MISO Energy Storage Study Phase 1 Report - Utility Wind ...

LIST OF FIGURES
Figure 1-1: RPS Mandates and Goals Within the MISO Footprint (Source MISO).................... 1-3
Figure 2-1: Average Hourly Wind Generation and Prices in MISO 2008-2011 (Source
Iowa Stored Energy Park Analysis).................................................................................... 2-2
Figure 2-2: Operational Planning Timeframes in ISO Balancing Markets (Source EPRI) ......... 2-4
Figure 2-3: MISO Wind Curtailment 2008-2010 (Source MISO State of Market Monitor) ......... 2-7
Figure 3-1: Representative Positioning of Energy Storage Technologies (Source EPRI) ......... 3-3
Figure 3-2: FERC Registered Pumped Storage Projects, July 2011 ......................................... 3-4
Figure 3-3: Pumped Storage Capacity Worldwide (GW) Source MISO..................................... 3-5
Figure 3-4: Fast Response Capabilities for Adjustable Speed PHS (Source MISO) ................. 3-5
Figure 3-5: Advanced CAES Plant Schematic (Source:EPRI)................................................... 3-7
Figure 4-1: MISO RT SCED Dispatch Algorithm........................................................................ 4-5
Figure 5-1: EGEAS and PLEXOS Model Interaction ................................................................. 5-2
Figure 5-2: EGEAS Screening Curve with PSH and CAES (PHS and CAES are “mid”
values - $2250/kW and $1250/kW respectively, CO2 tax= 0 in this case, Source
MISO)................................................................................................................................. 5-6
Figure 5-3: 2011 Installed Capacities by Fuel Category Assumption for MISO Energy
Study .................................................................................................................................. 5-9
Figure 5-4: PLEXOS CAES Storage Model Output (Source Energy Exemplar) ...................... 5-11
Figure 6-1: One Branch of the EGEAS Energy Storage Analysis Decision Tree....................... 6-2
Figure 6-2: Results from Phase 1 EGEAS Energy Storage Analysis Showing
Circumstances Where CAES is Selected .......................................................................... 6-2
Figure 6-3: Simple Load Duration Curve Illustration Showing Wind Impact on Storage
Charging and Generation................................................................................................... 6-4
Figure 7-1: Detailed vs Aggregated Transmission Areas for PLEXOS Simulation .................... 7-2
Figure 7-2: Three Stage Process to Decompose Long-Term Storage Constraints into the
Real Time Market with PLEXOS ........................................................................................ 7-4
Figure 7-3: PLEXOS Initial Results – CAES. Higher Variable Costs and Efficiency
Losses Cause CAES to Only Operate for Limited Periods ................................................ 7-5
Figure 7-4: PLEXOS Initial Results – PHS. At a Lower Variable Cost Than CAES, PHS
Operates more Frequently ................................................................................................. 7-5
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