The paper presents a number of techniques developed at AEE Winfrith for assessing and improving dynamic simulation models. A method for selecting best-fit parameters for control engineering applications is discussed first. Then, in the main body of the report, the concept of model-distortion is developed, whereby a model's validity may be assessed quantitatively by the extent of time-variation or distortion needed in its nominally constant parameters to match a recorded transient perfectly.
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Butterfield et al. (1986) studied this question.
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