Pressure Control Loop PID Parameters

[Peckett]

Hi all,

I am interested in pre calculating my PID loop parameters for a pressure control system for a gas pipeline.

The pipeline draws methane gas from a landfill up to a blower station. The blower station draws a slight vacuum in the landfill (~ -8kPa) and provides pressurised gas to a flare at 20kPa.

The gas pipeline has a volume of approximately 250m^3. The typical gas flow is ~ 2,000 to 3,000 m^3 per hour.

Based on 10% change in gas inflow, a 10% change in pressure would take ~5 minutes. It appears to be quite a slow acting loop and so I would think the k and I terms would be relatively low.

Can anyone give some guidance on how to calculate the K and I terms for a PID loop.

Thanks for your advice on this.

 

[BigInch]

The integral term should effectively be zero. For pipelines only the proportional parameter is important.

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