An expert system for startup optimization of combined cycle power plants under NO{sub x} emission regulation and machine life management
- Hitachi, Ltd., Hitachinaka, Ibaraki (Japan). Hitachi Research Lab.
- Hitachi, Ltd., Ibaraki (Japan)
- Babcock-Hitachi K.K., Kure, Hiroshima (Japan), Kure Research Lab.
This paper proposes an expert system which optimizes the startup schedule for gas and steam turbine combined cycle power plants. The speed-up and load-up pattern of the plant is automatically optimized through an iterative process. Plant dynamics models representing quantitative knowledge and fuzzy rules representing qualitative knowledge are alternately used in the optimization process to modify the schedule parameters. The rules represent expertise on causal relations between modification rates of the schedule parameters and operational margins for constraints, i.e., NO{sub x} emission and machine thermal stresses. Simulation analysis with a three pressure staged reheat type 235.7MW rated capacity plant shows that the system provides quick and economical plant startup under NO{sub x} emission regulation and reliable machine life management. Startup energy loss is reduced due to the reduction in startup time. Furthermore, optimum operating conditions are quickly reached with the expert system.
- OSTI ID:
- 276828
- Report Number(s):
- CONF-960111-; ISSN 0885-8969; TRN: IM9636%%503
- Journal Information:
- IEEE Transactions on Energy Conversion, Vol. 11, Issue 2; Conference: IEEE Power Engineering Society (PES) Winter meeting, Baltimore, MD (United States), 21-25 Jan 1996; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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