Transcript No Slide Title

Ontario Transmission System
Presentation to F&ASC
April 16, 2003
Public
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Ontario Transmission System
- Highlights
• Nine major internal interfaces
• Ten transmission zones
• Eight interconnection points with Manitoba,
Minnesota, Quebec, Michigan & New York
• Generally, several transmission networks at 500 kV,
230 kV and 115 kV voltage levels
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Map of Ontario
ONTARIO
MAJOR 500kV & 230kV
LINE ROUTES & STATIONS
James Bay
Moose River
MANITOB
A
Abitibi River
PINARD
Mattagami River
Red Lake
Trout Lake
Lake St. Joseph
Albany River
Lac Seul
KENORA
Sioux Lookout
DRYDEN
Lake of
the Woods
Lake
Nipigon
KAPUSKASING
Geralston
160km
ANSONVILLE
Rainy River
MACKENZIE
FORT
FRANCES
KIDD CREEK
METSITE
PORCUPINE
Timmins
Manitouwadge
LAKEHEAD
MARATHON
Lake
Superior
THUNDER BAY
MINNESOTA
To The WEST ZONE (See box)
CANADA
WAWA
WAWA
UNITED STATES
DYMOND
Lake Timiskaming
Lake
Superior
QUEBEC
Sault Ste. Marie
HANMER
MARTINDALE
WIDDIFIELD
MISSISSAGI
Sudbury
ALGOMA
Lake Nipissing North Bay
Ottawa River
LONGUEUIL
TO QUEBEC
Ottawa
ST ISIDORE
HAWTHORNE
PARRY SOUND
Georgian Bay
MERIVALE
ST LAWRENCE
MUSKOKA
SMITH FALLS
MINDEN
L
St
Lake Huron
HINCHINBROOKE
re
aw
eR
nc
er
iv
BROCKVILLE
OWEN SOUND
Lake Simcoe
DOBBIN
ESSA
Barrie
CATARAQUI
Peterborough
HANOVER
BELLEVILLE
Kingston
LENNOX (F)
CHERRYWOOD
Toronto
ORANGEVILLE
CANADA
CLAIREVILLE
RICHVIEW
Kitchener
SEAFORTH
DETWEILER
MICHIGAN
LEASIDE
Lake Ontario
MILTON
UNITED STATES
TRAFALGAR
BURLINGTON
Hamilton
BEACH
MIDDLEPORT
London
Sarnia
SCOTT
CHATHAM
LAUZON
Windsor
Niagara Falls
LONGWOOD
BUCHANAN
CANADA
Lake Erie
NEW YORK
UNITED STATES
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Ontario Transmission System
Manitoba
NW
NE
Quebec
EWTW /
EWTE
FN /
FS
Minnesota
Quebec
future HVDC
Bruce
FABC
Essa
Ottawa
Quebec
CLAN /
CLAS
BLIP /
NBLIP
West
SW
Michigan
Toronto
Niagara
East
Quebec
FETT
QFW
FIO
NY
Niagara
NY
St. Lawrence
Lake Erie
future HVDC
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Definition of
Interface/Interconnection
• Interface and Interconnection definitions are formed
by grouping one or more circuits (lines) for the purpose
of measuring their combined flow at specific points and
enforcing a power flow limit in MW.
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Major Interfaces
• East-West (EW) - EW Transfer East(EWTE) & EW
Transfer West (EWTW)
• Flow North (FN)/Flow South (FS)
• Claireville North (CLAN)/Claireville South (CLAS)
• Flow Away from Bruce Complex (FABC)
• Buchanan Longwood Input (BLIP)/Negative BLIP
(NBLIP)
• Queenston Flow West (QFW)
• Flow East Towards Toronto (FETT)
• Transfer East from Cherrywood (TEC)
• Flow Into Ottawa (FIO)
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Interface Limit Characteristics
•
•
•
•
•
•
‘Base’ limit
All transmission facilities are in-service
Directional
Certain outages result in a penalty in MW
Respect thermal limitations
Preserve system and/or plant stability and maintain
acceptable post-contingency voltage
• Some limits simple constants; others more complex
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Interface Base Limits
Interface
BLIP
NBLIP
QFW
FABC
FETT
CLAN
CLAS
FIO
FN
FS
EWTE
EWTW
Operating Security Limits (MW)
3,500
1,500
1,750 Summer, 1,950 Winter
4,050-4,450 with four Bruce B units in-service*
4,440-4,950 with five Bruce units in-service*
4,500-5,300 with six 500 kV Bruce units in-service*
5,700**
2,000
1,000
1,900
1,900
1,400
325
350
Summer Limits apply from May 1 to October 31. Winter Limits apply from November 1 to April 30.
