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AESO Export Capability Workshop
February 16, 2006
Metropolitan Centre, Calgary
AB to BC Transfer BCTC perspective
Calgary, Alberta - Feb 16, 2006
Feb. 16, 2006 Page 3
The BC Transmission System
Snapshot:• 18,000 km circuit transmission
lines• 287 switching, distribution and
capacitor stations• Control Centers
• 1 System Control Center• 4 Area Control Centers
• 244 microwave and repeater sites
• Transmission rights-of-way• Interconnected to Alberta and
the Pacific Northwest for over three decades
Feb. 16, 2006 Page 5
BCTC Bulk Transmission System Overview (export to US)
NICSEL
KLY
REV
WSN
MCA
CBK
ACK
VAS
GMS/PCN
LM & VI
SEL area gen
5L925L94
5L91
5L965L98
5L81 & 5L82
5L51 & 5L52
5L875L76 & 5L79
2L112
BPA
Feb. 16, 2006 Page 6
BCTC Bulk Transmission System Overview(import from US)
NICSEL
KLY
REV
WSN
MCA
CBK
ACK
VAS
GMS/PCN
LM & VI
SEL area gen
5L925L94
5L91
5L965L98
5L81 & 5L82
5L51 & 5L52
5L875L76 & 5L79
2L112
BPA
Feb. 16, 2006 Page 7
Transmission Line Forced Outage (3 pole) Approx Data
Notes:1. SPR provided
in late 2002
2. SPR provided in mid 2003
3. SPR to be provided in 2006
4. SPR provided in 2005
5. Include sequential ctgs in less than 5 minutes
6. * SPR provided
500kV LinesCircuit Length
(km)3 Phase forced
outages Data Years
Forced outage per
year
5L76 (note 1 ) 118 65 22 2.98
5L79 (note 2) 118 70 21 3.35
5L81 * 264 55 22 2.52
5L82 * 248 62 22 2.84
5L91 (note 3) 223 181 22 8.29
5L92 * 180 62 22 2.84
5L94 * 319 146 20 7.30
5L98 (note 4) 302 381 22 17.45
5L51 & 5L52 36 / 36 1 22 0.05
5L91 & 5L98 3 (note 5) 22 0.14
5L76 & 5L79 4 22 0.18
5L81 & 5L82 3 22 0.14
5L1/2/3/4/7 double contingencies approx 278 14 22 0.64
5L11/12/13 double contingencies approx 330 12 22 0.55
Feb. 16, 2006 Page 8
BCTC RAS
• RAS arms generation shedding, line tripping, reactive equipment switching, and calculates transfer limits
• RAS armed in real time dynamically
• RAS arming based on actual flows
• TSA runs every 4 minutes
• TSA arms RAS
• RAS armed automatically
Feb. 16, 2006 Page 9
Feb. 16, 2006 Page 10
Questions?