PI Controller is not working properly

[MAD61850]

Hi Everyone,

I am working on a solar power plant where I am using a PI controller to control the output power of the solar farm. The data is below:

https://pidtuner.com/#/Jxpm4kqSA1

The controller is not reaching the setpoint and the data is keep fluctuate every ~30s.

 

Could anyone please look at the data and let me know what could be the issue?

 

[pidtuner]

Hi,

Thank you for using pidtuner. Looking at your data, it seems that your step test is not done correctly.
First, the input data does not seem correlated to the output data throughout the experiment, see slide 9 (“Common Mistakes …”) of the following presentation:

https://github.com/pidtuner/pidtuner.github.io/blob/master/assets/doc/PID%20Tuner.pdf

Second, it seems you are saturating your actuator, since the output looks like it achieves a constant growth speed instead of a natural growth curve. Maybe try a smaller step change.

Hope this information helps,

[MAD61850]

Thank you so much for your reply.

Would you mind if we can have 30mins call to talk about the controller?

 

[Author]

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