Historical Hydro-Quebec Phase II Flow and Transfer Capability Limit Data Peter Wong, ISO New England...

Historical Hydro-Quebec Phase II Flow and Transfer Capability Limit Data

Peter Wong, ISO New EnglandPower Supply Planning Committee MeetingJune 4, 2007

Agenda Item 1.1.2

PSPC Meeting 229

June 4, 2007

Hydro-Quebec Phase II Flow and Transfer Capability Limit Data

© 2007 ISO New England Inc. 2

Historical data presented at the April 19, 2007 PSPC meeting



Historical HQ Phase II Total Transfer Capability and Energy Flows

ISO investigated historical Phase II Total Transfer Capability and energy flows during the January 2003 through August 2006 period.

Results show that when loads are at 24,000 MW or above:– The Total Transfer Capability was equal to or greater than 1,400 MW

approximately 85% of the time.

– There is some uncertainty with the historical Total Transfer Capability data because the default TTC is set at 2,000 MW and it is not adjusted by the operator if the expected energy flow on the HQ Phase II is low. For example, if the TTC shows a 2,000 MW value and the scheduled energy flow is 200 MW, then the operator does not check the actual limits and as a result, the TTC is not updated to reflect the actual limit.

– These data are consistent with actual flow data, as energy imports from the HQ Phase II tie were seldom higher than 1,400 MW, especially at high loads.



Historical HQ Phase II Energy TTCJanuary 2003 through August 2006 HQ Phase II Total Transfer Capability

TTC vs. Demand

-

500

1,000

1,500

2,000

2,500

24,000 24,500 25,000 25,500 26,000 26,500 27,000 27,500 28,000 28,500

Hourly Demand (MW)

TT

C (

MW

)



Historical HQ Phase II Energy TTCJanuary 2003 through August 2006 HQ Phase II Total Transfer Capability

TTC (MW) Count % of TTC % Cumulativ

e

750 3 1.6 1.6

1000 9 4.7 6.3

1100 4 2.1 8.3

1200 6 3.1 11.5

1300 6 3.1 14.6

1400 45 23.4 38.0

1900 33 17.2 55.2

2000 86 44.8 100.0



Historical HQ Phase II Energy Flows

January 2003 through August 2006 Energy Flow vs. NE Hourly Load

-

100

200

300

400

500

600

700

800

900

1,000

1,100

1,200

1,300

1,400

1,500

1,600

1,700

1,800

1,900

20,000 21,000 22,000 23,000 24,000 25,000 26,000 27,000 28,000 29,000

Hourly Load (MW)

Imp

ort

s (

MW

)



Graphs presented at the May 17, 2007 PSPC meeting



Hydro-Quebec Phase II TTC and FlowAll Hours

All Hours TTC and Imports

(2,000)

(1,800)

(1,600)

(1,400)

(1,200)

(1,000)

(800)

(600)

(400)

(200)

-

- 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200

TTC In

Imp

ort

s F

low

ed

Summer On-PeakOn-Peak

Winter On-PeakAll Hours



Hydro-Quebec Phase II TTC and FlowSummer On-Peak Hours

Summer On-Peak Hours TTC and Imports

(2,000)

(1,800)

(1,600)

(1,400)

(1,200)

(1,000)

(800)

(600)

(400)

(200)

-

- 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 2,200

TTC In

Imp

ort

s F

low

ed

Summer On-PeakOn-Peak

Winter On-PeakAll Hours



Additional Graphs and data as you have requested at the May 17, 2007 PSPC meeting



HQ Phase II Flow and Transfer Capability LimitDuring the 2005-2006 Top Ten Summer Peak Load Days

Hours 10 - 21

0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

18,000 20,000 22,000 24,000 26,000 28,000

MW of Load

MW

of

Imp

ort

/ L

imit

Flow Transfer Capability Limit



HQ Phase II Flow and Transfer Capability LimitDuring the 2004-2006 Top Ten Summer Peak Load Days

at Hour of Daily Peak

0

200

400

600

800

1,000

1,200

1,400

1,600

1,800

20,000 21,000 22,000 23,000 24,000 25,000 26,000 27,000 28,000 29,000

MW of Load

MW

of

Imp

ort

/ L

imit

Flow Transfer Capability Limit

Limit Data Not Available in 2004



Hydro-Quebec Phase II Flow and Transfer Capability Limit2005-2006 Top Ten Summer Daily Peak Load Days at Hour of Peak

Date Peak HourPeak Load

(MW)Import (MW)

Transfer Capability

Limit (MW)

6/13/2005 17 25,231 1,254 1,4007/19/2005 15 26,736 1,196 1,4007/20/2005 17 24,983 1,241 1,4007/22/2005 16 24,912 1,242 1,4007/26/2005 17 25,555 1,245 1,4007/27/2005 15 26,885 1,308 1,4008/3/2005 16 24,716 1,339 1,4008/5/2005 15 25,983 1,292 1,400

8/10/2005 16 24,738 1,260 1,4008/11/2005 16 25,282 1,270 1,4006/19/2006 14 24,070 1,360 1,4007/14/2006 17 23,939 1,486 1,5947/17/2006 17 26,721 1,370 1,4007/18/2006 15 27,329 1,378 1,4007/26/2006 17 24,322 1,368 1,4507/27/2006 16 25,318 1,188 1,4007/28/2006 15 25,349 1,362 1,4008/1/2006 17 27,467 1,369 1,4008/2/2006 15 28,130 1,367 1,4008/3/2006 14 27,118 1,362 1,400



Questions &

Comments ?

Historical Hydro-Quebec Phase II Flow and Transfer Capability Limit Data Peter Wong, ISO New England...

Documents

Transcript of Historical Hydro-Quebec Phase II Flow and Transfer Capability Limit Data Peter Wong, ISO New England...