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A control method of mimo system based on ht-pem methanol water fuel cell

A fuel cell and control method technology, applied in the direction of fuel cells, circuits, electrical components, etc., can solve problems such as poor overall control effect, complex control software design and parameter debugging, and achieve stable work, simplified design and parameter debugging, parameter clear effect

Active Publication Date: 2022-05-20
西安新衡科测控技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing HT-PEM methanol-water fuel cell MIMO system includes three control loops: fuel cell reforming chamber temperature control loop, fuel cell stack output power control loop, and fuel cell cooling system control loop. These three control loops need to control Objects include: combustion chamber inlet temperature, combustion chamber outlet temperature, reforming chamber inlet temperature, reforming chamber outlet temperature, stack inlet temperature, stack outlet temperature, bottom forced heat dissipation temperature, coolant cooling system temperature and stack output power and other parameters, the feedback signal includes the temperature sensor signal at each position above, the pressure signal of the cooling system, the feedback signal of the liquid inlet pump, the feedback signal of the fan, etc., and the control output includes the speed of the liquid inlet pump in the combustion chamber and the speed of the liquid inlet pump in the reforming chamber , heating device driving signal, cooling pump speed, oxygen supply fan speed and forced cooling fan, etc. This is a typical MIMO system. The existing solution is to design multiple different single-input and single-output control loops, and each loop is designed differently. The control and correction links and parameters of the system lead to complex control software design and parameter debugging, and the overall control effect is poor

Method used

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  • A control method of mimo system based on ht-pem methanol water fuel cell
  • A control method of mimo system based on ht-pem methanol water fuel cell
  • A control method of mimo system based on ht-pem methanol water fuel cell

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Embodiment 1

[0037] This embodiment provides a control method based on HT-PEM methanol-water fuel cell MIMO system, and implements the present invention through basic necessary technical features to solve the problems raised in the technical background section of this application document.

[0038] Specifically, the present invention provides a control method based on HT-PEM methanol water fuel cell MIMO system, which decomposes the MIMO control of HT-PEM methanol water fuel cell into three independent SISO control loops, and three independent SISO control loops The system works independently and in parallel. The three independent SISO control systems are the fuel cell reforming chamber temperature control loop, the fuel cell stack output power control loop, and the fuel cell cooling system control loop.

[0039] In this example, according to the physical properties of the HT-PEM methanol-water fuel cell, the MIMO control of the existing HT-PEM methanol-water fuel cell is simplified into th...

Embodiment 2

[0041] This example is based on Example 1 and optimizes the implementation in Example 1, so that this example is more stable and has better performance during operation, but it is not limited to the one described in this example implementation.

[0042] In this embodiment, the closed-loop control algorithm may use a two-position control algorithm, a two-position control algorithm with hysteresis or a three-position control algorithm.

[0043] The input of the temperature control loop of the fuel cell reforming chamber in the above embodiment is simplified in order according to the working sequence of the fuel cell:

[0044] The first stage is the cold start-up stage of the fuel cell. In this stage, the control input is the control voltage Vh of the combustion chamber heating device, and the control output is the inlet temperature Th1 of the fuel cell combustion chamber. The control goal of this stage is to adjust Vh so that Th1 can quickly reach 175°C , the conventional close...

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Abstract

The invention discloses a control method based on the HT-PEM methanol-water fuel cell MIMO system, which decomposes the MIMO control of the HT-PEM methanol-water fuel cell into three independent SISO control loops, and the three independent SISO control systems are independently parallel The three independent SISO control systems are the fuel cell reforming chamber temperature control loop, the fuel cell stack output power control loop, and the fuel cell cooling system control loop. The present invention simplifies the MIMO control of the existing HT-PEM methanol-water fuel cell into three independent SISO (single-input-single-output) control systems, which are respectively the fuel cell reforming chamber temperature control loop and the fuel cell stack output power control loop and the fuel cell cooling system control loop, which significantly simplifies the design of the control software and parameter debugging, and improves the control effect of the entire system.

Description

technical field [0001] The invention relates to the technical field of methanol-water fuel cells, in particular to a control method for an MIMO system based on HT-PEM methanol-water fuel cells. Background technique [0002] The methanol-water fuel cell based on HT-PEM has the characteristics of strong fuel adaptability and high output power density. Its general composition is as follows: figure 1 As shown, in order to make the fuel cell work normally, we need to control the reaction temperature of each key part of the fuel cell within the specified range, and also need to adjust the amount of hydrogen gas, that is, methanol water, according to the output power of the stack. At the same time, in order to ensure the smooth progress of the chemical reaction, it is necessary to control the speed of the combustion chamber and the stack oxygen supply fan. Finally, it is necessary to control the cooling liquid circulation pump and the forced cooling fan related to the stack heat ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04701H01M8/04858H01M8/04992
CPCH01M8/04738H01M8/0494H01M8/04723Y02E60/50
Inventor 荆涛
Owner 西安新衡科测控技术有限责任公司