Recalculated 2007 loss factors
Recalculated 2007 loss factors
Loss factors are used to determine the transmission losses charges that apply to system access service under the following rates of the ISO tariff in 2007:
- Rate STS, Supply Transmission Service
- Rate XOS, Export Opportunity Service
- Rate IOS, Import Opportunity Service
- Rate DOS, Demand Opportunity Service
The AESO must recalculate loss factors and losses charges in accordance with Decisions 790-D04-2016 and 790-D06-2017 of the Alberta Utilities Commission in Proceeding 790, Complaints Regarding the ISO Transmission Loss Factor Rule and Loss Factor Methodology. On August 6, 2021, the AESO advised market participants and other interested parties that it had corrected errors identified in system topologies used in the initial recalculation of Module C loss factors for 2007. For more information, see the update posted in the stakeholder engagement section of the loss factor page here. The corrected 2007 loss factors are provided here:
- Recalculated 2007 loss factors effective 1 Jan 2007 to 31 Dec 2007 [Corrected: Aug 6, 2021]
The AESO must provide additional information related to the recalculated loss factors. This additional information is provided here:
- Hourly merit order data for 2007 loss factors (ZIP file, 7 MB) [Posted: Jan 12, 2021]
- Sample of hourly load data for 2007 loss factors (ZIP file, 2 MB) [Posted: Jan 12, 2021]
- Process for requesting access to system topologies
- Procedure to determine transmission system losses for loss factor calculations [Posted: Jan 12, 2021]
- Software and scripts used to calculate hourly raw loss factors (ZIP file, 89 MB) [Posted: Jan 12, 2021]
- Workbook showing calculations for 2007 loss factors (Microsoft Excel, 64 MB) [Corrected: Aug 6, 2021]
The initial loss factor postings for the third Module C settlement period, which have been corrected above, remain available below for the interest of stakeholders:
- Recalculated 2007 loss factors effective 1 Jan 2007 to 31 Dec 2007 [Posted: Jan 12, 2021]
- Workbook showing calculations for 2007 loss factors (Microsoft Excel, 64 MB) [Posted: Jan 12, 2021]
Actual losses on the transmission system were 2,816 GWh for 2007 and the average loss factor for the transmission system was 4.94% for 2007.