(*) Limit varies to according BLIP/NBLIP flow.
Published limit range based on the most restrictive contigency.
(**) If the summer Ontario demand exceeds 21,400 MW the limit is penalized by (OD-21400)/3 MW
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EWTE/EWTW Interface
• Boundary between the NW and NE zones
• Power flows related to power flows with Manitoba &
Minnesota
• EWTE limit - 325 MW - preserve system stability
• EWTW limit - 350 MW - preserve system stability &
maintain acceptable pre-contingency voltages
• Power flows from NW to NE
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FN/FS Interface
• Boundary between the NE and Essa zones
• FN limit - 1,900 MW - maintain acceptable postcontingency voltages
• FS limit - 1,400 MW - preserve plant stability
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CLAN/CLAS Interface
•
•
•
•
Boundary between the Essa and Toronto zones
CLAN limit - 2,000 MW
CLAS limit - 1,000 MW
Limits define boundary conditions for other system
limits
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FABC Interface
• Boundary between the Bruce zone and the West and
Southwest zones
• Flows are out
• FABC limit - 4,050-4,450 MW 4 units; 4,440-4,950 MW
5 units; 4,500-5,300 MW 6 units
• Preserve system and/or plant stability & maintain
acceptable post-contingency voltages
• Limit improvement with generation rejection
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BLIP/NBLIP Interface
• Boundary between the West zone and the Bruce and
Southwest zones
• BLIP limit - 3,500 MW - preserve system and/or plant
stability & maintain acceptable pre-contingency and
post-contingency voltages
• NBLIP limit - 1,500 MW - maintain acceptable postcontingency voltages
• NBLIP limit dependent on Bruce, Lambton &
Nanticoke and reactor switching availability
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QFW Interface
• Boundary between the Niagara and SW zones
• QFW limit - 1,750 MW Summer; 1,950 MW Winter respect thermal limitations
• Real-time, limit determined by ambient weather
conditions
• No limit for flows opposite to QFW direction
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FETT Interface
• Boundary between the SW zone and the Essa and
Toronto zones
• FETT Limit - 5,700 MW - preserve system and/or plant
stability & maintain acceptable voltages
• Limit dependent on Nanticoke, Lakeview, Darlington,
Pickering & Lennox plus FS flow
• Summer limit dependent on Ontario Demand
• No limit for flows opposite to FETT direction
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TEC Interface
• Boundary between the Toronto and East zones
• No pre-defined limit
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FIO Interface
• Boundary between the East and Ottawa transmission
zones
• FIO Limit - 1,900 MW - maintain acceptable postcontingency voltages
• Real-time limit improvement with load rejection
• No limit for flows opposite to FIO direction
• Quebec High Voltage Direct Current (HVDC)
interconnection project - limit increase to 3,000 MW
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Snapshot Flows Jan. 23, 2003 @
approx. 18:00 hrs
Manitoba
NW
NE
Quebec
240 MW
615 MW
Minnesota
Quebec
future HVDC
Bruce
3120 MW
Essa
Ottawa
Quebec
650 MW
215 MW
1470 MW
West
SW
Toronto
East
325 MW
Michigan
2925 MW
1010 MW
Niagara
Quebec
NY
Niagara
NY
St. Lawrence
Lake Erie
future HVDC
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Snapshot Flows Jan. 23, 2003 @
approx. 3:30 hrs
Manitoba
NW
NE
Quebec
50 MW
Quebec
935 MW
Minnesota
future HVDC
Bruce
3115 MW
Essa
Ottawa
Quebec
1910 MW
255 MW
1245 MW
West
SW
Toronto
East
1775 MW
Michigan
3165 MW
315 MW
Niagara
Quebec
NY
Niagara
NY
St. Lawrence
Lake Erie
future HVDC
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Ontario Transmission System
Manitoba
NW
NE
Quebec
EWTW /
EWTE
FN /
FS
Minnesota
Quebec
future HVDC
Bruce
FABC
Essa
Ottawa
Quebec
CLAN /
CLAS
BLIP /
NBLIP
West
SW
Michigan
Toronto
Niagara
East
Quebec
FETT
QFW
FIO
NY
Niagara
NY
St. Lawrence
Lake Erie
future HVDC
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Interconnections
• Ontario-Manitoba - Ontario-Manitoba Transfer East
(OMTE) & Ontario-Manitoba Transfer West (OMTW)
• Ontario-Minnesota - Minnesota Power Flow North
(MPFN) & Minnesota Power Flow South (MPFS)
• Ontario-Michigan
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Interconnections
(Continued)
• Ontario-New York Niagara & Ontario-New York St
Lawrence
• Ontario-Quebec North & Ontario-Quebec South
