BLOCK DIAGRAM TRANSFER-FUNCTION MODEL OF A GENERATOR INCLUDING DAMPER WINDINGS

A transfer function model of a system provides an excellent basis for the analysis, explanation and assessment of its dynamic behaviour and in the case of a turbo-generator, the model proposed by de Mello and Concordia has been extensively used for such purposes for many years. The paper presents an extended transfer function block diagram model of a generator based on a standard, widely used and accepted representation, which includes damper windings on both d and q axes and is capable of providing a much more reliable basis for analysis and performance assessment. Frequency response analysis is employed to demonstrate the relative capabilities of the model form and to explain fundamental dynamic characteristics.