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Optimal Control of the West Parisian Area Water Supply Network

by Pierre Alla, Lyonnaise Des Eaux, France,
Pierre-Antoine Jarrige, Lyonnaise Des Eaux, France,



Document Type: Proceeding Paper

Part of: Computerized Decision Support Systems for Water Managers

Abstract:

The West Parisian Area regional office of Lyonnaise des Eaux has been equipped with computer-aided optimal decision-making software, using daily water demand forecasts. This tool calculates the optimal control (with regard to economic criteria) of the network facilities (i.e., pumps and valves) using decomposition-coordination, aggregation-disaggregation and dualization methods. The process is split into two steps: one off-line (main calculation of the interactions between the sub-networks and their dynamic programming optimal value functions) and one on-line (hourly feedback using these previous calculations and the actual reservoir levels). The excellent theoretical behavior of this model has to be tempered by some management constraints which are not completely taken into account. The system has been under operation since 1985.

Subject Headings: Water supply systems | Water demand | Water supply | Economic factors | Control systems | Forecasting | Computer software | France | Europe | Paris

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