Net Zero Watch warns of growing grid instability
April 29, 2025
By Paul Homewood
With more than 50 million EU electricity consumers suffering blackouts yesterday, campaign group Net Zero Watch has reiterated its warning that the UK power grid is also becoming increasingly unstable.
Grid analysts have suggested a high likelihood that the extent of yesterday’s blackout in Iberia was a result of the Spanish grid operating almost entirely on renewables at the time. The stability of power grids depends on so-called ‘inertia’, a resistance to rapid change that is an inherent feature of large spinning turbines, such as gas-fired power stations, but not of wind and solar farms. Too much renewables capacity on a grid can therefore mean inadequate inertia. As a result, in grids dominated by wind and solar, faults can propagate almost instantaneously across grids, leading to blackouts.
In a recent Net Zero Watch paper, entitled Blackout Risk in the GB Grid, energy system analyst Kathyn Porter pointed out that our own electricity system is also becoming increasingly unstable. Large fluctuations in grid frequency – the first sign of problems – are becoming much more common.
https://notalotofpeopleknowthat.wordpress.com/2025/04/29/net-zero-watch-warns-of-growing-grid-instability/
