Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2017-09-30

The table below contains the significant transmission outages submitted as tentative to the AESO.
These Outages have not yet necessarily been approved, but are listed for awareness and coordination purposes.
An Outage has been considered significant for this table if it meets any one (1) or more of the following criteria:
  1. it affects a transmission facility operating at two hundred and forty (240) kV or greater;
  2. it affects an intertie;
  3. it affects an element connecting facilities owned by two (2) or more different legal owners of transmission facilities;
  4. it affects an element that connects a generating unit or an aggregated generating facility to the interconnected electric system;
  5. it requires the ISO to issue a dispatch or directive for generation in order to facilitate the planned outage;
  6. it affects a cutplane limit;
  7. it limits or reduces the operability of a synchronous condenser, static VAr compensator, static compensator or other similar dynamic device; or
  8. it affects high voltage direct current facilities.
Note: Where a transmission outage requires generation curtailments, the adjustments to generation will typically happen in the hours before the scheduled transmission outage and in the hour after the element is returned to service.

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Owner From To Duration Element Scheduled Activity Affected Intertie
ATCO 16-Mar-17 16:00 24-Oct-17 16:00 222 Days
Continuous
959S SVC (959s Lanfine) forced outage  
ENMAX 14-Aug-17 12:00 12-Nov-17 16:00 90.21 Days
Continuous
ENMAX 25 B240-D131 (ENMAX 25) SF6 sample, repair SW132 switch  
SUNCOR 21-Aug-17 08:00 06-Oct-17 20:00 46.5 Days
Continuous
29EDD-34 Edd34Sub 5 year PM breakers, bus CT, switches  
ATCO 11-Sep-17 07:00 03-Oct-17 17:00 22.42 Days
Continuous
9L934 (132s Ware Junction - 801s Anderson) protection upgrade  
ALTALINK 11-Sep-17 23:00 27-Oct-17 17:00 45.75 Days
Daily
62s12 (62s Brazeau) maintenance  
CNRL 12-Sep-17 08:00 20-Oct-17 18:00 38.42 Days
Continuous
838s 75-TR-2801 (838s Horizon Mining) removal of old transformer and install of a new transformer  
ALTALINK 14-Sep-17 09:01 16-Oct-17 12:00 32.12 Days
Continuous
929L (63s Red Deer - 74s Janet),287S Hazelwood,63s 2752 (63s Red Deer),63s 2652 (63s Red Deer),74s 352 (74s Janet),74s 252 (74s Janet) build and cut in 929L into Hazelwood and rename to 1082L  
CENOVUS 18-Sep-17 07:00 30-Sep-17 18:00 12.46 Days
Continuous
539s 9201T (539s Sunday Creek) 5 year maintenance  
Syncrude 18-Sep-17 07:00 02-Oct-17 20:00 14.54 Days
Continuous
Aurora T-11,Aurora 14 (Aurora),Aurora 24 (Aurora),Aurora 34 (Aurora) 5 yr PM and replacing 14B, 24B and 34B isolating disconnects  
ALTALINK 18-Sep-17 14:01 30-Nov-17 17:00 73.17 Days
Continuous
69s 713 (69s North Barrhead),69s T4 (69s North Barrhead) replace T4 bushing and maintenance; repairs to 69s23, & 69s713 maintenance  
ATCO 25-Sep-17 08:00 02-Oct-17 17:00 7.38 Days
Continuous
7L90 replace rotten crossarms, 741s radial fed via 7L199  
MONTANA 25-Sep-17 08:00 06-Oct-17 19:00 11.46 Days
Continuous
MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
SUNCOR 25-Sep-17 08:00 13-Oct-17 18:00 18.42 Days
Continuous
29EDD-34 Edd34Sub project 1716 - Suncor Plant 300HV  
ALTALINK 25-Sep-17 09:00 06-Oct-17 17:30 11.35 Days
Continuous
1201L (520s Bennett - BCH Cranbrook) AML annual maintenance & BCH replace CBK 5CVT5 AB-BC
ATCO 25-Sep-17 09:00 27-Oct-17 16:00 32.29 Days
Continuous
9L948,863S 902T,9L27,863S 901T 863S Paint Earth substation - 240KV switch replacement  
CNRL 27-Sep-17 08:00 16-Oct-17 15:00 19.29 Days
Continuous
838S Horizon Mining testing of 260kV VTs and CTs  
ALTALINK 29-Sep-17 07:15 06-Oct-17 16:45 7.4 Days
Continuous
801L (62s - 294s) - GOI Replace structures/insulators, repair guy wires, general maintenance  
ATCO 29-Sep-17 09:00 03-Oct-17 18:00 4.38 Days
Continuous
75-PLH-901 (838s Horizon Mining - 849s Joslyn) Transmission line insulator replacement and maintenance  
EPCOR 30-Sep-17 07:01 06-Oct-17 17:00 6.42 Days
Continuous
CDS25 @ Cloverbar disconnect replacement  
ALTALINK 02-Oct-17 06:30 13-Oct-17 14:30 11.33 Days
Continuous
17s (922L-310p) - GOI 17s6 Breaker Replacement & C60 Relay Replacement  
ALTALINK 02-Oct-17 07:00 04-Oct-17 16:00 2.38 Days
Continuous
28s T1 & 240kv Bus 1 - Advice Replace 1 PT at 28s19 (Like For Like)  
EPCOR 02-Oct-17 07:00 06-Oct-17 17:00 4.42 Days
Continuous
J2405 @ Jasper Maint  
ALTALINK 02-Oct-17 07:30 02-Oct-17 11:30 4 Hours
Daily
32s22 - GOI Warranty heater replc.  
