Subventions et des contributions :

Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2018-2019).

The mine complexes (underground mine and above ground mill) Goldcorp operates in Ontario draw largex000D
amounts of power. Power billing for large industrial consumers ascribes a high cost to annual consumption ifx000D
electricity is used on any of the top five overall 'calendar' demand hours for the entire province [17,19].x000D
Goldcorp wants to avoid the top demand hour on five different days where these five peaks are the highest forx000D
the fiscal year. The site need only reduce the load long enough to ensure the peak demand hour is avoided.x000D
Idling the mine and switching from line power to expensive diesel generation causes major productionx000D
disruptions. The site requires about six hours of reduced load to avoid the one-hour peak event. Thisx000D
shut-down practice also suspends all gold production. If the provincial load for the entire next year werex000D
known in advance, Goldcorp's problem would be easily solved by finding the top consumption calendar hoursx000D
and, for each of these hours, determine the optimal way to avoid high electricity costs by deciding how much tox000D
idle, what to idle, and what to replace with on-site diesel generation.x000D
However, the provincial peak-load hour is not known a whole year in advance, although provincial loadx000D
predictions, which are fairly accurate up to 2-3 days in advance, can be made using publicly available weatherx000D
forecasts and the historical relationship between load and temperature at given hours [6].x000D
Idling the operation involves major lost opportunity and additional costs. Mine personnel want to minimize thex000D
expected number of days that this power-management strategy is employed for ceasing mine production.x000D
Simultaneously, however, the site wants to strongly dissuade operation at any time during the top five peakx000D
hours. To make this trade-off optimally, the initial part of the evaluation will be to quantify the cost of runningx000D
in a top-five day against the cost of idling for a day and a focus on quantifying and appropriately adjusting thex000D
shut-down threshold. Goldcorp stands to improve revenue by approximately $1.8 M CAD through additionalx000D
production and avoid high annual "Global Adjustment" power costs in the order of $ 6 M CAD.