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colinl / node-red-contrib-pid

A node-red PID loop controller node intended for the control of real world processes
Apache License 2.0
26 stars 18 forks source link

suggestion /missing feature #20

Closed nickeeey closed 1 year ago

nickeeey commented 1 year ago

Hi, i want to use your PID Control for a PV Power Control. The Range is 0 to 100, 50 is 0W feed in /out 0 is > 2kw feed out 100 >2kw feed in but my problem is, that at night or when its shady the PID runs away and get very high values. So my only solution is a bad simple P Control.... Maybe i thought of implementing a limit for the output. Can you realize something like that? That would be perfect for me! Thanks

colinl commented 1 year ago

Sorry, I don't fully understand, remember I am not familiar with how your power system works. What are you measuring that is used as the input to the pid (the PV)? What does the output control? What is the setpoint value?

Also show me how the pid node is configured. Also attach a chart showing the pv and output values over a period.

nickeeey commented 1 year ago

sorry for wasting your time, i mixed up two different pid controllers and ended up at the wrong github. Please delete it (i cant)

colinl commented 1 year ago

If you are having problems with integral runaway, which is what this sounds like, then I suggest you try this node, as it has logic to prevent that happening.