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					Ontario Transmission System



    Presentation to F&ASC
        April 16, 2003


          Public              1
 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




                      Public                            2
Map of Ontario
                                                                                                                James Bay
ONTARIO                                                                                    Moose River


MAJOR 500kV & 230kV
LINE ROUTES & STATIONS
                                                                          Abitibi River




                                                                                                      A
                                                                                              MANITOB
                                                                                                                         Red Lake     Trout Lake


                                                                                                                                                                   Lake St. Joseph                                  Albany River
                                                                                                                                             Lac Seul
                                                                         PINARD

                                                                                                                   KENORA                          Sioux Lookout
                                                   Mattagami River
                                                                                                                                      DRYDEN
                                                                                                                          Lake of
                                                                                                                        the Woods
                                                                                                                                                                                                Lake
                                               KAPUSKASING                                                                                                                                      Nipigon
                                                                                                                                                                                                                       Geralston
             160km
                                                                                ANSONVILLE                Rainy River
                                                                                                                            FORT                        MACKENZIE                                                                  Manitouwadge
                                                                                                                            FRANCES
                                                                                   KIDD CREEK                                                                                        LAKEHEAD
                                                                                   METSITE                                                                                                                                          MARATHON
                                                                Timmins        PORCUPINE

                                                                                                                                                                         THUNDER BAY                         Lake
                                                                                                                                                                                                            Superior
To The WEST ZONE (See box)                                                                           MINNESOTA                                                                                                   CANADA
             WAWA                                                                                                                                                                                                                                          WAWA
                                                                                                                                                                                       UNITED STATES


                                                                                                         DYMOND

                                                                                                                    Lake Timiskaming
 Lake
Superior
                                                                                                                                                                                          QUEBEC

             Sault Ste. Marie                                                         HANMER
                                                                     MARTINDALE
                                  MISSISSAGI                                                             WIDDIFIELD

                                          ALGOMA                               Sudbury
                                                                                                   Lake Nipissing North Bay




                                                                                                                                                                                                                             Ottawa River
                                                                                                                                                                                                           TO QUEBEC                                  LONGUEUIL

                                                                                                                                                                                                           Ottawa                   ST ISIDORE
                                                                                                                                                                                                                     HAWTHORNE
                                                                                                           PARRY SOUND
                                                                             Georgian Bay                                   MUSKOKA
                                                                                                                                                                                                              MERIVALE
                                                                                                                                                                                                                 ST LAWRENCE

                                                                                                                                                                                                                                                 er
                                                                                                                                           MINDEN                                           SMITH FALLS                                        iv
                                                                                                                                                                                                                                          eR
                                                                                                                                                                                                                                        nc
                                                                                                                                                                                                                                   re
                                                                                                                                                                                                                             L   aw
                                           Lake Huron                                                                                                                                                                     St
                                                                                                                                                                         HINCHINBROOKE
                                                                                                                                                                                                                 BROCKVILLE
                                                                                    OWEN SOUND
                                                                                                                  Lake Simcoe
                                                                                                    ESSA                                DOBBIN                                 CATARAQUI        Kingston
                                                                                                              Barrie                                 Peterborough
                                                                                HANOVER
                                                                                                                                                                                          LENNOX (F)
                                                                                                                                                                    BELLEVILLE
                                                                                                                        CHERRYWOOD

                                                                                                                    Toronto
                                                                                ORANGEVILLE
                                                                                                  CLAIREVILLE                                                               CANADA
                                                                                                    RICHVIEW
                                                                                                                            LEASIDE                     Lake Ontario
                                                                       SEAFORTH  Kitchener       MILTON
                                                                                                                                                                   UNITED STATES
MICHIGAN                                                                      DETWEILER
                                                                                              BURLINGTON
                                                                                                                TRAFALGAR

                                                                                                               Hamilton
                                                                                                              BEACH
                                                                                          MIDDLEPORT
                                                                      London                                                          Niagara Falls
                                                Sarnia
                                                             LONGWOOD
                                               SCOTT                           BUCHANAN




