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<br />..OuG325 <br /> <br />The Resident Power and Reservoir System Model (PRSYM) <br /> <br />Once system constraints have been satisfied, there may still exist a range of feasible solutions <br />or operating plans. This module must, therefore, include a simplified method for selecting <br />an 'operationally acceptable' schedule within the available zone of flexibility. For example, <br />in line with a general reservoir operating strategy, the model could attempt to minimize <br />deviations from guide curves or other multipurpose targets while maintaining balanced pool <br />operations. Alternatively, to address power economic concerns, the model could attempt to <br />meet a series of economic hydrogeneration targets or weights which reflect forecasted power <br />system conditions. <br /> <br />Specific functional requirements of the PRSYM simulation module are detailed below. A <br />sChematic overview of PRSYM is presented in Figure 3. <br /> <br />Model Domain <br /> <br />The model must be capable of handling complex reservoir systems of varying sizes and <br />configurations. The reservoir system network must be able to accommodate: <br /> <br />· multiple rivers (i.e., reaches and confluences) <br />· multiple reservoirs <br />· hydro plants <br />· internal hydraulic controls (e.g., weirs) <br />· diversions (e.g., canals), <br />· pumped-storage facilities <br />· thermal power plant intake and/or discharge channels <br />· water quality parameter loading sources <br /> <br />Definition or modification of the reservoir system network should be relatively easy to <br />implement and should not require changes in computer code. This implies that the system <br />network should be specified through the use of input data. It must also be possible to <br />portray and manipulate the network graphically. <br /> <br />As a minimum requirement, the model must be able to accommodate TVA's 50 major <br />projects on the Tennessee and Cumberland River Systems. An overview of the TV A <br />reservoir and power system is provided in Appendix B. <br /> <br />Multiple Purposes <br /> <br />The PRSYM model will be applied to reservoir systems that serve multiple purposes, <br />including: <br /> <br />· flood control <br />· navigation <br />· power generation <br />· hydropower generation <br /> <br />3-3 <br />