Figure 5 – “Information rich” data for PITOPS PID tuning method
PITOPS identification method is not sensitive to oscillatory data containing PV overshoots or undershoots (as observed on the left side of Figure 5 ). PITOPS identification doesn’t require any data conditioning, which mostly refers to: removing outliers from data, data filtering, generating more data due to data missing points, data resampling methods and others which are typically needful when using old-fashion approaches. For better understanding which kind of data behavior PITOPS can easily handle, the PID was deliberately moved several times with a different behavior (SP step change, SP ramp change, OP step change and oscillatory cascade mode ).