                                                                         CANADA
                                   LAUZON
                                                     CHATHAM
                                                                               Lake Erie                                        NEW YORK
                                Windsor
                                                                       UNITED STATES




                                                   Public                                                                                                                                                                                                         3
            Ontario Transmission System
 Manitoba
                      NW                                          NE                 Quebec
                                           EWTW /
                                           EWTE                                        Quebec
Minnesota                                                                 FN /         future HVDC
                                                                          FS
                     Bruce
                                    FABC
                                                                 Essa                   Ottawa

                                                                                                     Quebec
            BLIP /                                                          CLAN /
                                                                            CLAS                     FIO
            NBLIP

                     West                   SW                  Toronto                   East

                                                                                                     Quebec
   Michigan                                           FETT

                                            QFW       Niagara     NY
                                                                  Niagara
                            Lake Erie                                                 NY
                            future HVDC                                               St. Lawrence
                                             Public                                                        4
              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.




                       Public                            5
             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)

                     Public                           6
    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




                      Public                            7
              Interface Base Limits

  Interface        Operating Security Limits (MW)
  BLIP             3,500
  NBLIP            1,500
  QFW              1,750 Summer, 1,950 Winter
  FABC             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*
  FETT             5,700**
  CLAN             2,000
  CLAS             1,000
  FIO              1,900
  FN               1,900
  FS               1,400
  EWTE               325
  EWTW               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




                                          Public                                                 8
       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




                     Public                            9
              FN/FS Interface

• Boundary between the NE and Essa zones
• FN limit - 1,900 MW - maintain acceptable post-
  contingency voltages
• FS limit - 1,400 MW - preserve plant stability




                      Public                        10
           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




                        Public                           11
              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




                     Public                         12
         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 post-
  contingency voltages
• NBLIP limit dependent on Bruce, Lambton &
  Nanticoke and reactor switching availability



                      Public                             13
              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




                    Public                         14
              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




                     Public                         15
               TEC Interface

• Boundary between the Toronto and East zones
• No pre-defined limit




                     Public                     16
                 FIO Interface

• Boundary between the East and Ottawa transmission
  zones
• FIO Limit - 1,900 MW - maintain acceptable post-
  contingency 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




                      Public                             17
       Snapshot Flows Jan. 23, 2003 @
             approx. 18:00 hrs
 Manitoba
                     NW                                          NE                 Quebec
                                        240 MW
                                                                                      Quebec
Minnesota                                                                615 MW       future HVDC


                 Bruce
                                  3120 MW
                                                                Essa                   Ottawa

                                                                                                    Quebec
            215 MW                                                         650 MW
                                                                                                    1470 MW

                 West                    SW                    Toronto                   East
                                                                            325 MW                  Quebec
   Michigan                                          2925 MW

                                                     Niagara     NY
                                        1010 MW
                                                                 Niagara
                          Lake Erie                                                  NY
                          future HVDC                                                St. Lawrence
                                            Public                                                      18
       Snapshot Flows Jan. 23, 2003 @
             approx. 3:30 hrs
 Manitoba
                     NW                                          NE               Quebec
                                        50 MW
                                                                                      Quebec
Minnesota                                                                935 MW       future HVDC


                 Bruce
                                  3115 MW
                                                                Essa                   Ottawa

                                                                                                    Quebec
            255 MW                                                         1910 MW
                                                                                                    1245 MW

                 West                    SW                    Toronto                   East
                                                                            1775 MW                 Quebec
   Michigan                                          3165 MW

                                                     Niagara     NY
                                        315 MW
                                                                 Niagara
                          Lake Erie                                                  NY
                          future HVDC                                                St. Lawrence
                                            Public                                                      19
            Ontario Transmission System
 Manitoba
                      NW                                          NE                 Quebec
                                           EWTW /
                                           EWTE                                        Quebec
Minnesota                                                                 FN /         future HVDC
                                                                          FS
                     Bruce
                                    FABC
                                                                 Essa                   Ottawa

                                                                                                     Quebec
            BLIP /                                                          CLAN /
                                                                            CLAS                     FIO
            NBLIP

