Constrained Down Generation
Transmission Constraint Management (TCM) Rule Cost Reporting
The Alberta Utilities Commission has directed us to report on costs of the Transmission Constraint Management rule, including cost of constrained-down generation and transmission must run.
- 2020 TCM cost annual report[Posted: June 12, 2020]
- 2019 TCM cost annual report[Posted: June 14, 2019]
- 2018 TCM cost annual report[Posted: June 14, 2018]
- 2017 TCM cost annual report[Posted: June 15, 2017]
- 2016 direction 3 annual report
- 2015 direction 3 annual report
- 2014 direction 3 annual report
Constrained Down Generation
Occasionally, insufficient transmission capacity causes generation to be constrained. These types of situations are mitigated by AESO system controllers but are sometimes unavoidable. The AESO reports on constrained-down generation in all regions of the province.
Table 1: Annual total estimated constrained-down generation (GWh)
| Year | Central East | Cold Lake | Crossfield | KEG | North – South | Northeast | Northwest | South | All |
| 2011 | 4 | 0 | 1 | 81 | 5 | 14 | 0 | 3 | 108 |
| 2012 | 7 | 0 | 0 | 54 | 0 | 21 | 0 | 1 | 84 |
| 2013 | 19 | 0 | 2 | 43 | 1 | 33 | 3 | 2 | 103 |
| 2014 | 1 | 0 | 0 | 131 | 1 | 13 | 0 | 3 | 149 |
Table 2: Number of hours with constrained-down generation
| Year | Central East | Cold Lake | Crossfield | KEG | North – South | Northeast | Northwest | South | All |
| 2011 | 84 | 0 | 29 | 304 | 44 | 384 | 0 | 861 | 1465 |
| 2012 | 71 | 0 | 10 | 196 | 5 | 335 | 12 | 294 | 932 |
| 2013 | 246 | 7 | 193 | 126 | 10 | 503 | 311 | 388 | 1596 |
| 2014 | 8 | 19 | 0 | 322 | 5 | 227 | 29 | 150 | 760 |
Download the latest constrained-down generation report.
