This paper describes the evolution of the control system for the 50 MW Rolls-Royce/Westinghouse TRENT Econopac Power Generation Unit. The prime mover for this power plant is derived from the Rolls-Royce TRENT 800 Aero gas turbine and incorporates the new staged Dry Low Emission combustion system. The generator is standard air cooled design and is procured and integrated into the compact Econopac unit by Westinghouse.

The paper discusses the design objectives for the control system and the resulting hardware and software requirements. The design objectives include conformance to applicable safety and hazardous standards, efficient emission and fuel control for dual fuel (gas and liquid) operation, high reliability and availability and extensive fault diagnostic and condition monitoring for ease of plant operation and maintenance.

The control system design and development relies heavily on the use of real time simulator (RTS) incorporating non linear real time models of the engine and the many sub systems such as the gas fuel distribution system, liquid fuel/water system, vibration system etc. which are controlled by the control system. The paper covers the development of these models and their use in the RTS in the dry and wet hardware in the loop testing.

The paper concludes with a review of the planned engine/econopac development testing leading up to full control system validation and certification to the Rolls-Royce/Westinghouse internal and applicable external acceptance standards.

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