On September 8, 2026 at one of the PQopen measurements in the Netherlands reported a voltage swell of about 20 minutes duration with a maximum level of up to 289… Weiterlesen »Overvoltage event of 8 September 2026, Middelburg (NL)
In this more or less regular series, I want to show interesting patterns of power measurements of appliances. The first one is an air compressor with 1-cylinder, powered by a… Weiterlesen »Behind the current – Air compressor
Welcome to the 7th report this year of the data acquired with the PQopen measurement network. News of PQopen Network New Locations in the Netherlands I got many requests for… Weiterlesen »Grid Frequency Report 07-2026
Why waveform data reveals what aggregation hides In power system measurement and analysis, the method you choose for data acquisition is an important factor – especially when you’re chasing a… Weiterlesen »The Power Behind Point-on-Wave Acquisition
Welcome to the 6th report this year of the data acquired with the PQopen measurement network. News of PQopen Network New Location in Southern-East Europe Since June, there is a… Weiterlesen »Grid Frequency Report 06-2026
Welcome to the 5th report this year of the data acquired with the PQopen measurement network. News of PQopen Network Netherlands – more insights Due to the good response of… Weiterlesen »Grid Frequency Report 05-2026
Welcome to the 4th report this year of the data acquired with the PQopen measurement network. Summary In the summary, the 1s-mean value of the mains frequency is evaluated. Statistics… Weiterlesen »Grid Frequency Report 04-2026
„Die Frequenz schwankt heute aber schon stark – früher gab es das nicht!“ Mit dieser Feststellung werde ich oft konfrontiert. Es herrscht die weitverbreitete Meinung, dass die Netzfrequenz in Europa… Weiterlesen »Netzfrequenz im Wandel: Wird unser Stromnetz wirklich immer „unruhiger“?
Welcome to the third report this year of the data acquired with the PQopen measurement network. Summary In the summary, the 1s-mean value of the mains frequency is evaluated. Statistics… Weiterlesen »Grid Frequency Report 03-2026
Since the launch of PQopen, I am frequently asked: How can a phenomenon discovered in a local low-voltage (LV) grid be classified as a cross-regional event? In this article, I… Weiterlesen »Can Local Measurements Explain High-Voltage Grid Phenomena?