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In the last 30 days, Europe's electricity sector CO2 emissions have collapsed by 39%.

This is giving valuable lessons on how to run a fossil-free electricity grid.

What are these lessons?
THREAD: 1/11
2/11 The lights have stayed on! The electricity system is robust: no excuse to slow wind+solar investment.

That's despite a 42% fall in Europe's coal gen & 30% fall in gas gen (chart).

Read EU's security briefing: ec.europa.eu/info/news/focu…

@ENTSO_E's summer outlook out end-May
3/11 But record negative prices show there are supply/demand inflexibilities.

Common in Germany+Denmark+UK for a while, but now increasingly common in Belgium, Czechia, Finland, France, Ireland, Netherlands...
4/11 Some fossil plants, esp Lignite, is inflexible.

On Sunday 5-Apr lunchtime, 10 countries had zero/negative prices, so we can see what fossil can't turn off at zero cost.

For Bulgaria, Czechia and Germany, it's mostly lignite. Early closure would make grid more flexibile..
5/11 On Easter Sunday/Monday, we can see how nuclear was also inflexible at zero/negative prices.

Almost all countries showed near-zero output reductions.

Only the German fleet, and French fleet (not pictured), reduced load. And that was only by around 1/3rd.
6/11 EDF's French nuclear inflexibility runs deeper.

Coronavirus means they must postpone maintenance. This means they have announced to reduce output by 170TWh(!) to 2022 to save fuel.

This is a gifthorse to coal+gas🙄

edf.fr/en/the-edf-gro…
7/11 Even renewables needs to learn to be flexible.

In Germany on Easter Sun/Mon negative prices
- Onshore wind: reduces by only half
- Offshore wind: reduces even less
- Solar: no reduction
- Biomass: no reduction

All future renewables auctions should mandate flexibility.
8/11 Demand isn't flexible to prices.

But innovation is happening!

For example, @octopus_energy dynamic tariff means people got paid to use electricity when wholesale prices went negative:

9/11 Grid companies need to be proactive.

In April, they invented new "super-sel" contract, to reward plants this summer to operate at ultra-low output:

Hats off to @ng_eso for committing to be able to run the UK's national grid fossil-free by 2025.

nationalgrideso.com/industry-infor…
10/11 There's lots of great innovation in grid stability.

For example, @Draxnews Drax's hydro plants are providing inertia to keep the grid stable, which used to only be done by coal and gas plants:

drax.com/technology/why…
11/11 Running a fossil-free grid won't be easy.

But with vastly lower coal+gas generation across the world right now due to coronavirus, we can all learn lots of lessons.

Full analysis here by @CoalFreeDave, with muchos input+thanks to @DrSimEvans:
carbonbrief.org/analysis-coron…
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