ALTALINK 02-Oct-17 07:30 05-Oct-17 17:30 3.42 Days
Continuous
62s201 (801L) - GOI Replacing 801L "A" protection  
ENMAX 02-Oct-17 08:00 02-Oct-17 16:00 8 Hours
Continuous
162s 240KV Bus. 918L Fall Substation Washing  
ENMAX 02-Oct-17 08:00 02-Oct-17 16:00 8 Hours
Continuous
162s 138KV & 240KV Bus. 162.2TR Fall Substation Washing  
CNRL 02-Oct-17 08:00 04-Oct-17 18:00 2.42 Days
Continuous
75-PLH-903 (838s Horizon Mining - 842s Horizon Upgrading) Transmission line insulator replacement and maintenance  
ATCO 02-Oct-17 08:00 05-Oct-17 17:00 3.38 Days
Continuous
7L701 7L701 Arm Change  
BCH 02-Oct-17 08:00 06-Oct-17 16:00 4.33 Days
Continuous
5L72 (Mica Creek - Nicola) Replace spacers and arcing horns AB-BC
ALTALINK 02-Oct-17 09:30 05-Oct-17 17:30 3.33 Days
Continuous
520s T1(TX18413/18414/18415/18416) - GOI 500kV Surge Arrestor Replacements  
ALTALINK 02-Oct-17 11:00 05-Oct-17 17:00 3.25 Days
Continuous
190L (320p-17s) GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ALTALINK 02-Oct-17 23:15 03-Oct-17 02:45 3.5 Hours
Continuous
693L (42s - C10s) - GOI for HLM high load move  
ALTALINK 03-Oct-17 07:30 10-Oct-17 12:30 7.21 Days
Continuous
268s199N (Affects 199L) GOI Replace 199 line protection  
ENMAX 03-Oct-17 08:00 03-Oct-17 12:00 4 Hours
Continuous
162s 138KV Bus. 162.81L Fall Substation Washing  
ATCO 03-Oct-17 08:00 05-Oct-17 16:00 2.33 Days
Continuous
2029S DC FILTER DCF11 DC filter inspection at 2029S Heathfield

Access filter bay for inspection

Will not be able to open DC filter at Newell
 
ALTALINK 03-Oct-17 08:00 05-Oct-17 18:00 2.42 Days
Continuous
268s IPP Comms Move communications equipment to new building.  
ALTALINK 03-Oct-17 09:00 05-Oct-17 17:00 2.33 Days
Continuous
511s SVCP - GOI SVCP Protection Settings Test Will not impact the link dispatch.  
EPCOR 04-Oct-17 07:00 06-Oct-17 17:00 2.42 Days
Continuous
1208 CT’s @ Genesee Doble  
ATCO 04-Oct-17 08:00 04-Oct-17 15:00 7 Hours
Continuous
959s 901T 959S Lanfine - 901T OOS for Leak Repair  
ENMAX 04-Oct-17 08:00 04-Oct-17 16:00 8 Hours
Continuous
162s 138KV & 240KV Bus. 162.1TR Fall Substation Washing  
ALTALINK 04-Oct-17 09:00 04-Oct-17 11:00 2 Hours
Daily
214s RTU Outage Dickson Dam TPR outage - Install new telecom equipment at 214s Visibility May be lost for 10 minutes.  
ENMAX 05-Oct-17 08:00 08-Oct-17 12:00 3.17 Days
Continuous
162s 240KV Bus. PT-Z41 Fall Substation Washing  
ENMAX 05-Oct-17 08:00 08-Oct-17 21:00 3.54 Days
Continuous
162B240-RB135. 162RB240-RB134. PT Z42. 2-STG-GN-0002 Repair SW143. Doble PT Z42, RB134, Rev CT's (STG). Fall Substation Washing. Parts Required for SW mech.  
