Method for controlling and optimizing SOFC system oscillation caused by water vapor flow oscillation

Abstract

The invention relates to the technical field of water vapor external reforming solid oxide fuel cells, in particular to a method for controlling and optimizing SOFC system oscillation caused by water vapor flow oscillation. Comprising the following steps: modeling a steam external reforming SOFC system; the condition of water vapor flow oscillation is simulated and analyzed; introducing an oscillation control algorithm based on fuzzy control, and proposing a control and optimization strategy; and analyzing and applying an optimization effect according to a simulation experiment result. According to the design of the invention, the water vapor oscillation model is constructed, so that frequent discharge experiments on the SOFC system are not needed, and system faults are avoided; respectively designing a single / double input fuzzy controller, and controlling the temperature and voltage in the SOFC system within a reasonable range through simulation to realize control of system oscillation; a fuzzy control rule and a control strategy are designed, real-time tracking of a set value is achieved, oscillation is prevented from spreading in the SOFC system, and therefore the performance of the system is optimized.

Description

technical field [0001] The invention relates to the technical field of steam external reforming solid oxide fuel cells, in particular to a SOFC system oscillation control and optimization method caused by water vapor flow oscillation. Background technique [0002] When researching solid oxide fuel cells (SOFCs) with external steam reforming, the occurrence and propagation of oscillations during SOFC power generation are very common in SOFC systems. Severe oscillations can cause the system to malfunction and not work properly. Therefore, measures must be taken to eliminate or reduce the impact of oscillation on the SOFC system, so that the system can generate stable and normal power and maintain a healthy working state. The simplest and most appropriate way is to control and optimize the root cause of the oscillation after successfully locating the root cause of the system oscillation, so as to prevent the propagation of the oscillation in the system. [0003] In previous s...

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Problems solved by technology

[0004] Based on the SOFC independent power generation system in the existing research, frequent discharge experiments on the SOFC system may not only cause the SOFC system to malfunction and make the SOFC power generation system unable to work normally, but also directly oscillate on the system due to the long test period. control is inappropriate

However, there is no method to study and apply to control and optimize the SOFC system oscillation caused by the water vapor flow oscillation without damaging the SOFC power generation system.

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