Prediction of load characteristics of turbogenerators

A method is described for the determination of the excitation requirement of a turbogenerator, on load at any power factor, from the dimensions of a design and from the magnetic properties of the stator and rotor cores. As a test of the accuracy of the method, magnetisation curves have been computed for a large generator and compared with test results. The comparison shows that the prediction is sufficiently accurate for all practical purposes. For a typical design of large generator, the effect of design changes is explored with a view to design optimisation. This gives results which are of practical significance and which demonstrate the use of the program as a design tool.