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<br /> <br />Stand-alone <br />Evaluation <br /> <br /> <br />Calculate>l!lve.lized <br />iCO$t~$. <br />C~pacitYfac::to~ <br /> <br />Short-term <br />(Seasonal) <br />Evaluation <br /> <br />....o.....-__.____~_.__. <br /> <br /> <br />C<i!'1bilie~Il1O~~~S <br />!lll~.prodl.!~~ . <br />f'!JlPly>..~.urve.s.>'.. <br /> <br />Figure 2: Evaluation of Proposals! <br /> <br /> <br />1m <br /> <br />during the replacement resource acq~isi- <br />tion process. To prepare this test, an' <br />extensive data gathering, analysis, model <br />development, and model implementation <br />effort was undertaken. These tasks (were <br />collectively referred to as the "proofJof- <br />I <br />concept" analysis. ' <br />I <br />The goal of the proof-of-concept <br />analysis was to develop an integrated <br />system of models that could be used ~o <br />evaluate proposals and to demonstrate <br />their use through examples. A detailed <br />modeling approach was required to I <br />provide accurate assessments of the) value <br />of replacement resources. Because lof the <br />seven-state geographic span of Wes~ern's <br />SLeA/IP marketing area, the proofiof- <br /> <br />concept analysis involved developing a <br />detailed model of a large part of the <br />interconnected electrical system in the <br />western United States, covering a large <br />part of the Rocky Mountain and Desert <br />Southwest regions of the United States, <br /> <br />It was also necessary to identify data <br />sources accessible to Western, and to <br />gather, process, and integrate a large <br />amount of data into the models. Data <br />acquisition and modeling over such a large <br />area required a significant investment of <br />time and effort, but produced integrated <br />modeling tools which will form the basis <br />for a useable resource analysis system. <br />This system will benefit Western and its <br />customers not only for the replacement <br />