A power adaptive adjustment method for ht-pem methanol water fuel cell

Abstract

The invention discloses a power adaptive adjustment method of HT-PEM methanol-water fuel cell, which belongs to the field of fuel cell technology. The main controller detects the stack output power Po and the load output power P1 in real time, and outputs the detected stack output power. The power Po is compared with the load output power P1. When the stack output power Po is equal to the load output power P1, the main controller does not process; when the stack output power Po does not match the load output power P1, the main controller passes the coarse adjustment The combination of the control outer loop and the fine-tuning control inner loop makes the stack output power Po match the load output power P1. The invention has good load dynamic response capability, self-adaptive adjustment, fast control response speed, basically no delay, smooth control process, no system vibration, and high stability.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a method for self-adapting the power of an HT-PEM methanol water fuel cell. Background technique [0002] The methanol-water fuel cell based on HT-PEM has the characteristics of strong fuel adaptability, long service life, and large output power, and has a good market promotion prospect. However, due to the poor dynamic response ability of the battery, especially when the fuel cell enters a stable After the power generation stage, when the load fluctuates greatly, the hydrogen intake of the stack of the methanol-water fuel cell cannot be adjusted in time according to the load, which will cause the temperature of the reforming chamber or combustion chamber of the fuel cell to fluctuate sharply until a large fluctuation occurs. Over-temperature protection to interrupt the power generation process. [0003] Therefore, it is necessary to design a good fuel cell power ...

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Problems solved by technology

[0007] 1. This method is only applicable when the load change of the fuel cell is known. When the real load fluctuates, the change direction of the output power cannot be predicted, so the method cannot work;

[0008] 2. The power adjustment process of this method is relatively slow, the delay phenomenon is obvious, and the dynamic performance is poor;

[0009] 3. Because this method will first adjust the power in reverse when adjusting the power, it may cause system oscillation in some cases, and there is a risk of control interruption

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