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?
One day after the publishing of the Grid Frequency Report of February, there were some interesting things going on on Sunday. Two different oscillation phenomenon were detected, one in the… Weiterlesen »Oscillations on 1st of March 2026
Welcome to the second 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 02-2026
TL;DR Die scheinbaren „Störungen“ im Frequenzsignal sind meist keine Messfehler. Sie entstehen durch reale Lastwechsel im Netz, die Spannungsamplitude und Phasenwinkel verändern. Phasensprünge führen zu kurzen Frequenzpeaks, schnelle Amplitudenänderungen erzeugen… Weiterlesen »Transiente Phänomene bei der Frequenzmessung
Welcome to the new format of reporting 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 01-2026
Time goes by so fast – PQopen is now online for half a year now. Started in June 2025 with one measurement location in AT/Graz, now operating 7 remote measurements,… Weiterlesen »2025 in review
Many of you use the PQopen Dashboard (pqopen.com) to inspect the current and historical state of the Central European power grid. From today onwards, it will be possible to use… Weiterlesen »PQopen API
Im Rahmen meiner Arbeit am PQopen-Projekt habe ich viele interessante Menschen kennengelernt und viel dazugelernt. Die Funktionalität einer PMU (Phasor Measurement Unit) hat mich dabei immer wieder fasziniert. PMUs sind… Weiterlesen »PQopen PMU Prototyp
In the evening of the 5th of October, between 20:00 and 20:40 CET, a strong 3 Hz oscillation of power frequency and voltage was detected from the PQopen measurement system… Weiterlesen »Oscillation on 5th of October – An Analysis
Ich hatte in der Vergangenheit schon über das Schwingungs-Phänomen berichtet, welches an manchen Tagen in Deutschland, insbesondere an der Messstation DE/Stade, detektierbar ist. In diesem Beitrag möchte ich versuchen, die… Weiterlesen »Schwingungen im Netzverbund – Grundlagen