The grid frequency is measured every half second during 2019, at DTU Risø Campus, Zealand, Denmark (DK-2), which is a part of the Nordic power system (ENTSOE RG-N). 340.8 days are measured with the DEIF MTR-3 24.2 days are not measured. The MTR-3 has an accuracy of 10 mHz There is one column with the UNIX timestamp in milliseconds and one column with the frequency measurement. The dataset has a fixed sample rate of 0.5 s, and missing samples are replaced with NaN so there are 24*7200*365=63,072,000 rows in the set.
Funding
EUDP project ACES - Across Continent Electric Vehicle Services (grant EUDP17-I-12499, website: www.aces-bornholm.eu).