure flag is that the mains power is lost and it is obtained that the fuel cell is turned on, the power is supplied by the fuel cell. The invention is beneficial to avoid the accidental start and stop of the fuel cell and the storage battery, and to improve the service life of the storage battery and the fuel cell; and it does not frequently issue repeated start instructions to the fuel cell, which is beneficial to avoiding the execution disorder of the control program.

Description

technical field [0001] The invention relates to the field of power supply, in particular to a control method for a power supply system. Background technique [0002] Some existing power consumption occasions require continuous power supply, such as communication base stations. [0003] In order to ensure the power demand of this kind of power consumption occasions, the Chinese invention patent application with the publication number CN101505092SA discloses a fuel cell backup power supply system for communication. The fuel cell is used as a backup power supply to power the communication system after the mains power failure. [0004] Moreover, due to the long start-up time of the fuel cell, it is easy to cause the fuel cell to fail to supply power to the load in time after the mains power failure. In order to solve this problem, the Chinese utility model patent with publication number CN202798118U discloses a fuel cell emergency The seamless switching system of the power sup...

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Problems solved by technology

[0004] Moreover, due to the long start-up time of the fuel cell, it is easy to cause the fuel cell to fail to supply power to the load in time after the mains power failure. In order to solve this problem, the Chinese utility model patent with publication number CN202798118U discloses a fuel cell emergency The seamless switching system of the power supply, the scheme first adopts the battery power supply after the mains power failure, and switches to the fuel cell power supply after the fuel cell is turned on

[0005] However, the detection accuracy of the existing technology for mains power failure is relatively poor, which leads to false start and stop of the fuel cell, which affects the service life of the fuel cell and battery; Duplicate the opening command of the fuel cell before it is fully opened, causing the control program to be disordered

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