Frequency measurements from 2015 (data: 50Hertz): the power grid frequency fluctuates around 50 Hz in the European grid and exhibits large jumps particularly in the trading intervals of 15 minutes. Usually, the grid frequency is within the yellow area but upward and downward deviations (grey) are particularly likely every 15 minutes. Copyright: MPI für Dynamik und Selbstorganisation / Benjamin Schäfer
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