Recent trends and progress in synchronous machine modeling in the electric utility industry

Models of synchronous machines which have been developed and used to analyze problems in the electric utility industry are described. The development of alternative models, the transitions among the models, and the relations between problem and model are demonstrated. Lower order models using standardized data are used in multigenerator stability studies. Machine and system tests and the computer results of simulating these tests are reviewed. The areas of agreement and differences between simulation and test for alternate models point to ways in which improvements may be made in the economy and accuracy of computer simulations. This leads to suggestions for future work and a discussion of an IEEE Working Group in this field.