Frequency of the Continental European power grid
-Hz -
- Deviation
- -from 50 Hz
- 1-min change
- -vs. a minute ago
- Fluctuation
- -in 15 min
Loading the current grid frequency.
Source: Energy-Charts (Fraunhofer ISE), measured in Freiburg im Breisgau, licence CC BY 4.0. Per-second values, delayed by about one to two minutes.
Classification of the current frequency
Nominal value 50.000 Hz. The bands show the ENTSO-E operating ranges, the grey bar the range of the last 15 minutes.
The last 15 minutes
Per-second values, updated every minute.
Frequency over the day
Per-minute values: line = mean, area = lowest to highest per-second value of the minute.
Today
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Deviations of 100 mHz or more
An event starts at a deviation of more than 100 mHz and ends once the frequency has been back within ±50 mHz for 30 seconds. Many occur at the top of the hour, when power plants and consumers change their schedules at the same time.
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Every day documented
For each day: low and high, dispersion, time outside the standard range and the raw per-second data for download (CSV).
Calendar of recent days, colour by the day’s largest deviation:
Notifications for extreme values
You will receive a notification as soon as the frequency exceeds your threshold - once per event, even when this page is closed. Readings arrive with a delay of about one to two minutes.
What the grid frequency shows
In the Continental European power grid - from Portugal to Turkey and Ukraine - all large generators run in synchronism. Their common speed is the grid frequency, nominally 50.000 Hz. If more power is consumed than generated, it falls; with a surplus, it rises. The frequency is therefore a direct measure of the balance between supply and demand.
Levels
The classification follows the frequency ranges of ENTSO-E, the association of transmission system operators: the standard range lies within ±50 mHz. At ±200 mHz the frequency containment reserve (FCR) is fully activated, from 49.8 Hz the alert state applies, and from 49.0 Hz automatic load shedding begins. The levels are a guide, not an official assessment of the supply situation.
Data and licence
The per-second values come from Energy-Charts.info of the Fraunhofer Institute for Solar Energy Systems ISE (measured in Freiburg), licensed under CC BY 4.0. Netzfrequenz.app retrieves them every minute, checks them for plausibility, calculates per-minute values, daily extremes and events, and archives all raw values. The display is therefore delayed by about one to two minutes.
Top of the hour
Electricity is traded in hourly and quarter-hourly blocks. At the change of the hour, many power plants change their output at the same time, while the load does not follow at the same pace - the frequency jumps briefly. Such deviations are the most common extremes and are marked separately.