A multi-stack distributed control method based on fuel cell health correction

Abstract

The invention discloses a multi-stack distributed control method based on fuel cell health correction, which collects voltage and current signals at the output end of the fuel cell, collects voltage and current signals at the output end of a unidirectional converter, and collects voltage and current signals at the demand side ;Evaluate the real-time operation performance of the fuel cell through the obtained fuel cell output voltage, current and power, and quantify the health of each fuel cell; according to the calculation results of the fuel cell health, combined with the circuit and current carrying characteristics of the DC power supply network Calculate the real-time self-tuning factor related to the current performance state of each fuel cell; finally, under the change of the real-time self-tuning factor, the self-adaptive adjustment of the output power of the fuel cell is completed through the rapid correction of the voltage outer loop and the current inner loop, and the realization of multi-stack fuel Distributed control among batteries. The invention is beneficial for any stack to be connected to the system or a faulty stack to be withdrawn from the system, reduces communication failures, enhances system stability, and facilitates system expansion.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a power distribution management and control method of a fuel cell cluster. Background technique [0002] With the rapid development of science and technology in the world, the energy that pollutes the environment urgently needs to be replaced by new environmentally friendly energy sources. Energy saving and emission reduction have become the direction of continuous efforts of scientific research institutes in various countries. In many new energy applications, hydrogen energy is an efficient and safe energy source. , 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, while the fuel cell is a device that converts hydrogen energy into electrical energy through electrochemical reaction. Restricted by the Carnot cycle, it has the advantages of high energy conversio...

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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