Graduate Thesis Or Dissertation
 

Parameter sensitivity algorithm for a digitally-modelled direct current excitation system

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  • An algorithm for computing the parameter sensitivities of an excitation system for a hydroelectric generation system is developed for model analysis in this thesis. The IEEE Type 1 excitation system representation, linked with a simplified alternator and voltage regulator equivalent, provide a closed-loop model for digital simulation. Parametric sensitivities are derived from computations upon the transient exciter field voltage response caused by a perturbation of the regulator reference voltage. The digital-analog simulator language, MIMIC, was utilized to implement the model. Exciter field voltage responses from models differing by variations in one parameter are converted to sensitivities by a FORTRAN program. Sensitivities, exciter field voltages and system parameters are listed as output data. A line printer plotting routine provides several types of graphic representation for the sensitivity responses. A broad range of model specifications was executed to demonstrate the utility of these programs. Observations directly from the sensitivity results revealed the effects of parameter derivations upon the system's response. Program flexibility, providing the user with a wide range of options in both model specification and information output, received major emphasis throughout this study.
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