• Quebec & Lake Erie HVDCs (future installations)
• Most of Ontario’s non-radial interconnections are under
phase angle regulator (PAR) control, except for New York
Niagara and part of Michigan (today)
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Interconnection Limit
Characteristics
•
•
•
•
•
‘Base’ limit
All transmission facilities are in-service
Directional
Certain outages result in a penalty in MW
Manitoba & Minnesota - PAR deadband margins
recognized in limits
• Quebec - summer and winter limits
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Interconnection Limit
Characteristics (Continued)
• Michigan & New York - range of summer and winter
flow limits
• Respect thermal and/or stability limitations
• Real-time, thermal limitations determined by ambient
weather conditions
• Ontario coincident import/export capability - many
factors
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Interconnection Base Limits
Limit - Flows Out of Ontario
MW
Limit - Flows Into Ontario
MW
275
324
Minnesota
New York St. Lawrence
140
90
400
400
Quebec North – Summer*
95(5)
740
65
1,385
Interconnection
Manitoba
(3)
Quebec South (East and Ottawa) - Summer*
New York Niagara (60 Hz and 25 Hz) – Summer*
Michigan – Summer*
(1)
(2,3)
Quebec North – Winter*
Quebec South (East and Ottawa) - Winter*
New York Niagara (60 Hz and 25 Hz) – Winter*
(1)
Michigan – Winter*(2,3)
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700-1,800
1,000-1,300
1,700-2,100
700-1,700
110(4)
760
84
1,385
1,000-2,000
1,200-1,500
1,800-2,200
1,200-1,700
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Ontario-Manitoba &
Ontario-Minnesota
Interconnections
• PAR controlled
• Imports & exports constrained by stability and thermal
limitations
• OMTW limit - 275 MW; OMTE limit - 275 MW; SK1
115kV limit - 49MW
• MPFN limit - 90 MW; MPFS limit - 140 MW
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Ontario-Quebec North
Interconnection
•
•
•
•
Radial connection
Imports & exports are constrained thermal limitations
Summer limits - imports 65 MW; exports 95 MW
Winter limits - imports 84 MW; exports 110 MW
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Ontario-Quebec South
Interconnection
• Radial connection
• Imports are constrained by stability limitations and
available Quebec generation
• Exports are constrained by stability and thermal
limitations
• Summer limits - imports 1,385 MW; exports 740 MW
• Winter limits - imports 1,385 MW; exports 760 MW
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Ontario-New York
St. Lawrence Interconnection
• PAR controlled
• Imports & exports are constrained by thermal
limitations
• Limit - imports 400 MW; exports 400 MW
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Ontario-New York Niagara
Interconnection
• Free flowing
• Imports & exports are comprised of scheduled flows
plus unscheduled parallel path flows
• A range of flow limits for different weather and
generation dispatch conditions
• Lower flow limit - unfavourable operating conditions;
constrained by thermal limitations
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Ontario-New York Niagara
Interconnection (Continued)
• Higher flow limit - favourable operating conditions;
constrained by thermal limitations
• Generally, import capability never fully utilized
• Summer limits - imports 1,000-1,300 MW; exports 7001,800 MW
• Winter limits - imports 1,200-1,500 MW; exports 1,0002,000 MW
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Ontario-Michigan Interconnection
• Partial PAR control & free flowing (today)
• Imports & exports are comprised of scheduled flows
plus unscheduled parallel path flows
• Full PAR control (Summer 2003)
• Imports & exports are expected to more closely match
scheduled flows
• Partial vs. full PAR control does not materially change
the flow limits
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Ontario-Michigan Interconnection
(Continued)
• A range of flow limits for different operating conditions
• Exports - lower flow limit - no generation rejection is
armed at Lambton
• Imports - higher flow limit - low generation levels at
Lambton and TransAlta - Sarnia
• Summer limits - imports 700-1,700 MW; exports 1,7002,100 MW
• Winter limits - imports 1,200-1,700 MW; exports 1,8002,200 MW
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Unscheduled Power Flow Michigan-Ontario-New York
• Lake Erie Circulation (LEC) is an unscheduled parallel
path flow involving Michigan, Ontario & New York
