Voltage dip in A-C generators

THE MAGNITUDE and duration of the voltage dip during sudden application of load to an a-c generator under regulator action often is required to determine disturbance to other equipment on the system. Point-by-point methods, although accurate, require considerable time to apply. An analytical solution has been used covering machines with self-excited exciters operating below appreciable saturation. The first few cycles generally were disregarded as this permits neglecting the effect of dampers and sub transient voltage drop.