GNOCIS -- 1999 update on the generic NOx control intelligent system
G. Hollinden, John Sorge, M. Slatsky, J.G. Noblett, G. Warriner · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1999
The Generic NOx Control Intelligent System (GNOCIS) is an on-line enhancement to digital control systems and plant information systems targeted at improving unit performance parameters such as heat rate, boiler efficiency, NOx emissions, and fly ash carbon levels. The GNOCIS methodology utilizes a neural network model of the boiler combustion process and when applicable, other plant processes. The software applies an optimizing procedure to identify the best set points for the plant, which are implemented automatically without operator intervention (closed-loop), or, at the plant's discretion, conveyed to the plant operators for implementation (open-loop). GNOCIS development was funded by the Electric Power Research Institute, PowerGen, Radian International, Southern Company, U.K. Department of Trade and Industry, and U. S. Department of Energy. As of January 1999, there were over 50 active or planned GNOCIS installations representing greater than 25,000 MW of generation. This paper will highlight several of the active GNOCIS projects, discussing implementation issues and results.