Resistance to gross perturbations of turboalternators with double parallel excitation sulla stabilita alle grosse perturbazioni di un turboalternatore a due vie di eccitazione connesse in parallelo

The functional behavior of a synchronous isotropic turbogenerator with smooth rotor under appreciable disturbance was studied using a simplified mathematical model with two state variables. The machine considered has a rotor equipped with two separate but coupled parallel magnetic axis winding systems. The characteristic parameters of the machine were deduced. In comparison with the synchronous rotor with a serial winding system, the rotor with parallel winding system has much increased limits of stability to gross perturbations. This increase, which grows with the angle between the two winding systems, reaches an optimum value at 60 electrical deg.