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A double-layer predictive control method for a full-power fuel cell air compressor

A technology of fuel cell and predictive control, which is applied in the direction of fuel cell, computer control, program control, etc. It can solve the problems of power increase and fuel cell net power decrease, and achieve the effects of high accuracy, fast response speed and simple design

Active Publication Date: 2021-08-31
FUZHOU UNIV
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Problems solved by technology

When the air compressor supplies too much air, although the fuel cell can fully respond, the power consumed by the air compressor will increase accordingly. Since the power consumption of the air compressor accounts for about 80% of the auxiliary power consumption of the fuel cell, it will eventually lead to The net power reduction of the battery as a whole

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  • A double-layer predictive control method for a full-power fuel cell air compressor
  • A double-layer predictive control method for a full-power fuel cell air compressor
  • A double-layer predictive control method for a full-power fuel cell air compressor

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Embodiment Construction

[0068] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0069] Please refer to figure 1 , the present invention provides a double-layer predictive control method for a full-power fuel cell air compressor,

[0070] Specifically include the following steps:

[0071] Step S1: construct fuel cell cathode flow model;

[0072] Step S2 constructs a two-layer predictive control system, including an upper-level predictor and a lower-level predictive controller;

[0073] Step S3: The upper-layer predictor takes the real-time speed V(k) measured by the speed sensor as input, and predicts the vehicle speed sequence {V(k+1), V(k +2),...,V(k+10)}, through the vehicle dynamics relation, the power {P r (k+1),P r (k+2),...,P r (k+10)};

[0074] Step S4: input the power required to be provided by the fuel cell in the next ten moments into the fuel cell cathode flow model, and obtain the air flow reference value at the ...

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Abstract

The invention relates to a double-layer predictive control method for an air compressor of a full-power fuel cell electric vehicle. The upper-level predictor predicts the vehicle speed in real time, calculates and obtains the power required by the fuel cell vehicle at the corresponding vehicle speed, and calculates the power required by the fuel cell air compressor calculated by the upper-level predictor through the fuel cell cathode flow model. The output air flow is used as the reference flow for the underlying predictive controller. The underlying predictive controller predicts the required output air flow of the fuel cell air compressor based on the reference flow, and at the same time obtains the control voltage of the air compressor, and then realizes the control of the output flow of the air compressor to meet the oxygen required by the fuel cell stack reaction. quantity. The invention can predict the speed of the vehicle and the required output air mass flow rate of the fuel cell air compressor, and utilize the controller to control the output flow of the fuel cell air compressor, so as to realize efficient and stable operation of the vehicle.

Description

technical field [0001] The invention relates to the technical field of fuel cell auxiliary systems, in particular to a double-layer predictive control method for a full-power fuel cell air compressor. Background technique [0002] Fuel cells convert chemical energy into electrical energy through electrochemical reactions, and use fuel and oxygen as raw materials, and have no mechanical transmission parts, so they have the advantages of high efficiency, no noise, and no pollution. From the perspective of saving energy and protecting the ecological environment, fuel cells are the most promising power generation technology. Today, fuel cell power generation, as a new generation power generation technology, has broad application prospects, and substantial progress has been made in research as vehicle power. The main accessories of the fuel cell are air compressor, humidifier, cooler and hydrogen circulation pump, among which the air compressor is the main component of the catho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042H01M8/04992
CPCG05B19/0423G05B2219/25257H01M8/04992Y02E60/50
Inventor 王亚雄陈锦洲林飞陈家瑄
Owner FUZHOU UNIV
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