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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Table E-1 <br /> <br />Amount of Pumped Storage Investment Cost <br />That Mav be SUDDorted bv Svstem ODeration - in 1988 $ <br /> <br />Low Load Growth <br />Size $ <br />LM.Y'l1 Der kW <br /> <br />Medium <br />Size <br />!.M.W <br /> <br />25 (1) <br /> <br />Load Growth <br />$ <br />Der kW <br /> <br />Ynr <br />1993 <br /> <br />25 (1) <br /> <br />540 <br /> <br />540 <br /> <br />1996 <br />1999 <br />2001 <br /> <br />150 <br /> <br />1,230 <br /> <br />2002 <br />2003 <br />2004 <br />2005 <br /> <br />75 <br />75 <br /> <br />75 <br />1.5. <br /> <br />450 <br /> <br />560 <br />1,230 <br /> <br />1,230 <br />1,230 <br /> <br />2006 <br />2007 <br />Total <br /> <br />1.5. <br />75 <br /> <br />670 <br /> <br />Hlah Load Growth <br />Size $ <br />!.M.W Der kW <br /> <br />25 (1) 500 <br />75 (1) 1,020 <br /> <br />75 (2) <br />75 <br />75 <br />75 <br /> <br />75 <br />150 <br />75 <br /> <br />75 <br />llQ <br />825 <br /> <br />1,020 <br />1,020 <br />1,480 <br />1,020 <br />1 ,480 <br />1 ,480 <br />1,020 <br /> <br />1,480 <br />1 ,480 <br /> <br />(1) Resulting from individual utility expansion plans; however, with integrated system-wide operations <br />1993 needs could be met through inter-utility purchases of existing capacity. Therefore, the totals <br />do not include those pumped storage additions in 1993. <br /> <br />(2) As discussed in Section 2.4, selection of pumped storage planning criteria was based on 350-MW <br />units. Therefore, the 75-MW additions are considered increments of larger projects that may be <br />shared among utilities or whose additional capacity is sold out of state. Mematively, future studies <br />would have to evaluate any effects resutting from the use of smaller unit sizes. <br /> <br />Conclusions and Recommendations <br /> <br />The primary conclusion of this study is that pumped storage may be economically <br />attractive at the costs identified. During the 1988-2007 time period the study <br />concluded that, for the medium peak load forecast, 450 MW of pumped storage could <br />be added to utility systems with the first increment in year 2002. In the low peak load <br />forecast scenario, only 75 MW is considered attractive and not until the year 2007. If <br />the high peak load forecasts were realized, the amount of economic pumped storage <br />capacity may be increased to 825 MW, with the first increments required as early as <br />1996. Independent operation of the individual utility systems scheduled additional <br /> <br />E-6 <br />