Christoph Maurer Profile picture
Sep 5 5 tweets 3 min read
Today, German TSOs @50Hertzcom @Amprion @TenneTTSO @TransnetBW and @bmwk published results of #stresstest regarding prolonged operation of nukes.
You can find my tweets submitted while listening to the press conference below
tl;dr: During the coming winter, there will be risks for security of supply in Germany and Europe. Prolonged operation of nukes could contribute to mitigate, but not overcome those risks. Considering trade-offs, minister #Habeck proposes to keep 2 of 3 nukes in reserve operation
Decision on whether nukes should actually operate will be taken later (and, potentially, continuously revised) taking into account other developments in European power system. Might take one week from decision to actual operation.
Personally, I would have preferred to have all three nukes in operation until end of winter. But I agree with minister #Habeck that this is about trade-offs and my preferences might differ from his or the ones of his constituency.

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More from @maurerchr

Sep 6
Mit Blick auf #AKW lese ich oft, die könnten keinen Preiseffekt haben, weil wir auf GasKWK-Stromerzeugung wegen Wärmebedarf nicht verzichten können. Aufgrund #MeritOrder setzten damit immer teure GasKW den Strompreis.
Das ist ein Missverständnis!
Vereinfacht bestimmen die variablen Kosten des Grenzkraftwerks den Preis. Das Grenzkraftwerk ist anschaulich dasjenige, das 1 kW mehr produzieren muss, wenn die Last um 1 kW steigt (bzw. weniger, wenn Last fällt)
Betrachten wir nun ein Beispielsystem mit einem Braunkohlekraftwerk mit variablen Kosten von 100 EUR/MWh und einem Gas-KWK-Kraftwerk mit variablen Kosten von 400 EUR/MWh. Beide haben 100 MW Leistung. Die KWK-Anlage muss mindestens 40 MW produzieren, um Wärmebedarf zu decken.
Read 7 tweets
Sep 6
With a night's distance I still feel that yesterday's decision on regular shutdown of German NPPs (with a legal possibility of reserve operation for 2 of them, the technical feasibility and practicality of which seems to be challenging at least) is a missed opportunity.
If there was one chance to mitigate, if not resolve the European energy crisis, it would be a grand European bargain, where all EU Member States agree to set aside national policy preferences for the common good.
Despite from limited physical impact of the three NPPs, a decision on prolonged operation by Germany could have been a cornerstone of such policy. That opportunity seems to be gone now.
Read 4 tweets
Sep 5
Especially as TSOs explain that all three plants would contribute to reducing adequacy concerns not only in Germany
Stefan Kapferer, @50Hertzcom, says that availability of nuclear plants could help manage critical situations
Would save 2.4 TWh electricity production in gas-fired plants in Europe (i.e. roughly 5 TWh of natural gas)
Read 13 tweets
Oct 1, 2021
@ProfEnergyHuber @DerClue Verhältnis von Spot- und Terminmarkt ist ein spannendes und nicht ganz einfaches Thema: Spot ist erstmal der einfacher zu verstehende Markt. Das, was dort passiert, ist für die Physik des Stromsystems relevant. Spot entscheidet über Einsatz der Erzeugungseinheiten (und Lasten)
@ProfEnergyHuber @DerClue Es wird allerdings nicht aller Strom, der in Deutschland verbraucht wird, am Spotmarkt gehandelt, aber vor allem die Mengen "at the margin". Dabei umfasst Spot nochmal die Segmente Day-Ahead (Auktionen) und Intra-Day(kontinuierlicher Handel)
@ProfEnergyHuber @DerClue Day-Ahead ist der "Hauptmarkt", u. a., weil basierend auf dessen Marktergebnis trad. Einsatzentscheidungen von klassischen Mittelllastkraftwerken getroffen wurden und weil basierend auf Marktergebnis Betriebsplanung der Netzbetreiber erfolgt.
Read 15 tweets

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