ENMAX 05-Oct-17 12:00 05-Oct-17 16:00 4 Hours
Continuous
162s 240KV Bus. PT-Z42 Fall Substation Washing  
ENMAX 05-Oct-17 13:00 08-Oct-17 21:00 3.33 Days
Continuous
162B240-RB131. 162B240-RB132. PT-Z41 SF6 gas sample RB132. Doble PTZ41, Rev Meter CT's, 16B240-RB131. HV SW Maintenance SW132 & SW133. Fall Substation Washing. Piggy back CEC outage on 1-CTG-GN-0001.  
CNRL 06-Oct-17 08:00 07-Oct-17 18:00 1.42 Days
Continuous
75-PLH-902 (838s Horizon Mining - 849s Joslyn) Transmission line insulator replacement and maintenance  
ENMAX 06-Oct-17 12:00 06-Oct-17 16:00 4 Hours
Continuous
50L. 21.2TR. 138KV PT @ Bearspaw. 21 CAP Fall Substation Washing. Origionally scheduled Sept 18th  
EPCOR 07-Oct-17 07:00 07-Oct-17 17:00 10 Hours
Continuous
CC721 @ Cloverbar Maint  
ENMAX 07-Oct-17 12:00 07-Oct-17 16:00 4 Hours
Continuous
162s 240KV Bus. 932L Fall Substation Washing  
EPCOR 09-Oct-17 07:00 13-Oct-17 17:00 4.42 Days
Continuous
C2406 @ Cloverbar Maint  
EPCOR 10-Oct-17 07:00 14-Oct-17 17:00 4.42 Days
Continuous
P2404 BKR @ Petrolia Maint  
ATCO 10-Oct-17 07:00 02-Nov-17 17:00 23.42 Days
Continuous
9L950 Protection upgrade  
ALTALINK 10-Oct-17 07:30 13-Oct-17 17:30 3.42 Days
Continuous
62s202 (202L) - Advice Replace L2 A protection, trip testing from new T3 and T7 protections  
ENMAX 10-Oct-17 08:00 10-Oct-17 12:00 4 Hours
Continuous
833L. 12.2TR. 138KV PT Substation Washing  
ENMAX 10-Oct-17 08:00 10-Oct-17 12:00 4 Hours
Continuous
65B240-D134 SF6 Gas Sample  
ALTALINK 10-Oct-17 08:00 12-Oct-17 17:00 2.38 Days
Continuous
370s 240kV Bus 1 - Advice Replace 370s28 PT  
ATCO 10-Oct-17 08:00 12-Oct-17 17:00 2.38 Days
Continuous
7L701 7L701 Arm Change  
ALTALINK 10-Oct-17 10:00 13-Oct-17 17:00 3.29 Days
Daily
28s (1075L-132s) - Advice Replace 2 PTs at 28s40 (Like for Like)  
ALTALINK 10-Oct-17 11:00 10-Oct-17 15:00 4 Hours
Daily
250p11 (250p Bighorn) maintenance  
ALTALINK 10-Oct-17 11:00 10-Oct-17 17:00 6 Hours
Daily
320p989 Advice Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ENMAX 10-Oct-17 12:00 10-Oct-17 16:00 4 Hours
Continuous
832L. 12.1TR. 138KV PT Substation Washing  
ALTALINK 10-Oct-17 13:00 12-Oct-17 17:00 2.17 Days
Continuous
71s 138kV West Bus & T1 - Advice Replace 71s25 A Phase PT & T1 Leak Repairs  
ALTALINK 11-Oct-17 08:00 11-Oct-17 12:00 4 Hours
Daily
38s17 (s18 Breaker) Advice Trip test for 138kV Bus 3 B87 relay addition  
ENMAX 11-Oct-17 08:00 11-Oct-17 16:00 8 Hours
Continuous
833L. Doble 12B138-833  
ALTALINK 11-Oct-17 09:00 11-Oct-17 13:00 4 Hours
Daily
250p22 (250p Bighorn) maintenance  
ENMAX 12-Oct-17 08:00 12-Oct-17 16:00 8 Hours
Continuous
832L. 12B138-832 Doble 12B138-832  
BCH 12-Oct-17 08:00 13-Oct-17 16:00 1.33 Days
Continuous
5L71 (Mica Creek - Nicola) Kamloops Transmission to replace spacers and arcing horns AB-BC
ENMAX 14-Oct-17 08:00 15-Oct-17 16:00 1.33 Days
Continuous
21.80L. 21.1TR. 20.82L. 21.4TR. TAU CAP VOLT TR TR Bushing/CT replacement. TR DIFF Relay Replacement  
ENMAX 14-Oct-17 12:00 14-Oct-17 16:00 4 Hours
Continuous
