Interessantes Interview zum chinesischen Energie- und vor allem Stromsystem:https://www.carbonbrief.org/the-carbon-brief-interview-prof-zou-ji/

Für diesen Sub besonders relevant fand ich diesen Abschnitt. Was haltet Ihr davon?

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What we want to push [can be] compared to a benchmark [set by the] German grid. As you may know, Germany’s grid is one of the most advanced grids in the world, in terms of featuring a higher share of renewable generation – it can have up to 40% or even 50% of generated power come from solar and wind power. But what I’m thinking about now is if China can catch up and fill the gap between its grid and the German grid.

I’ve heard a lot of different opinions from power experts, [which] I will not go into detail here – it is too technical! But one long-term consideration to overcome…is the higher and higher marginal cost of raising the share of renewables in the German grid. This means [progress] to further enlarge the share of renewables in their grid has become slower. If this is the case for Germany today, this might also be the case for China tomorrow. That means that there might be some physical limitations [to having a higher share of renewables] in the current power system and the grid system.

But certainly the first step for China should be to close the gap between its current performance and Germany’s performance. Beyond that, a 40-50% [renewables] share is not enough for carbon neutrality or for [meeting the target of] 1.5C. We want to have more. What is the way out? We should also consider… creat[ing] another, totally new power system. This would be a sort of nexus of centralised and decentralised grid systems… If [the central grid] is having difficulties [increasing renewable generation], and if these are very challenging to overcome, then let’s [shift] to a lot of microgrids, together with a distribution grid, which would act as a lower level of the grid.

[To do this] you need to figure out a lot of technological issues, including [the use of] transformers and changing the [grid] system. To allow [for] more and more distributed renewables, it should not be necessary [for them] to be connected to the centralised grid system. [Instead, microgrids] should just have to connect with each other, with [households] having their own rooftop solar [panels] which are connected with each other using AI technology, etc. And if they do that, then most of [China’s] electricity [will be] generated by distributed renewables. That way, we [can] rely on the centralised grid less and less.

This might be one way to figure out today’s bottleneck, and Energy Foundation China is exploring a pilot [to trial this]. The solution is mainly applicable to rural areas…households… and also SMEs outside the central mega-cities…This might serve as the power source [that will cover] the increase in our power demand in the future. We can stop [the go-to solution being to rely on] coal or other fossil fuels, and instead from the very beginning [demand would be met through] renewables. So that is something I’m thinking about.

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