Multi-stack distributed control method based on fuel cell health degree correction

Abstract

The invention discloses a multi-stack distributed control method based on fuel cell health degree correction, and the method comprises the steps: collecting voltage and current signals of an output end of a fuel cell, collecting voltage and current signals of an output end of a unidirectional converter, and collecting voltage and current signals of a demand side; evaluating the real-time operation performance of the fuel cell through the obtained voltage, current and power of the output end of the fuel cell, and quantifying the health degree of each fuel cell; calculating a real-time self-tuning factor related to the current performance state of each fuel cell according to the health degree calculation result of the fuel cells and by combining the circuit and current-carrying characteristics of the direct-current power supply network; and finally, completing the self-adaptive adjustment of the output power of the fuel cells through the rapid correction of a voltage outer loop and a current inner loop under the change of a real-time self-tuning factor, and achieving the distributed control of multiple stacks of fuel cells. According to the invention, any electric pile can access the system or the fault electric pile can exit the system, the communication fault is reduced, the system stability is enhanced, and the system capacity expansion is facilitated.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a power distribution management and control method of fuel cell clusters. Background technique [0002] With the rapid development of science and technology in the world, energy sources that pollute the environment urgently need new environmentally friendly energy alternatives. Energy conservation and emission reduction have become the direction of continuous efforts of scientific research institutes in various countries. Among many new energy applications, hydrogen energy is an efficient, safe , clean and sustainable new energy is regarded as the most promising clean energy and the development direction of human strategic energy in the 21st century, and a fuel cell is a device that converts hydrogen energy into electrical energy through an electrochemical reaction. Limited by the Carnot cycle, it has the advantages of high energy conversion efficiency, low operating temperatu...

AI Technical Summary

Problems solved by technology

However, most of the multi-stack fuel cell systems currently studied are composed of single-stack fuel cells with the same power generation parameters, and the coordinated control method among multi-stacks has not been studied in depth.

In addition, most of the existing control strategies are based on ideal conditions, and the fuel cell is regarded as a static power generation system. It is assumed that the operating performance of the stack does not change, and the impact of changes in its operating performance is not considered.

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