Mainland Frequency Spikes to 50.2 on Tue 19th August 2025
On Tuesday the 19th of August between 11:45 and 12:20 there was a significant frequency deviation on the mainland.
On Tuesday the 19th of August between 11:45 and 12:20 there was a significant frequency deviation on the mainland.
An initial review of payment and cost outcomes of the first 44 days of financial operation of the FPP arrangements.
In reviewing system frequency on the 16th of June, 2025, we observed a drop that reached below the NOFB.
At 16:01 on April 10, 2025, a system frequency dip was observed from the Global-Roam frequency logger.
High speed frequency measurements provide a deeper understanding of how the system responded to the unplanned 500kV line outage.
It was captured by a keen eyed reader, that the distribution of mainland grid frequency in recent times now exhibits cat ears.
In this overview, we take a longitudinal look back at how frequency has changed over the years.