                     West                   SW                  Toronto                   East

                                                                                                     Quebec
   Michigan                                           FETT

                                            QFW       Niagara     NY
                                                                  Niagara
                            Lake Erie                                                 NY
                            future HVDC                                               St. Lawrence
                                             Public                                                        20
             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




                    Public                       21
               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)



                       Public                           22
         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




                    Public                      23
       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




                      Public                             24
   Interconnection Base Limits

                                                       Limit - Flows Out of Ontario   Limit - Flows Into Ontario
Interconnection
                                                                   MW                            MW


Manitoba                                                           275                           324
           (3)
Minnesota                                                          140                           90
New York St. Lawrence                                              400                           400


Quebec North – Summer*                                            95(5)                          65
Quebec South (East and Ottawa) - Summer*                          740                           1,385
                                                 (1)
New York Niagara (60 Hz and 25 Hz) – Summer*                   700-1,800                    1,000-1,300
                     (2,3)
Michigan – Summer*                                             1,700-2,100                   700-1,700


Quebec North – Winter*                                            110(4)                         84
Quebec South (East and Ottawa) - Winter*                           760                          1,385
                                               (1)
New York Niagara (60 Hz and 25 Hz) – Winter*                   1,000-2,000                  1,200-1,500
Michigan – Winter*(2,3)                                        1,800-2,200                  1,200-1,700




                                           Public                                                                  25
           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



                      Public                          26
           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




                        Public                          27
         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



                      Public                             28
         Ontario-New York
    St. Lawrence Interconnection
• PAR controlled
• Imports & exports are constrained by thermal
  limitations
• Limit - imports 400 MW; exports 400 MW




                      Public                     29
      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




                      Public                              30
      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 700-
  1,800 MW
• Winter limits - imports 1,200-1,500 MW; exports 1,000-
  2,000 MW




                      Public                          31
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



                       Public                           32
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 1,700-
  2,100 MW
• Winter limits - imports 1,200-1,700 MW; exports 1,800-
  2,200 MW

                       Public                            33
     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


                       Public                           34
      Scheduled Power Flow -
    Michigan-Ontario-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



                      Public                          35
         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




              Public                                                  36
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




                       Public                           37
Ontario Coincident Import/Export
       Capability - Range


    Phase-shifter control of the     Limit - Flows Out of Ontario   Limit - Flows Into Ontario
    Michigan Interconnection                     MW                            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




                                   Public                                                        38
Ontario Coincident Import/Export
      Capability - Example
Phase-shifter control of the   Limit - Flows Into Ontario
Michigan Interconnection                  MW
Partial - Summer                      2,964-5,264
Full - Summer                         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)



                                           Public           39
      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




                      Public                            40
   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




                     Public                             41
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    Start         End
Facility                                                                 Comments
                     Applied     Issued       Date/Time     Date/Time
Positive BLIP -
                                 2003/04/08   2003/04/06    2003/04/12
Positive Buchanan    500                                                 C21J O/S
                                 15:08        17:00         11:00
Longwood Input
Negative BLIP -
                                 2003/04/08   2003/04/06    2003/04/12
Negative Buchanan    500                                                 C21J O/S
                                 15:08        17:00         11:00
Longwood Input
TEM - Transfer East              2003/04/01   2003/04/07    2003/04/11
                     75                                                  K6F + X27A O/S
of Mackenzie                     14:42        07:00         06:00
EWTE - East-West                 2003/04/01   2003/04/07    2003/04/11
                     50                                                  K6F+X27A O/S
Transfer East                    14:42        07:00         06:00
FETT - Flow East To              2003/04/04   2003/04/10    2003/04/11
                     150                                                 Claireville T13 O/S
Toronto                          14:51        13:00         05:00
FETT - Flow East To              2003/04/01   2003/04/11    2003/04/11   Claireville T13 + C12R +
                     350
Toronto                          16:13        05:00         18:00        Richview Terminal O/S


 FETT Base limit=5,700MW; Limit=5,700-150-350=5,200MW


                                      Public                                                        42
     End




Public     43

				
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