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2009 State of the Market Report

Executive Summary

increase in the forecasted peak load (to 107.6 GW) is entirely due to the additions of new members.

Despite the surplus of capacity that currently exists, more than 3,000 MW of new capacity is scheduled to be added prior to the summer of 2010, 1,600 MW of which is wind. Only 756 MW of generation is scheduled to retire. The rapid development of wind resources in the western portion of the footprint provides substantial environmental benefits, although it also creates forecasting and operational challenges that the Midwest ISO is working to address.

D.

Transmission Congestion

One significant benefit of the Midwest ISO energy markets is accurate and transparent locational price signals that reflect congestion on the network. Figure E-6 below shows the total congestion costs in the day-ahead and real-time markets. Total congestion costs shown in this figure were $305 million in 2009, a decrease of more than 39 percent from 2008 and almost 52 percent from 2007. The decrease was caused by a number of factors, including lower load, lower fuel prices, and transmission upgrades that reduced congestion into WUMS.

$200 M

$150 M

2007 Total

2008 Total

2009 Total

632,878,942

500,251,809

304,522,786

79,777,444

8,823,751

17,875,604

Figure E-6: Day-Ahead and Real-Time Congestion Costs 2007 – 2009

DA Congestion Cost RT Congestion Cost

$100 M

$50 M

$0 M

  • -

    $50 M

J F MAMJ J AS ONDJ F MAMJ J AS ONDJ F MAMJ J AS OND

2007 2008 2009

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