Frank Duerr

I've decided to continue this projekt at least until February 2023. New measuerements will be published weekly.

You can find all measurements here: doi.org/10.5281/zenodo…

Time for a short summary of the mains frequency measurements of 2022. As shown by the following box plot, there is no indication of a critical deviation from the 50 Hz nominal frequency, "critical" defined as being outside the range [49.8 Hz, 50.2 Hz].

How to interpret these numbers: + Normal operation area: [49.8 Hz,50.2 Hz] + Minimum/maximum instantaneous frequency after loss of generation/load: [49.2 Hz,50.8 Hz] Higher deviations lead to load shedding and possible grid failure.

Measured in Southern Germany (Plochingen). Disclaimer: these numbers have been provided by a private user, hoping they are interesting to the community, but without implying endorsement of any third party. All measurements are available at: doi.org/10.5281/zenodo…

Mains Frequency (f) -- Summary Week 51/2022: min(f) = 49.889 Hz max(f) = 50.109 Hz mean(f) = 50.0006 Hz 99 % confidence interval of the mean = [50.00059 Hz,50.00063 Hz]

*THIS* is a keyboard! #ibm #modelm #terminal

How to interpret these numbers: + Normal operation area: [49.8 Hz,50.2 Hz] + Minimum/maximum instantaneous frequency after loss of generation/load: [49.2 Hz,50.8 Hz] Higher deviations lead to load shedding and possible grid failure (#blackout).

Measured in Southern Germany (Plochingen). Disclaimer: these numbers have been provided by a private user, hoping they are interesting to the community, but without implying endorsement of any third party. All measurements are available at: doi.org/10.5281/zenodo…

Mains Frequency (f) -- Summary Week 49/2022: min(f) = 49.898 Hz max(f) = 50.115 Hz mean(f) = 49.9998 Hz 99 % confidence interval of the mean = [49.99981 Hz,49.99985 Hz]

How to interpret these numbers: + Normal operation area: [49.8 Hz,50.2 Hz] + Minimum/maximum instantaneous frequency after loss of generation/load: [49.2 Hz,50.8 Hz] Higher deviations lead to load shedding and possible grid failure (#blackout).

Measured in Southern Germany (Plochingen). Disclaimer: these numbers have been provided by a private user, hoping they are interesting to the community, but without implying endorsement of any third party. All measurements are available at: doi.org/10.5281/zenodo…

Mains Frequency (f) -- Summary Week 48/2022: min(f) = 49.893 Hz max(f) = 50.098 Hz mean(f) = 50.0003 Hz 99 % confidence interval of the mean = [50.00025 Hz,50.00029 Hz]

How to interpret these numbers: + Normal operation area: [49.8 Hz,50.2 Hz] + Minimum/maximum instantaneous frequency after loss of generation/load: [49.2 Hz,50.8 Hz] Higher deviations lead to load shedding and possible grid failure (#blackout).

Measured in Plochingen, Germany. Disclaimer: these numbers have been provided by a private user, hoping they are interesting to the community, but without implying endorsement of any third party. All measurements are available at: doi.org/10.5281/zenodo…

Mains Frequency (f) -- Summary Week 45/2022: min(f) = 49.897 Hz max(f) = 50.114 Hz mean(f) = 49.9983 Hz 99 % confidence interval of the mean = [49.99832 Hz,49.99837 Hz]