<strong>PacifiCorp</strong> – <strong>2007</strong> IRPChapter 7 – Modeling andTable 7.49 – Capacity Additions for the Initial CEM GHG Emissions Performance StandardPortfolioCumulative NameplateCapacity by Period (MW)<strong>Resource</strong> <strong>2007</strong>-2016 <strong>2007</strong>-2026Gas - CCCT 1,507 6,410Renewables 1,900 3,100DSM 137 156IGCC with CCS - -As noted above, the CEM was not constrained to select certain resource amounts in certain yearsor areas. One consequence of this model set-up is that the resulting CEM portfolio does not reflectan investment schedule that is advantageous from a stochastic cost and risk standpoint. Anotherconsequence is that the model’s wind investment pattern differs significantly from whatwas identified in <strong>PacifiCorp</strong>’s preferred portfolio. For example, the model did not recognizegeographical RPS requirements in placing renewable resources; all wind resources were added inthe east side until 2018. Additionally, the CEM included more renewables in <strong>2007</strong> than the preferredportfolio (700 megawatts versus 400 megawatts in the preferred portfolio), which is notpractical from a procurement perspective.To address these two issues, <strong>PacifiCorp</strong> first subjected this portfolio to stochastic simulation tocreate baseline stochastic results. Then, the CEM was executed again after applying resourceconstraints to the portfolio. These constraints include (1) limiting renewables to <strong>30</strong>0 megawattsin <strong>2007</strong> 66 , (2) adding an east-side CCCT in 2011 to replace a portion of front office transactions,and (3) fixing the east-side CCCT resource selected in 2011. The resulting CEM portfolio wassimulated with the PaR model, and stochastic results compared against those of the originalCEM portfolio. These resource constraints reduced stochastic mean PVRR by $144 million, riskexposure by $671 million, and upper-tail risk by $816 million. Table 7.50 shows the resourceadditions for the final GHG emission performance standard portfolio from <strong>2007</strong> through 2026.As with the other risk analysis portfolios, load growth and capacity reserve requirements are metwith CCCT growth stations after 2018.Stochastic Cost and Risk ResultsTable 7.51 provides the stochastic cost and risk results for the GHG emission performance standardportfolio by CO 2 cost adder case. Results are shown for both the CO 2 tax and cap-and-tradecompliance scenarios. Figures 7.37 through 7.39 show the cost-versus-risk trade-off of the portfolioin relation to the other Group 2 risk analysis portfolios assuming the CO 2 cap-and-tradescenario. Figure 7.37 is a scatter plot of the cost and risk measures based on the average of thefive CO 2 adder cases, while Figures 7.38 and 7.39 show the cost and risk results for the $0 and$61 CO 2 adder cases, respectively.66 The remainder of the renewables investment schedule was not altered in order to minimize manual portfoliochanges.214
<strong>PacifiCorp</strong> – <strong>2007</strong> IRP Chapter 7 – Modeling and Portfolio Selection ResultsTable 7.50 – <strong>Resource</strong> Investment Schedule for the Final GHG Emissions Performance Standard PortfolioNameplate Capacity, MWEastWest<strong>Resource</strong> <strong>2007</strong> 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026CCCT, 2 x 1 F Class - - - - 548 548 - - - - 548 - 1,096 - - 548 - - - 548Renewables, SE ID 200 - - - - - - - - 200 - - - - - - - - - -Renewables, WY 100 700 - 200 - 100 - - 200 - - - - - - - - - - -Renewables, NV - - - - - - - - - - 200 200 - - - - - - - -DSM, Class 1 and 3 - - - - - 7 7 7 - - 52 52 52 - - - - - - -Front office transactions - - - 486 550 158 1<strong>30</strong> 563 98 700 505 556 - - - - - - - -CCCT, 2 x 1 F Class - - - - - 602 - - - - - - 602 - - - 602 - 602 -CCCT, 1x1 G Class - - - - - - - - - - 392 - - - - - - - - -Renewables, SE WA - - - - - - - - - - 200 - - - - - - - - -Renewables, MT - - - - - - - - - - - 400 - - - - - - - -Renewables, NC OR - - - - - - 100 - - - - <strong>30</strong>0 - - - - - - - -DSM, Class 1 and 3 - - - - - 3 3 3 - - 19 19 20 - - - - - - -Front office transactions - - - 69 311 400 500 250 250 416 250 250 - - - - - - - -Total Annual Additions <strong>30</strong>0 700 - 755 1,409 1,818 740 823 1,048 1,316 2,167 1,778 1,770 - - 548 602 - 602 548Table 7.51 – Stochastic Cost and Risk Results for the Final GHG Emissions Performance Standard PortfolioCO2 CostAdder Case(2008 $)Stochastic MeanPVRRStochastic Results (Million $) – CO2 Tax Basis5thPercentile95thPercentileUpper-TailMeanRiskExposureStandardDeviation$0 23,2<strong>30</strong> 14,637 37,387 70,858 47,628 13,046$8 26,950 16,244 42,547 78,253 51,<strong>30</strong>3 14,152$15 28,731 17,754 45,152 81,756 53,026 14,695$38 34,956 21,172 54,802 95,420 60,465 17,063$61 41,227 24,484 64,948 110,445 69,218 19,823Stochastic Results (Million $) – CO2 Cap and Trade BasisCO2 CostAdder Case(2008 $)Stochastic MeanPVRR5thPercentile95thPercentileUpper-TailMeanRiskExposureStandardDeviation$0 21,922 13,3<strong>30</strong> 36,080 69,550 47,628 13,046$8 22,033 11,327 37,6<strong>30</strong> 73,336 51,<strong>30</strong>3 14,152$15 22,014 11,037 38,435 75,039 53,026 14,695$38 21,470 7,687 41,316 81,935 60,465 17,063$61 20,577 3,834 44,298 89,795 69,218 19,823215
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