当起风的时候，风力通常是最廉价的可用调峰能源，如此一来天然气发电厂就可以关闭。
When the wind is blowing, it is usually the cheapest peaking power available, so it keeps the natural gas plants shut off.
为了满足能源需求峰值，他们所需的电力则来自于通常以天然气为发电能源的调峰发电厂。
The electricity they need to meet the peaks in energy demand is generated by what are known as peaking plants, usually powered by natural gas.
刘家峡水电厂在西北电网中主要承担发电、调峰、调频和调压任务，是西北电网的骨干电站，在西北电力系统中处于十分重要的地位。
As a backbone of the Northwest power Network, Liujiaxia Hydropower Plant plays the roles of generate electricity, peak modulation, frequency modulation and voltage modulation.
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