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The electricity is turned on after the evening peak demand, and turned off in the morning before the morning peak demand starts. The cost for such power is less than the "on-demand" power which makes it worthwhile for the user to subscribe to it. A nuanced system is possible with benefits for the power company and the electricity user.
In 2014 BC had the largest volume of electricity imports in Canada (9700 Mwh), from the Western Interconnection in the US which is 60% fossil fueled. [57] [58] BC Hydro typically imports power during off-peak hours when thermal plants in the US and Alberta have excess power for sale, then exports hydropower during peak hours when prices are higher.
While the average wholesale pool price on-peak times was approximately CA$70/MWh since 2000, and CA$31/MWh during off peak times, [6] the average price on August 12, 2021, was CA$142/MWh with an average of CA$103.51 for 2021 to date, representing the highest price in 20 years, according to AESO data. [4]
Loch Mhor is used to generate hydro-electric energy at peak demand or in an emergency. Peak demand on an electrical grid is the highest electrical power demand that has occurred over a specified time period (Gönen 2008). Peak demand is typically characterized as annual, daily or seasonal and has the unit of power. [1]
August 1—Canada—In the Laurentians of Québec, a large number (146,000, at its peak in the evening) of households were left without electricity for a whole day, and some for up to a week, due to intense thunderstorms that rolled through southern Quebec, including the greater Montreal area. Over 450,000 customers in total were affected. [85]
Peak demand management does not necessarily decrease total energy consumption, but could be expected to reduce the need for investments in networks and/or power plants for meeting peak demands. An example is the use of energy storage units to store energy during off-peak hours and discharge them during peak hours. [4]
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As of 2014, time-of-day power rates are only available for customers using approved electric thermal storage heating systems, who pay between 14 and 19 cents/kW·h on-peak and 7.3 cents/kW·h off-peak. [31] The rates and necessary metering equipment have not been offered to other customers who requested them. [32]