21.80L. 20.82L. TAU CAP. 21.1TR. 21.4TR Fall Substation Washing  
ALTALINK 15-Oct-17 07:15 15-Oct-17 17:45 10.5 Hours
Daily
719L (256s - 719L134) - GOI Component Replacements  
ALTALINK 15-Oct-17 08:00 30-Oct-17 17:00 15.38 Days
Continuous
914L (89s-86s) GOI [SWEATD] [SWEATD] Cut 914L in/out of 289s  
ALTALINK 15-Oct-17 08:00 07-Nov-17 17:00 23.42 Days
Daily
910L (89s-288s) GOI [SWEATD] [SWEATD] Cut 910L in/out of new 289s  
ALTALINK 15-Oct-17 21:15 16-Oct-17 00:45 3.5 Hours
Continuous
693L (42s - C10s) - GOI for HLM high load move  
ALTALINK 16-Oct-17 07:00 16-Oct-17 12:00 5 Hours
Daily
17s11 - GOI Required Trip Test for Protection Upgrade & PMU Replacement  
ALBIAN 16-Oct-17 07:00 19-Oct-17 18:00 3.46 Days
Continuous
920s 901T (920s Jackpine) CNRL 901T maint, customer outage will result  
EPCOR 16-Oct-17 07:00 22-Oct-17 17:00 6.42 Days
Continuous
J2406 @ Jasper Maint  
ATCO 16-Oct-17 07:00 29-Oct-17 18:00 13.46 Days
Continuous
840S CONVERTER McNeill 2017 Fall turn around. Site shut down for maint. work. AB-SK
ALTALINK 16-Oct-17 07:30 19-Oct-17 17:30 3.42 Days
Continuous
950L(132s - A801s) - GOI Replacing 'A' & 'B' line protections  
ALTALINK 16-Oct-17 07:30 23-Oct-17 17:30 7.42 Days
Continuous
347s199W (199L) - GOI Replacing 347s199W with a new SF6 breaker and adding LA's to 199L  
ENMAX 16-Oct-17 08:00 20-Oct-17 16:00 4.33 Days
Continuous
11.83L 11s reliability upgrade. Restring line over CP tracks, terminate 11.83L on new structure.  
ALTALINK, Lethbridge 16-Oct-17 08:00 26-Oct-17 16:00 10.33 Days
Continuous
725AL (618s Riverbend - 725L tap),725L (111s Coalbanks - 674s Lethbridge Bowron) relay upgrades  
ENMAX 16-Oct-17 08:00 30-Oct-17 16:00 14.33 Days
Continuous
35.81L(temporary) (SWCRR)-Energization only. New 35.81 settings into 35 Sub. Connect new/permanent 35.81L to 42 S and 35 sub  
BCH 16-Oct-17 09:00 27-Oct-17 17:00 11.33 Days
Continuous
2L293 (Selkirk - Nelway) BCH - annual maintenance - BC maintenance does not affect AB ATC AB-BC
ALTALINK 16-Oct-17 10:00 19-Oct-17 17:00 3.29 Days
Continuous
370s (967L-Open) - Advice Replace 370s17 CVT  
ALTALINK 16-Oct-17 10:00 26-Oct-17 14:00 10.17 Days
Continuous
618s (725L-618s-L674s) - GOI Lethbridge & Altalink Protection Relay Upgrade Both Ends of 725L  
ALTALINK 16-Oct-17 11:00 17-Oct-17 17:00 30 Hours
Continuous
320p1352 GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ALTALINK 16-Oct-17 12:30 16-Oct-17 17:30 5 Hours
Daily
17s7 - GOI Required Trip Test for Protection Upgrade & PMU Replacement  
ALTALINK 16-Oct-17 13:00 19-Oct-17 17:00 3.17 Days
Continuous
71s23 (920L) - Advice Replace 71s23 240kV VTs (Like for Like)  
ALTALINK 17-Oct-17 07:00 17-Oct-17 12:00 5 Hours
Daily
17s1 - GOI Required Trip Test for Protection Upgrade & PMU Replacement  
ATCO 17-Oct-17 07:00 19-Oct-17 17:00 2.42 Days
Daily
7L696 To mitigate some of the areas on 7L79 and 7L696 that really get affected by hoar frost. This mitigation is to install inter phase spacers between A and C phase so that they cannot get close to each other as frost comes off of the wire.  
