X hits on this document

822 views

0 shares

0 downloads

0 comments

173 / 179

2009 State of the Market Report

External Transactions

Figure 91 shows hourly real-time net imports across the Canadian interfaces. The Midwest ISO exchanges power with Canada through interfaces with MHEB (left panel) and the IESO (right panel). The Midwest ISO is typically a net importer from MHEB through the 500 kV Forbes- Dorsey line, which is the single largest contingency in the footprint. Net imports from MHEB are generally higher in the peak hours (averaging 960 MW) and lower in the off-peak hours (averaging 712 MW). Average hourly imports from MHEB were 200 MW lower in 2009 than they were in 2008.

Figure 91: Hourly Average Real-Time Imports from Canada 2008 – 2009

2,000

1,500

Net Imports (MW)

1,000

500

0

MHEB

ONT

2008

2008

  • -

    500

  • -

    1,000

1

3

5

7

9

9

11 13 15 17 19 21 23

7

11 13 15 17 19 21 23 1 3 Hour Ending

5

Conversely, the Midwest ISO is on the whole a net exporter to IESO, although the direction of the flows changes periodically. Exports to IESO are generally lower during peak and ramping hours. The wide standard deviation, which averaged 636 MW in 2009, shows the Midwest ISO is an importer from IESO during many hours (particularly peak hours). Average hourly exports to IESO were approximately 300 MW less in 2009 than in 2008.

Page 140

Document info
Document views822
Page views822
Page last viewedThu Jan 19 13:37:44 UTC 2017
Pages179
Paragraphs5369
Words52656

Comments