Electric utilities need to maintain a balance between generation output (supply) and load (demand) at all times. This means that electricity must be available just when the customer needs it.
Since the output of a wind turbine varies according to wind speed and is only partially predictable, wind power must be used in conjunction with a more controllable source of energy. Countries with extensive wind capacity, such as Germany, rely on thermal generation to complement wind power.
In Québec, we use hydropower, a renewable type of energy, in conjunction with wind power.
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