The Development of a High Reliability Auxiliary Power System for a Coal-Fired Cycling Generating Station

An auxiliary system for a fossil generating station is evolved based on operating and reliability criteria including the capabilities of switchgear and standard auxiliary transformer impedances. These criteria are used to design a flexible and reliable auxiliary power system for a cyclic duty power generating station. The effect of mechanical equipment selection on the auxiliary power system design is discussed. An economic comparison of single voltage versus dual-voltage is made. A one-line diagram of the resulting proposed system is included.