ATCO 17-Oct-17 07:00 20-Oct-17 17:00 3.42 Days
Continuous
2029S ACF1 ACF1 filter Bank inspection, Inspections required for ACF11, ACF12, ACF13 and ACF14, HVDC Power limit of 750MW, When ACF1 is taken out of service we loose our shunt reactor which will put us in a low voltage mode until power transfer is set somewhere above 300MW. Once above 300MW the voltage will be back to 500KV DC and we will still have ramp capabilities to 750MW.  
ALTALINK 17-Oct-17 07:00 20-Oct-17 17:00 3.42 Days
Continuous
17s (906L-42s) - GOI C60 Relay Replacement for 17s5 & Air Breaker Module replacement  
ALTALINK 17-Oct-17 07:15 20-Oct-17 17:45 3.44 Days
Continuous
906L (42s - 17s) - GOI line clearance mitigation  
ALTALINK 17-Oct-17 12:30 17-Oct-17 17:30 5 Hours
Daily
17s12 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 18-Oct-17 07:00 18-Oct-17 12:00 5 Hours
Daily
17s10 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 18-Oct-17 09:00 18-Oct-17 16:00 7 Hours
Daily
618s725 CT Ratio Change At the request of Op Eng. Techs to change CT ratio from 400:5 to 800:5. Relay setting will not be changed. In conjunction with City Of Leth. and AML outage.  
ALTALINK 18-Oct-17 12:30 18-Oct-17 17:30 5 Hours
Daily
17s5 - GOI Required Trip Test for Protection Upgrade & PMU Upgrade  
ALTALINK 19-Oct-17 07:00 19-Oct-17 12:00 5 Hours
Continuous
17s2852 (T3 TX18814) - GOI Required Trip Test for Protection Upgrade  
ALTALINK 21-Oct-17 09:00 22-Oct-17 18:00 1.38 Days
Daily
58s T2 & 25kV Bus - GOI Replace 25kV Risers Between the New breakers and the 25kV Bus & Install Bird Cover-up  
EPCOR 23-Oct-17 07:00 23-Oct-17 17:00 10 Hours
Continuous
1044L ( Jasper - Petrolia ) Doble  
EPCOR 23-Oct-17 07:00 27-Oct-17 17:00 4.42 Days
Continuous
TX1 @ Castledowns DGA Monitor  
ALTALINK 23-Oct-17 10:45 23-Oct-17 12:15 90 Mins
Daily
214s2047W Open breaker advice Remove TPR module which disables 2047 L protection  
ALTALINK 23-Oct-17 11:30 23-Oct-17 19:00 7.5 Hours
Daily
650s852 GOI 240kV Breaker Maintenance  
ALTALINK 23-Oct-17 12:00 26-Oct-17 18:00 3.25 Days
Continuous
61s T1 and 138kV Bus1 (affect 836L/202L) T1 bushing replacement  
ALTALINK 24-Oct-17 08:00 24-Oct-17 15:00 7 Hours
Daily
310p 240kV 'B' Bus,922L (310p-17s) GOI Replace insulators on 922L exiting structure in 310p  
ALTALINK 24-Oct-17 08:00 25-Oct-17 16:00 1.33 Days
Continuous
648s T3 (Tx18248) GOI Transformer Maintenance  
ALTALINK 24-Oct-17 15:00 02-Nov-17 17:15 9.09 Days
Continuous
922L (17s - 310p) GOI line maintenance  
ALTALINK 25-Oct-17 08:00 25-Oct-17 12:00 4 Hours
Daily
38s17 (18 Breaker) Advice Trip test for 138kV Bus 2 B87 relay addition  
ALTALINK 27-Oct-17 06:00 01-Nov-17 17:00 5.46 Days
Continuous
675L (244s-41s-321s) GOI Cutfree 675L from 41s & Cut in 675L at 321s Al Rothbauer  
ALTALINK 27-Oct-17 07:30 27-Oct-17 14:00 6.5 Hours
Daily
62s207 (T5) - GOI Wiring cutovers and trip tests from new T3 & T7 protections; Re-test block closing scheme on this breaker.  
