1 / 43

Ontario Transmission System

Ontario Transmission System. Presentation to F&ASC April 16, 2003. Ontario Transmission System - Highlights. Nine major internal interfaces Ten transmission zones Eight interconnection points with Manitoba, Minnesota, Quebec, Michigan & New York

ross-ross
Download Presentation

Ontario Transmission System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ontario Transmission System Presentation to F&ASC April 16, 2003

  2. 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

  3. Map of Ontario

  4. Ontario Transmission System Manitoba Minnesota Michigan NY St. Lawrence NW NE Quebec EWTW / EWTE Quebec future HVDC FN / FS Bruce Essa Ottawa FABC Quebec CLAN / CLAS BLIP / NBLIP FIO West SW Toronto East Quebec FETT Niagara QFW NY Niagara Lake Erie future HVDC

  5. 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.

  6. 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)

  7. 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

  8. Interface Base Limits

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. TEC Interface • Boundary between the Toronto and East zones • No pre-defined limit

  17. 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

  18. Snapshot Flows Jan. 23, 2003 @ approx. 18:00 hrs Manitoba Minnesota Michigan NY St. Lawrence NW NE Quebec 240 MW Quebec future HVDC 615 MW Bruce Essa Ottawa 3120 MW Quebec 650 MW 215 MW 1470 MW West SW Toronto East 325 MW Quebec 2925 MW Niagara NY Niagara 1010 MW Lake Erie future HVDC

  19. Snapshot Flows Jan. 23, 2003 @ approx. 3:30 hrs Manitoba Minnesota Michigan NY St. Lawrence NW NE Quebec 50 MW Quebec future HVDC 935 MW Bruce Essa Ottawa 3115 MW Quebec 1910 MW 255 MW 1245 MW West SW Toronto East 1775 MW Quebec 3165 MW Niagara NY Niagara 315 MW Lake Erie future HVDC

  20. Ontario Transmission System Manitoba Minnesota Michigan NY St. Lawrence NW NE Quebec EWTW / EWTE Quebec future HVDC FN / FS Bruce Essa Ottawa FABC Quebec CLAN / CLAS BLIP / NBLIP FIO West SW Toronto East Quebec FETT Niagara QFW NY Niagara Lake Erie future HVDC

  21. 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

  22. 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)

  23. 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

  24. 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

  25. Interconnection Base Limits

  26. 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

  27. 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

  28. 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

  29. Ontario-New YorkSt. Lawrence Interconnection • PAR controlled • Imports & exports are constrained by thermal limitations • Limit - imports 400 MW; exports 400 MW

  30. 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

  31. 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

  32. 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

  33. 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

  34. 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

  35. 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

  36. NY - MichiganScheduled 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

  37. 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

  38. Ontario Coincident Import/Export Capability - Range

  39. Ontario Coincident Import/Export Capability - Example 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)

  40. 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

  41. 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

  42. Example - SSR Report for April 11, 2003 FETT Base limit=5,700MW; Limit=5,700-150-350=5,200MW

  43. End

More Related