Improvement in accuracy of prediction of electrical machine constants and generator models for subsynchronous resonance conditions. Volume 2. Application of two-dimensional finite-element techniques for synchronous machine modeling. Final report

Volume 1 of this report describes the development of three-dimensional vector potential finite element techniques for the calculation of 3-D magnetic fields in turbine-generators and other devices. Both nonlinear magnetostatic and linear eddy current versions were successfully formulated and verified against known analytical solutions or simple tests. The magnetostatic version was demonstrated on turbine-generator geometry. Volume 2 describes the application of 2-D finite element techniques for the calculation of generator equivalent circuit models for system simulation studies. Results of the calculation of operational inductances are validated by test. This successful validation suggests that the methods developed are capable of producing significantly better generator simulation models than those now in use. A further advantage is that the method uses direct analysis of the generator design (without the need for empirical correction), allowing prediction of generator characteristics during the design process.