| dc.description.abstract | This thesis concerns the development of a single-phase synchronous machine model in time-domain, with instantaneous value output. The model is meant to represent the generator part of the rotary converter used in the Norwegian traction power system (supplying railway). Its function is to convert the 50 Hz frequency of the main grid into 16 2/3 Hz which is the standard frequency of the traction grid in Norway.
The chosen method of modelling is inspired by previous work on this matter. The solution is to model the single-phase machine by using a standard three-phase machine model, with unsymmetrical loading on two of its phases. The third phase is left idle. The equations of the standard synchronous machine model are used.
An adjustment of the parameters is questioned, followed by a suggested set of parameter values on the basis of analysis and mathematical deduction.
A comparative approach is used in the validation of the model. Jernbaneverket has done some measurements of the actual rotary converter, which have been compared to simulations of the model.
According to these comparisons, the model has proven to reflect the general behavior of the rotary converter. High correlation can be achieved by adjusting the parameters. Nevertheless, no conclusion has been made upon the adjustment of the parameters. | |