EPCOR 28-Oct-17 07:00 28-Oct-17 17:00 10 Hours
Continuous
BA2 @ Bellamy Argyl Oil Samples  
ALTALINK 28-Oct-17 08:00 29-Oct-17 17:00 1.38 Days
Continuous
74s37.82W - GOI Maintain 138kV minimum oil breaker S&S HPF  
ALTALINK 30-Oct-17 07:00 10-Nov-17 17:30 11.48 Days
Continuous
17s (1081L - 281s) - GOI 17s6 Breaker C60 Relay Replacement & PMU Replacement & Airbreak Module Replacement  
BCH 30-Oct-17 09:00 03-Nov-17 13:00 4.17 Days
Continuous
2L112 (Nelway - Boundary) gas relay and protection maintenance - BC maintenance does not affect AB ATC AB-BC
ALTALINK 30-Oct-17 11:00 16-Nov-17 14:00 17.17 Days
Continuous
163s1752 - GOI Replace 163s1752 Breaker To New SF6 Type  
ALTALINK 01-Nov-17 07:00 22-Dec-17 17:00 51.46 Days
Continuous
916L (42s-5s) GOI [SWCRR] [SWCRR] 916L to move U/G for a portion, connect new U/G cables at both ends  
ALTALINK 01-Nov-17 07:00 22-Dec-17 17:00 51.46 Days
Continuous
693L (42s-C10s) GOI [SWCRR] [SWCRR] 693L to move U/G for a portion, connect new U/G cables at both ends  
ENMAX 01-Nov-17 08:00 12-Nov-17 16:00 11.38 Days
Continuous
37.82L. 37s & Janet 138KV Bus Differential Protection Line Protection Upgrade  
ALTALINK 02-Nov-17 06:00 10-Nov-17 18:00 8.54 Days
Continuous
880L (523s-321s) GOI create 3 terminal 523s-41s-321s .Terminate 880L from 523s,41s & 321s  
ENMAX 02-Nov-17 08:00 02-Nov-17 16:00 8 Hours
Continuous
693L. 10B138-693L SF6 Gas Sample.  
ATCO 06-Nov-17 07:00 10-Nov-17 17:00 4.42 Days
Continuous
9L97 FS
Switching to isolate 9L97. Isolation points to be 905A, 906A, and 9L97D2 @ 946S Oakland
 
ALTALINK 06-Nov-17 11:00 07-Nov-17 17:00 30 Hours
Continuous
320p152 GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ALTALINK 06-Nov-17 13:00 09-Nov-17 17:00 3.17 Days
Continuous
39s T2 TX5778 - GOI 39s T2 Bushing Replacement  
ALTALINK 07-Nov-17 08:00 08-Nov-17 15:00 31 Hours
Continuous
28s T2(TX18775) - GOI Maintain and Doble transformer  
ALTALINK 07-Nov-17 13:00 07-Nov-17 17:00 4 Hours
Daily
953L (755s - 574s) De-energize 953L needs to be de-energized as part of the 9404R Bonlea - 9933R ATCO Strome radio replacement  
ENMAX 07-Nov-17 14:00 12-Nov-17 15:00 5.04 Days
Continuous
1GSU. 25B240-D132. 25B240-D131 Repair SW.132  
ALTALINK 08-Nov-17 07:00 09-Nov-17 17:00 1.42 Days
Continuous
320p752 GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ALTALINK 08-Nov-17 08:00 08-Nov-17 17:00 9 Hours
Daily
74s103 Advice C phase mech local/remote switch does not work. Will operate remotely in either position. Needs to be re-wired.  
ALTALINK 09-Nov-17 08:00 15-Nov-17 17:00 6.38 Days
Continuous
914L (89s-86s) GOI [SWEATD] Cut 914L in/out of 289s, add new 1112L  
ATCO 10-Nov-17 07:00 03-Dec-17 17:00 23.42 Days
Continuous
9L99 FS
Switching to isolate 9L99. Isolation points to be 906B, 907B, and 9L99PT1X,1Y, 904TD and 901B @ Sheerness
 
ALTALINK 13-Nov-17 07:00 13-Nov-17 12:00 5 Hours
Daily
17s13 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 13-Nov-17 07:00 16-Nov-17 17:00 3.42 Days
Continuous
74s (925L-63s) – Advice 74s49 PT Replacement  
ATCO 13-Nov-17 07:00 16-Nov-17 18:00 3.46 Days
Continuous
9L912 Upgrade 9L912 protection. Altalink to upgrade their end at the same time.  
ALTALINK 13-Nov-17 10:00 16-Nov-17 17:00 3.29 Days
Continuous
63s (912L - A766s) - GOI Replace A and B Line Protection  
ALTALINK 13-Nov-17 12:30 13-Nov-17 17:30 5 Hours
Daily
17s4 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 13-Nov-17 12:30 16-Nov-17 17:30 3.21 Days
Continuous
77s40 (938L) - GOI 240kV CT replacement & 77s40 mtce.  
