A methodology for generating distribution system pumping schedules in the presence of maximum demand charges and multiple pressure zones /
A methodology is presented for generating pump schedules for water distribution systems. The minimum energy consumption pump scheduling problem has been characterized in the literature as a discrete, non-linear, and generally non-convex problem. For this reason dynamic programming has been the tra...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Summary: | A methodology is presented for generating pump schedules for water distribution systems. The minimum energy consumption pump scheduling problem has been characterized in the literature as a discrete, non-linear, and generally non-convex problem. For this reason dynamic programming has been the traditional approach to pump station scheduling. The 'consideration of a cost function 'with components for maximum kW demand as well as energy consumption introduces another characteristic: nonseparability. For distribution systems comprised of multiple pressure zones, the optimization problem has a decision space of rapidly increasing dimension due to the possibilities for interaction between pressure zones. This work is concerned with the development of a scheduling methodology that will perform under a ratchet maximum kW demand rate structure in a multiple pressure zone environment. A dynamic programming algorithm is modified to provide status information about each station. This status information then drives an assignment algorithm designed to allocate interzone transfers. Thus, rather than deal with the fully dimensional optimization problem the methodology works With the smaller, easily managed pump station problems, and subsequently focuses on inter-zone transfers with the connectivity between zones, excess capacities, and shortage conditions defined. |
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| Item Description: | Vita. "Major Subject: Industrial Engineering". |
| Physical Description: | xv, 160 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references. |