Abstract :
Industry, in general, has been adopting the electric motor drive and its control to all types of machines. In the central station, where sequential and correlated operation is a necessity, the use of electric-motor-driven auxiliaries also has shown a marked increase. All recent stations have been built with a major portion of their auxiliaries driven by electric motors. The author suggests the use of the station generator bus as the most reliable source of auxiliary-power supply in electric stations of a closely interconnected system similar to that in the Chicago area. Separate auxiliary service units, not exceeding in size the requirements of the largest turbogenerator unit, also are recommended.
