The utility frequency, specified in Hertz, is calculated from the polarity changes per second, which are expressed in voltage waves. At a utility frequency of 50 Hz, a total of 50 voltage waves occur per second, with the voltage changing polarity 100 times.
Since it is difficult to store electricity in the grid, there must be a balance between production and consumption for the power supply to function properly. If the utility frequency deviates from the nominal value, it is the result of either a surplus or shortfall of electricity. This makes the utility frequency a reference value for available power in a given moment.
Only minor deviations from the 50 Hz nominal value are possible in the European power system, meaning intervention by network operators occurs with decreasing frequency. Nevertheless, ancillary services are constantly standing by to rebalance any discrepancies that may occur. Increased use of renewable energies can theoretically lead to greater frequency fluctuations, but as past years have shown, this does not necessarily impact grid stability (as referenced in the SAIDI index).
Disclaimer: Next Kraftwerke does not take any responsibility for the completeness, accuracy and actuality of the information provided. This article is for information purposes only and does not replace individual legal advice.
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