What does utility frequency mean?
It is well-know that household alternating current (AC) in Germany and Europe has a frequency of 50 Hertz (Hz), while other parts of the world run on 60 Hz. What is less known is that this utility frequency (also known as mains frequency or grid frequency) also provides information about the ratio of electricity generation to electricity consumption in a power grid. If the frequency drops too low, there is not enough electricity in the grid; if the frequency increases too much, there is too much electricity in the grid. An intelligent supply-demand mechanism and a functional system for ancillary services to compensate for frequency deviation is necessary to keep the utility frequency at a stable 50 or 60 Hz.
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