Self-adaptive decoupling control method of fuel cell air supply system

A technology of air supply and decoupling control, applied in the direction of adaptive control, fuel cells, electrical components, etc., can solve the problems of limiting the dynamic performance of the system, weak disturbance suppression, etc., and achieve reduced stability margin requirements and excellent environmental adaptation Sexuality, the effect of reducing workload

Active Publication Date: 2021-06-29
绍兴学森能源科技有限公司
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Problems solved by technology

[0006] The decoupling objects of the above two documents are all physical processes from speed, opening to mass flow and pressure. In practical applications, the suppression of disturbances such as altitude and ambient temperature is not strong, which limits the dynamic performance of the system.

Method used

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  • Self-adaptive decoupling control method of fuel cell air supply system
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  • Self-adaptive decoupling control method of fuel cell air supply system

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Embodiment Construction

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0045] Such as figure 1 A fuel cell air supply system adaptive decoupling control method shown, the method includes the following steps,

[0046] 1) The nonlinear characteristics of the air supply system are obtained through system identification:

[0047]

[0048] Among them, d is the differential operator, Q ca is the air volume flow rate, r ca is the ratio of cathode to ambient pressure, N AC is the speed of the air compressor, α bpv is the opening of the back pressure valve. The system is characterized from the opening of the back pressure valve, the speed of the air compressor to the volumetric flow rate and pressure ratio. It has strong robustness and adaptability to working conditions, and greatly reduces the workload of system identi...

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Abstract

The invention discloses a self-adaptive decoupling control method of a fuel cell air supply system, which is used for realizing decoupling control of flow pressure of the fuel cell air supply system in different environments, and comprises the steps of expected signal preprocessing, PID feedback controller processing, decoupling controller processing, sensor signal processing and the like. The expected signal preprocessing is used for converting expected mass flow and pressure signals into volume flow and pressure ratio signals, and the PID feedback controller obtains values of control quantities of a flow control loop and a pressure control loop through volume flow errors and pressure ratio errors; the fuel cell cathode pressure is relatively independently adjusted through the decoupling controller, and the sensor signal processor is used for converting mass flow and pressure signals fed back by a fuel cell system into volume flow and pressure ratio signals. Compared with the prior art, the method has the advantages of being high in environmental adaptability, good in dynamic tracking performance, convenient in controller design and the like.

Description

technical field [0001] The invention relates to the technical field of fuel cell systems, in particular to an adaptive decoupling control method for a fuel cell air supply system. Background technique [0002] Hydrogen fuel cells use the electrochemical reaction of hydrogen and oxygen to generate electricity to provide power for vehicles. They have the characteristics of zero emissions, no pollution, and high energy utilization. They are the development direction of new energy vehicle power in the future. [0003] The electrochemical reaction of the fuel cell requires sufficient oxygen, so an air supply system is needed as an auxiliary. The air supply system generally includes air compressors, back pressure valves, intercoolers and other components, which have the characteristics of flow and pressure coupling. The coupling characteristics of the fuel cell air supply system are likely to cause problems such as overshoot and large fluctuations in the control process, which li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04H01M8/04746
CPCG05B13/042H01M8/04753Y02E60/50
Inventor 焦杰然张卫东张曙殷园陈立华
Owner 绍兴学森能源科技有限公司
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