I'm using the simscape block "fuel cell stack", I get an error in 'Fuel_Cell/Fuel Cell Stack/Mode​l/Continuo​us//Detail​ed/Subsyst​em1/MATLAB Function4' (line 7)

[Manish]

Hi,

I tested the model you provided, and it appears that the error occurs when the input current for 'calculateUtilization' is negative.

In all other cases, it seems to be functioning correctly.

[Giuseppe]

@Manish

Hi!

Thanks for the reply; could you tell me how to compensare for this error.

Answer 1

[Divyam]

Hi @Giuseppe Di Coste,

It appears that the inputs to the "calculateUtilization" function are failing certain assertions when running your model. Although there is no mention of these assertions in the documentation, it can be assumed that the following conditions need to be met to ensure that fuel utilization is appropriately calculated for the fuel cell:

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Check the inputs to the "calculateUtilization" function and ensure that any inputs that violate the above assertions are adjusted to satisfy these conditions. I have personally observed that when the volumetric flow rate of fuel is too low, the fuel utilization increases beyond the maximum value of 1 and breaks other checks placed in the model.

If the issue you are facing persists even after ensuring that all the assertions are satisfied, I highly recommend exploring the use of the fuel cell block in Simscape -> Electrical -> Sources for your modeling needs rather than the Specialized Power System blockset, as there is more documentation and support available for these libraries.

To check out the Simscape Electrical resources for modeling, refer to this documentation: https://www.mathworks.com/help/sps/index.html