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          \t\t\t\t<br />\n
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          A 1968 IEEE Committee Report (see [B18]) provided initial excitation system reference models. It<br />\n
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          This document, based heavily on the 1981 report, is intended to again update the models, provide models for additional control features, and formalize those models in a recommended practice. To some extent, the model structures presented in this document are intended to facilitate the use of field test data as a means of obtaining model parameters. The models are, however, reduced order models, and they do not represent all of the control loops on any particular system. In some cases, the model used may represent a substantial reduction, resulting in large differences between the structure of the model and the physical system.<br />\n
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