Hi Experts?
I am very greatful to this site who helps me on each steps but now i am stuck to tune up the PID setting of the gas turbine fuel.
I hope many experts are there who helps me out. I attached an image while PID Enable.
First of all i mark two lines on the image. I can not understand that is it a PV minimum (00000)or maximum (11522)?
At that time SP increase or decrease by the user the following logic execute. For example user press the push button a 1 is add in the previous setpoint and then this setpoint is converted into frequency. Suppose 62% is equal to 7144 of the 11522 Hz.
Now PV is directly address by the %AI (Frequency).
But the problem is that there is always a error show within 1 second so the speed sometime goes too 61% or some time goes to 63% if the setpoint is 62%.
I want to use percentage instead of %AI and as well as SP is also in percentage. But when i do it the engine is contineously rampup and shutdown.
I also change the 11522 (which i mark) to 100 when using percentage with same gains.
CV is not manipulated when using %age at SP and PV it shows always 20000(Lower clamp) and 0%.
How can i minimize the speed variation?
Is KP increase or decrease? Is KI increase or decrease?
My scan time while engine is running is 15ms. I set the sample time to 10 ms is it correct?
i want that when both error is zero then speed not changed untill user increase or decrease the setpoint.
whenever user increase the setpoint suppose 62% to 65% the PV goes to 66% then back to 63% and after that it stays on 65% but after sometime 64 to 65 flactuation noted.
I check the noise but there is nothing found.
I hope guys you will help me.
Thanking you i will remain
Regards
I am very greatful to this site who helps me on each steps but now i am stuck to tune up the PID setting of the gas turbine fuel.
I hope many experts are there who helps me out. I attached an image while PID Enable.
First of all i mark two lines on the image. I can not understand that is it a PV minimum (00000)or maximum (11522)?
At that time SP increase or decrease by the user the following logic execute. For example user press the push button a 1 is add in the previous setpoint and then this setpoint is converted into frequency. Suppose 62% is equal to 7144 of the 11522 Hz.
Now PV is directly address by the %AI (Frequency).
But the problem is that there is always a error show within 1 second so the speed sometime goes too 61% or some time goes to 63% if the setpoint is 62%.
I want to use percentage instead of %AI and as well as SP is also in percentage. But when i do it the engine is contineously rampup and shutdown.
I also change the 11522 (which i mark) to 100 when using percentage with same gains.
CV is not manipulated when using %age at SP and PV it shows always 20000(Lower clamp) and 0%.
How can i minimize the speed variation?
Is KP increase or decrease? Is KI increase or decrease?
My scan time while engine is running is 15ms. I set the sample time to 10 ms is it correct?
i want that when both error is zero then speed not changed untill user increase or decrease the setpoint.
whenever user increase the setpoint suppose 62% to 65% the PV goes to 66% then back to 63% and after that it stays on 65% but after sometime 64 to 65 flactuation noted.
I check the noise but there is nothing found.
I hope guys you will help me.
Thanking you i will remain
Regards