Control method based on backup power system of fuel cell

Abstract

The invention discloses a control method based on a backup power system of a fuel cell, which comprises the following steps that: 1) the state of an external power supply is judged through detecting two parameters of the backup power system, i.e. battery current and bus voltage; 2) when the external power supply is detected to be power-off, the battery pack in the backup power system powers up external electric equipment, the fuel cell system in the backup power system is promptly prepared to be started, and the time to start the fuel cell system is determined according to the magnitude of the discharge current of the battery; and 3) when the fuel cell system is needed, the power output to the external electric equipment is controlled through regulating the rotating speed of the fan in the fuel cell system. Therefore, each functional module of the backup power system with the fuel cell system as the core can organically and efficiently operate, thereby improving the efficiency.

Description

technical field [0001] The invention relates to a control method based on a fuel cell backup power supply system. Background technique [0002] With the global energy shortage, environmental pollution and other issues becoming more and more prominent, the research and development of new energy has become the consensus of all countries, and fuel cell technology based on hydrogen energy has been developed rapidly. At present, domestic communication base stations and other fields are still The lead-acid battery is used as the main energy supply for the backup power supply. Due to the limited power supply time of the lead-acid battery, it is easy to pollute the environment and other deficiencies, it is very necessary to provide a new alternative energy source, and one of the more generally accepted solutions is to use fuel-based Backup power system of battery technology. However, domestic fuel cell backup power system is still in the research and development stage, and there are...

AI Technical Summary

Problems solved by technology

[0002] With the global energy shortage, environmental pollution and other issues becoming more and more prominent, the research and development of new energy has become the consensus of all countries, and fuel cell technology based on hydrogen energy has been developed rapidly. At present, domestic communication base stations and other fields are still The lead-acid battery is used as the main energy supply for the backup power supply. Due to the limited power supply time of the lead-acid battery, it is easy to pollute the environment and other deficiencies, it is very necessary to provide a new alternative energy source, and one of the more generally accepted solutions is to use fuel-based Backup power system of battery technology. However, domestic fuel cell backup power system is still in the research and development stage, and there are no mature application cases and control methods.

[0003] In 200910061032.1, a communication fuel cell backup power system was proposed, which directly judges the power state of the mains by monitoring the voltage and current of the external mains, so different monitoring equipment needs to be installed for different electrical equipment. Insufficient versatility; when it detects an external power failure, it will immediately start the fuel cell, and when the external mains power fails for a short time or frequently starts and stops, the system will also take corresponding actions accordingly, which is not an effective control method ; and it does not provide a good control strategy for the system to match the external power demand

Images