M
Hi all,
I have a level controlled surge tank, that discharges via a centrifugal pump with VSD.
Most literature I have read describes pumped tank level control as an integrating or non self regulating process. But for a fixed control output (pump speed), the discharge flow rate is affected by the tank level (increasing level = less system head = increased flow per pump curve). This adds a degree of self-regulation to the system, correct? (Unlike say a PD pump, where discharge flow rate is tied only to the control output).
How does this then affect tuning of a PID controller?
I have a level controlled surge tank, that discharges via a centrifugal pump with VSD.
Most literature I have read describes pumped tank level control as an integrating or non self regulating process. But for a fixed control output (pump speed), the discharge flow rate is affected by the tank level (increasing level = less system head = increased flow per pump curve). This adds a degree of self-regulation to the system, correct? (Unlike say a PD pump, where discharge flow rate is tied only to the control output).
How does this then affect tuning of a PID controller?