Scada System Requirements for Optimum Pumpingby Vilas Nitivattanannon, Univ of Pittsburgh, Pittsburgh, United States,
Elaine C. Sadowski, Univ of Pittsburgh, Pittsburgh, United States,
Rafael G. Quimpo, Univ of Pittsburgh, Pittsburgh, United States,
Abstract: In order to minimize the cost of electric energy for pumping water through its distribution system, a computer program was developed to schedule the operation at eight pumping stations which support the water distribution system for the City of Pittsburgh. The algorithm is based on a dynamic program formulation which takes advantage of the time-of-use discount for electricity and storage capacities of reservoirs which serve the system. With the program, pump schedules may be generated which have been shown to result in energy savings that average to 15 percent of the historical unoptimized cost. To optimize pumping, it is necessary to track the time variation of demand in the system. In a typical system, water demand is spatially distributed. A practical approach to estimating zonal demand is by taking a mass balance between the pumping rates in and out of a pump-reservoir-pump module and using the changes in reservoir storage to estimate the water demand for the area served by the reservoir. Telemetered data is needed to get real-time information on pumping rates and reservoir levels. The program uses this information to determine the pump schedule. Data acquisition requirements to generate the water demand input file for the optimization program are discussed.
Subject Headings: Pumps | Water supply systems | Water demand | Water conservation | Scheduling | Reservoirs | Hydro power | Pennsylvania | Pittsburgh | North America | United States
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