ALTALINK 14-Nov-17 07:00 14-Nov-17 12:00 5 Hours
Daily
17s9 - GOI Required Trip Test for Protection Upgrade & PMU Replacement  
ALTALINK 14-Nov-17 12:30 14-Nov-17 17:30 5 Hours
Daily
17s2 - GOI Required Trip Test for Protection Upgrade & PMU Replacement  
ALTALINK 15-Nov-17 07:00 15-Nov-17 12:00 5 Hours
Daily
17s1652 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 15-Nov-17 07:00 05-Dec-17 17:00 20.42 Days
Continuous
1043L (320p-E816s) GOI [SWEATD] 320p SCADA work (Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time) and 1043L reconfig  
ALTALINK 15-Nov-17 12:30 15-Nov-17 17:30 5 Hours
Daily
17s85 (T2 TX18477) - GOI Required Trip Test for Protection Upgrade  
ALTALINK 16-Nov-17 07:00 16-Nov-17 12:00 5 Hours
Daily
17s16 (C1) - GOI Required Trip Test for Protection Upgrade  
ALTALINK 16-Nov-17 14:30 16-Nov-17 15:00 30 Mins
Daily
163s1752 & (1002L-275s) open - Advice 1002L Required to commission New 163s1752 Breaker  
ATCO 17-Nov-17 07:00 20-Nov-17 17:30 3.44 Days
Continuous
9L01 9L01 Install piles for new structures for Thickwood tap.  
ATCO 20-Nov-17 07:00 03-Dec-17 17:00 13.42 Days
Continuous
9L933 (1) FS
Switching to isolate 9L933 to disconnect, remove, and replace Thermal RAS 37 relays
 
ALTALINK, Lethbridge 20-Nov-17 08:00 30-Nov-17 16:00 10.33 Days
Continuous
207L (111s Coalbanks - 370s North Lethbridge) relay upgrades  
ALTALINK 20-Nov-17 10:00 30-Nov-17 14:00 10.17 Days
Continuous
370s (207L-L111s) - GOI Altalink & Lethbridge Relay Upgrade  
ALTALINK 27-Nov-17 07:30 30-Nov-17 17:30 3.42 Days
Continuous
933L(132s - A801s) - GOI Replacing 'A' & 'B' line protections  
ENMAX 27-Nov-17 08:00 01-Dec-17 16:00 4.33 Days
Continuous
162.1TR Commision new equipment for 162.3TR addition  
ALTALINK 27-Nov-17 09:30 30-Nov-17 17:00 3.31 Days
Continuous
77s T1,138kV and 240kV West Bus - GOI Protection upgrade  
ENMAX 28-Nov-17 08:00 28-Nov-17 16:00 8 Hours
Continuous
162B240-RB131. 162B240-RB134. PT Z43 Commision new equipment for 162.3TR addition  
ALTALINK 29-Nov-17 07:00 29-Nov-17 17:00 10 Hours
Daily
320p400 GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ALTALINK 29-Nov-17 08:00 29-Nov-17 14:00 6 Hours
Daily
320p T1 (Tx18429) & 240kV 'B' Bus Advice Trip test 320p91, 320p1352, 320p752 & 320p2152 from new 320p352 breaker fail  
ATCO 04-Dec-17 07:00 05-Dec-17 17:00 1.42 Days
Continuous
6L57 Reroute line  
ALTALINK 04-Dec-17 07:00 08-Dec-17 17:00 4.42 Days
Continuous
17s4 - GOI 17s4 C60 Relay Installation & PMU Replacement  
ATCO 04-Dec-17 07:00 11-Dec-17 17:00 7.42 Days
Continuous
801S 900 BUS 2 240kV bus # 2 OOS for Construction - Protection upgrade, Breaker and a third bus configuration at 801s will be open at one end  
ALTALINK 04-Dec-17 09:15 08-Dec-17 17:45 4.35 Days
Continuous
1034L (244s - 324s) - GOI damper/insulator maintenance  
ALTALINK 04-Dec-17 09:30 07-Dec-17 17:00 3.31 Days
Continuous
77s T2,138kV and 240kV East Bus - GOI Protection upgrade  
ALTALINK 07-Dec-17 08:00 07-Dec-17 13:00 5 Hours
Daily
17s3 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 11-Dec-17 08:00 11-Dec-17 16:00 8 Hours
Daily
17s12 - GOI Required For PMU Replacement  
ALTALINK 11-Dec-17 09:15 15-Dec-17 17:45 4.35 Days
Continuous
1035L (244s - A2075s) - GOI damper/insulator maintenance  
ALTALINK 12-Dec-17 08:00 12-Dec-17 16:00 8 Hours
Daily
17s8 - GOI Required For PMU Replacement  
ENMAX 08-Jan-18 08:00 19-Jan-18 16:00 11.33 Days
Continuous
28.80L. 28s & Sarcee 138KV Bus Differential Protection Line Protection Upgrade  
ALTALINK 08-Jan-18 11:00 11-Jan-18 17:00 3.25 Days
Continuous
1203L (320p - 510s) GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ATCO 15-Jan-18 07:00 18-Jan-18 12:00 3.21 Days
Continuous
