Effects of forced power transfer on high speed generator-load systems

A computer-aided method for investigating disturbances due to the forced paralleling of out of phase high speed salient pole AC generator systems feeding isolated loads is presented. The method is used to predict the system performance including the reverse voltage across the rotating bridge rectifier of the field exciter. This paper presents the fundamentals and the modeling approach used in the development of this method. In addition, the results of using this approach to compute the machine parameters under different load conditions including saturation effects due to magnetic material nonlinearities and space harmonics effects due to machine geometry and winding layouts are presented. The computed parameters are validated by comparison to test data. These parameters form the main data for simulating the forced paralleling of out of phase high speed salient pole AC generator systems feeding isolated loads. Further, the results of using this modeling approach in a case study to predict the system performance due to forced power transfer are summarized and are shown to be in good agreement with test data.