Decoupling control method and system of fuel cell air system

Abstract

The invention relates to a decoupling control method and system of a fuel cell air system. The method comprises the following steps of recognizing and calculating air parameters, and generating a gaincoefficient and a time coefficient of a decoupling control matrix, wherein the air parameters are an input variable and an output variable obtained through a test; generating an input and output parameter model in an air parameter control loop according to the autoregressive moving average model with the control quantity; substituting the gain coefficient and the time coefficient of the decoupling control matrix into the input and output parameter model in the air parameter control loop to generate a system transfer function relation matrix; and decoupling the system transfer function relationship matrix to generate a decoupling control matrix, and designing a decoupling controller according to the decoupling control matrix. The invention provides the method capable of relatively independently controlling parameters with strong coupling in the fuel cell air system, namely the decoupling control, so that the real-time online operation is realized, and the stable operation of the wholesystem is facilitated.

Description

technical field [0001] The invention relates to the field of decoupling control, in particular to a decoupling control method and system for a fuel cell air system. Background technique [0002] With the marketization of fuel cells, many fuel cell applications such as fuel cell vehicles, fuel cell power supplies, and fuel cell small and medium-sized power stations have emerged. Under the background that the environment and energy have become global common concerns, fuel cell vehicles are an important development direction of future energy technology. The proton exchange membrane fuel cell has the advantages of high energy conversion rate, fast start-up, long life, high specific power and specific energy, etc. Its reaction consumes hydrogen and oxygen, only produces water and heat, and does not pollute the natural environment. The world's major automobile manufacturers and R & D institutions believe that fuel cell vehicles with high efficiency and zero emissions will have br...

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Problems solved by technology

[0004] The present invention provides a decoupling control method and system of a fuel cell air system, which solves the problem that the air parameters of the fuel cell system are strongly coupled, time-varying, and nonlinear variables, and the air pressure and air flow rate of the fuel electric system during operation Interrelationships and mutual influences make the system control process very complicated

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