• Occurs naturally
• Circulates through Ontario in a clockwise or
counterclockwise direction
• Aggravates the BLIP and QFW interfaces
• Utilization of full PAR control at Michigan will control
LEC in either direction to levels less than 600 MW
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Scheduled Power Flow - MichiganOntario-New York
• With partial PAR control at Michigan (MI), scheduled
power flows across the MI and New York (NY) Niagara
interconnections depend on system conditions
• When full PAR at MI is utilized, scheduled power flows
with MI are more likely to be regulated across the MI
interconnection
• This will alleviate unscheduled flows on the NY
Niagara interconnection and in turn, allow scheduled
flows with New York to be maintained
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NY - Michigan
Scheduled import example with partial
PAR control
Michigan flow = 0.7 Michigan schedule + 0.35 NY schedule
NY flow
= 0.3 Michigan schedule + 0.65 NY schedule
Beck Generation = 1800
Niagara load = 800
QFW pre-load = 1000
QFW limit = 1750
permissible inflow on NY interface = 750
Michigan Import Limit = 1700
Michigan Import Schedule = 1700
Michigan flow into Ontario = 1190+129
= 1319
Michigan contribution on NY = 510
NY max additional import flow = 750 - 510 = 240
NY max schedule = 240 / 0.65 = 369
NY contribution on Michigan = 129
NY flow = 750
Import from NY & Michigan = 1700 + 369 = 2069
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Ontario Coincident Import/Export
Capability
• With partial PAR control at MI, the coincident
import/export capability is unlikely to equal the
arithmetic sum of the individual flow limits
• When full PAR control is utilized, the coincident
import/export capability could equal the arithmetic
sum of the individual flow limits
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Ontario Coincident Import/Export
Capability - Range
Phase-shifter control of the
Michigan Interconnection
Limit - Flows Out of Ontario
MW
Limit - Flows Into Ontario
MW
Partial - Summer
2,350-5,550
2,964-5,264
Partial - Winter
2,685-5,885
3,483-5,483
Full - Summer
4,050-5,550
3,964-5,264
Full - Winter
4,485-5,885
4,683-5,483
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Ontario Coincident Import/Export
Capability - Example
Phase-shifter control of the
Michigan Interconnection
Partial - Summer
Full - Summer
Limit - Flows Into Ontario
MW
2,964-5,264
3,964-5,264
2,964 MW=324(MB)+90(MN)+400(NY St. Lawrence)
+65(QC North)+1,385(QC South)+700(min. MI only)
3,964 MW=324+90+400+65+1,385+700(min. MI)
+1,000 (min. NY Niagara)
5,264 MW=324+90+400+65+1,385+1,700(max. MI)
+1,300 (max. NY Niagara)
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Ontario Coincident Import
Capability
• Higher value in ranges achieved with low generation
dispatch levels
• Generation levels rarely, if ever, materialize
• Expected Ontario coincident import capability is
approximately 4,000 MW
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IMO Reports on Transmission
Capacity
• Interface and interconnections limitations are identified
in the IMO Security Status Report (SSR), Security and
Adequacy Assessment Report (SAA) and 18-Month
Outlook
• Different time periods covered
• Limitations identified as a penalty in MW
• Penalty is applied against the ‘base’ limit
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Example - SSR Report for
April 11, 2003
Transmission Interfaces
System Advisory/Summary Hourly Details H1-12 Hourly Details H13-24 Transmission Interfaces SAA
Notes
Internal Transmission Interface Limitations
Penalty
Date/Time
Facility
Applied
Issued
Positive BLIP 2003/04/08
500
Positive Buchanan
15:08
Longwood Input
Negative BLIP 2003/04/08
500
Negative Buchanan
15:08
Longwood Input
TEM - Transfer East
2003/04/01
75
of Mackenzie
14:42
EWTE - East-West
2003/04/01
50
Transfer East
14:42
FETT - Flow East To
2003/04/04
150
Toronto
14:51
FETT - Flow East To
2003/04/01
350
Toronto
16:13
Start
Date/Time
End
Date/Time
Comments
2003/04/06
17:00
2003/04/12
11:00
C21J O/S
2003/04/06
17:00
2003/04/12
11:00
C21J O/S
2003/04/07
07:00
2003/04/07
07:00
2003/04/10
13:00
2003/04/11
05:00
2003/04/11
06:00
2003/04/11
06:00
2003/04/11
05:00
2003/04/11
18:00
K6F + X27A O/S
K6F+X27A O/S
Claireville T13 O/S
Claireville T13 + C12R +
Richview Terminal O/S
FETT Base limit=5,700MW; Limit=5,700-150-350=5,200MW
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End
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