Abstract
Although Luenberger-type observers have been studied for the past two decades, not much has been reported on the industrial application of such observers for more complex processes. This paper discusses a state observer system for the reconstruction of transient flow and pressure in high pressure natural gas transmission networks. Such networks must be considered large-scale, nonlinear, distributed parameter systems. An application-oriented technique for the design of a network state observer is summarized and results from industrial applications of the corresponding observer program GANBEO are reported. The ideas presented in this paper are based on three years of experience with various industrial applications of this large-scale observer system.
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