1. 1 Dale Osborn Midwest ISO February 27, 2008 2008 Wisconsin Renewable Energy Summit Transmission Expansion Opportunities with Wind Energy

2. 2 What has MISO been doing Midwest ISO Transmission Expansion Plan 07 ( MTEP 07) MTEP 08 The presentation will discuss mainly the MTEP 08 Renewable Future energy studies with the MISO-PJM transmission expansion.

3. 3 Types of Studies in MTEP Generation and Interconnection study results are incorporated into MTEP Reliability ( capacity) studies Power flow and stability Loss of load probability Energy studies- this presentation Sub-regional coordination studies Generator outlet for wind

4. 4 What is MISO doing now Generation Interconnection and Transmission Service processing- rolled into MTEP MTEP 08 reliability studies MTEP 09 energy studies Joint Coordinated System Plan Reliability Energy Wind Integration

5. 5 MISO PJM Joint and Common Market

6. 6 Joint Coordinated System Plan Participants New England New York MISO+MAPP Entergy

7. 7 Why do energy studies Reliability studies show little need for joint RTO transmission expansion. Energy studies show that the Energy Markets may provide economic benefits that could support transmission expansion. Wind is 85% an energy only resource and 15% capacity resource. Wind transmission evaluation

8. 8 Why wind studies MISO has 10 times more potential than it will need under a 20% wind scenario Identify transmission for wind mandates Reduce the cost to customers Economic development for the region Sell wind Renewable Energy Certificates to the east coast utilities that do not have wind plus available energy Improve reliable operation of base load units

9. 9

10. 10 Potential Market RPS little wind High prices Potential Generation

11. 11 40 Meter wind 100 Meter wind Orange is best, white worst

12. 12 MISO 15,000 Mw 2025 Total EI 65,000 Mw 2025

13. 13

14. 14 Congestion Congestion is due to the inefficient use of generation due to transmission limitations Higher cost generators are run when lower cost generation cannot be delivered to an area Considerable improvement in Wisconsin since the start of the Energy Market due to ATC adding transmission.

15. 15

16. 16 Map-2: MISO West Region

17. 17 Transmission Expansion for Renewable Future year 2021 Black dotted - 800 kV HVDC Blue dotted - 765 kV AC Yellow dotted - 345 kV AC

18. 18 Generation Difference: Full Copper Sheet and Full Constrained Cases Positive: Generation Increase Negative: Generation Decrease

19. 19 6,400 MW 3,000 MW Remaining Transmission Capacity to Achieve Potential

20. 20 Lowest cost options 600 1200 Mw 1300 mw 2600 5400 5300 6400 Target typical planned loading Mw, use economics to choose voltage

21. 21 Full Constrained Case Annual Load Weighted LMP

22. 22 Full Constrained Case with Annual Gen Weighted LMP

23. 23

24. 24 Benefit/cost 1.10 for the 20% case- $600M/yr( 2021$) after paying for the lines Line cost proposed to be covered by LMP market for transmission similar to losses today 1.18 for the mandate case

25. 25 Summary The Midwest ISO has ongoing studies of which the Renewable 20% Wind Energy Future is one option. The Western Sub-regional Planning Meeting studies are to determine the midrange transmission to deliver wind to the loads. Transmission to high cost areas may be able to pay for itself through energy sales with the present wind mandates and for a 20% energy mandate Transmission expansion for wind based on the energy markets benefits within MISO is very limited.

26. 26 Questions? Dale Osborn dosborn@midwestiso.org Phone 651-632-8471