Power-station auxiliaries¿a review of some practical aspects

As boiler/turbine units become larger, auxiliary electrical machines of increased size are being used in greater numbers in modern power stations. These drives, which can absorb 120 MW of the total power generated, are in the form of a.c. induction motors, or, for the alternator, a d.c. exciter, or, more recently, an a.c. generator/excitor with rectifiers. This survey gives some idea of the sizes and types of motors and drives in use.