UK power cut: blackout sparks questions over UK energy system stability

Posted on 15 August 2019

Black Friday came early this year, but instead of good deals on electrical appliances, it brought UK-wide power cuts.

The National Grid frequency hit 48.8Hz, the most extreme deviation from the 50Hz benchmark since 2008, caused by two widely reported trips at a power station and offshore wind farm. To manage this drop in generation, demand was dropped automatically, impacting over 1 million people across the UK for up to 45 minutes.

At npower Business Solutions, Energy HQ our assets responded immediately to protect our customers from these brownouts and helped support the grid frequency to limit the frequency drop. The graphic below shows the frequency drop and our customers’ assets responding over the period. 



If your business was impacted by the events of Friday afternoon, or if the thought of such an event impacting your operations in the future is a significant risk, then we urge you to get in touch with our Energy HQ Team on 0800 193 6866 or email us at We can offer you support on understanding your risk exposure to future outages, how these risks can be mitigated or removed and how resilience can also generate revenue.

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