801S 910 Protection upgrade  
ATCO 15-Jan-18 07:00 22-Jan-18 17:00 7.42 Days
Continuous
801S 9L100D1 Protection upgrade testing and commissioning  
ATCO 15-Jan-18 07:00 27-Jan-18 17:00 12.42 Days
Continuous
9L70 Protection upgrade

FS
Switching to isolate 9L70. Isolation points to be 903A, 904A, and 9L70D2 @ 946S Oakland
PSE crew
Complete control wiring for 903B, 904B, 9L70D1
Continue prep work for future outages
Commissioning
Commission control for 903B, 904B, 9L70D1
End to end tests with TOC
ASE
Telecontrol programming
 
BCH 16-Jan-18 09:00 16-Jan-18 17:00 8 Hours
Continuous
1L274 (Line Creek - Elkford) 2018 annual plan work AB-BC
BCH 17-Jan-18 09:00 26-Jan-18 17:00 9.33 Days
Continuous
1L274 (Britt Creek - 1D4L274) 2018 annual plan work AB-BC
ATCO 19-Jan-18 07:00 22-Jan-18 17:00 3.42 Days
Continuous
801S 911 Protection upgrade  
ALTALINK 25-Jan-18 06:00 28-Jan-18 17:00 3.46 Days
Continuous
41s station,880L(523s-41s) Advice Install 880L bypass, cut free 41s  
ATCO 30-Jan-18 07:00 01-Feb-18 17:30 2.44 Days
Continuous
9L46 Attach new Sharp Hills wind farm in/out connection.  
ATCO 02-Feb-18 07:00 09-Feb-18 17:30 7.44 Days
Continuous
9L07 Install 9L07 cut in structures for new 951S Thickwood Hills substation.  
ATCO 09-Feb-18 07:00 11-Feb-18 17:30 2.44 Days
Continuous
9L07 (1) String new portion 9L01/9L30 over 9L07 for new 951S Thickwood Hills substation.  
BCH 20-Feb-18 08:00 02-Mar-18 16:00 10.33 Days
Continuous
1L274 (48s Pocaterra - Britt Creek) 2018 annual plan work AB-BC
ATCO 27-Feb-18 07:00 04-Mar-18 18:00 5.46 Days
Continuous
7L22 Build junction for new in and out POD 2030S Hughes  
BCH 06-Mar-18 08:00 16-Mar-18 16:00 10.29 Days
Continuous
1L274 (B1s BCH Natal - 1D1L274) 2018 annual plan work AB-BC
ATCO 07-Mar-18 07:00 16-Mar-18 17:30 9.4 Days
Daily
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Install new structures.  
ATCO 10-Sep-18 09:00 14-Sep-18 17:00 4.33 Days
Continuous
801S 901T 801S Anderson 901T Re-test Sept 10, 2018  
ATCO 08-Jan-19 07:00 11-Jan-19 17:30 3.44 Days
Continuous
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Remove bypass at substation.  
ATCO 15-Jan-19 07:00 18-Jan-19 17:30 3.44 Days
Continuous
9L07 Cut in 951S Thickwood Hills substation.  

AB-BC, AB-SK & AB-MATL: refer to AESO web posting: http://itc.aeso.ca/itc/public/reportIndex.do
Also,
AB-BC, AB-SK & AB-MATL: refer to ISO Rule 203.6: http://www.aeso.ca/rulesprocedures/18592.html

Prepared On: 2017-09-20   4:09:11 PM


This document and the information contained herein are based upon information and data which by their nature contain a degree of uncertainty and are subject to change. In addition, this document may contain information and data from public sources and/or third parties, which have been assumed to be accurate and complete and have not been verified. Accordingly, the Independent System Operator, operating as the Alberta Electric System Operator (the "AESO") makes no warranty, representation or guarantee, express or implied, with respect to this document or the information contained herein, including, but not limited to, any warranty, representation or guarantee of accuracy, completeness, timeliness, reliability, availability, absence of computer virus, non- infringement, merchantability or suitability for any purpose. Under no circumstances will the AESO, its members, officers, employees, contractors or agents, or any of their respective affiliates, be liable for any errors or omissions in, or any losses, damages or claims whatsoever, whether in contract, tort or otherwise, arising from use of or reliance upon, this document or any information contained herein.

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