A coordinated optimal control method for a multi-stack fuel cell power generation system

Abstract

The invention discloses a coordinated optimization control method of a multi-stack fuel cell power generation system, The topology of multi-stack fuel cell system is established, and then the efficiency of single-stack fuel cell system is calculated theoretically. By analyzing the relationship between the efficiency of single-stack fuel cell system and output power, the overall efficiency of multi-stack parallel fuel cell power generation system is analyzed, and the overall efficiency and load power constraint relationship of multi-stack fuel cell power generation system are established. In accordance with actual t data, The curve of efficiency versus output power is plotted, and the load power is distributed to each stack reasonably by the adaptive power distribution control method of multi-stack fuel cell system. The whole efficiency of the system is taken as the evaluation index to ensure the stable operation of multi-stack fuel cell system with the optimal efficiency.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a coordinated optimization control method for a multi-stack fuel cell power generation system. Background technique [0002] Today's energy problems are becoming more and more serious, and traditional fossil energy is gradually decreasing or even exhausted. As an important part of distributed power, fuel cells are widely favored for their advantages such as fast start-up speed, friendly reaction products, low operating temperature, and low noise. Fuel cell power generation system is widely used in distributed power generation, rail transit, motor vehicles and mobile equipment, and is an attractive power generation device. [0003] High-power transportation vehicles such as modern trams and EMUs have the advantages of safety, reliability, and environmental protection. They are widely used as transportation methods with medium and low volumes. It is a new breakthrough to apply f...

AI Technical Summary

Problems solved by technology

[0005] However, the traditional power distribution strategy and the average distribution strategy have low system efficiency in the low power range, and the cost of starting all the stack systems is high when the power is low. The minimum output power of this strategy is the sum of the minimum output power of all subsystems, that is, 4Pmin , which has obvious defects in the low power range; the step-by-step distribution strategy can achieve a wider power range output of the system, and can significantly improve the system efficiency at low power output, but only reaches the maximum efficiency at the first fuel cell unit, and then As the power level increases, the overall system efficiency drops dramatically

At present, there are relatively few researches on the multi-stack fuel cell power generation system at home and abroad, and its consistency, coordination and optimization control has not been effectively solved, and it is impossible to realize the efficient and stable operation of the multi-stack fuel cell power generation system.

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