AC Auxiliary Power System Design for the Shoubrah El-Kheima Power Station

This paper describes the design of the ac auxiliary power distribution system of a large multi-unit thermal power station located near Cairo, Egypt. The design features unitized auxiliary systems, shared start-up sources, and a combustion turbine-generator capable of feeding into each unit´s electrical auxiliary system. The combustion turbine -generator is utilized both for black start of the station and to supply peaking power when required by the utility system. The auxiliary system configuration and the interrelationship of the design between units provide flexibility for operations and sufficient redundancy to ensure reliable sources of power for plant auxiliaries.