Empezando el día con chispa. Tremendo petardazo de la S36 mientras hacia un test para un futuro vuelo de prueba a finales de mes.
Estas naves van cargadas de combustible hasta las cejas, sumado a los motores Raptors de ahí la gigante explosión. #SpaceX https://t.co/ZQzSqbHqlc
"What the Hell is Going On in Spain?"
At around half past eleven today, Spain and Portugal experienced an almost nationwide blackout.
Small parts of southern France were also briefly affected but reportedly regained power quite quickly.
The Portuguese grid operator currently attributes the likely cause to weather-related oscillations in power lines, which caused the grid to collapse.
At the time of the load shedding, Spain’s electricity supply was in a very fragile state: 70% of the electricity was generated by producers without grid-synchronous inertia.
Grid-synchronous inertia refers to turbines in nuclear, coal, gas, or hydroelectric power plants that drive the generators of these plants.
The rotational speed of these turbines is synchronized with the frequency of the power grid.
Thus, the grid frequency is directly linked to the rotational energy of the turbines.
If the frequency drops, it means that the load on the grid exceeds the output of the power plants connected to it.
In such a case, the rotational energy of the turbines is converted into electricity to stabilize the grid.
The valves on the turbines respond by opening further to support the grid.
The opposite situation can also occur: if there is excess generation, that energy is absorbed as rotational energy, and the turbine valves close accordingly to adjust to the new load.
Although the rotational energy compared to the grid’s power consumption is not large, it is sufficient to stabilize excessive load fluctuations or absorb surplus generation until the valves have time to react.
This principle of grid-synchronous rotating masses has been the foundation of our power grids for over 100 years, ensuring that at every moment exactly as much electricity is produced as is consumed.
Over the past two decades, Europe has been rapidly building power generation facilities that do not use grid-synchronous turbines, but instead produce direct current, which is converted to alternating current via inverters:
Wind and solar energy.
These inverters can generate high-quality alternating current, but they cannot replace the function of grid-synchronous inertia.
The more wind and solar power is integrated into the grid, the fewer conventional power plants with grid-synchronous turbines remain.
The fewer grid-synchronous turbines there are, the less inertia there is to buffer instantaneous fluctuations in load.
If there is insufficient buffering, even small fluctuations can quickly cause the grid frequency to deviate dangerously from the ideal value of 50 Hz.
Consumers and producers alike respond to this by disconnecting from the grid for self-protection, which can trigger a cascading collapse.
What exactly tipped the balance in Spain remains unclear.
However, we do know that the Spanish grid was in a highly volatile state at the time of the collapse.
Please note:
This text is an AI translation of my orginal German language Tweet.
The 10th anniversary of the #TheGameAwards delivered on its promise. It was well produced, had a lot of improvements and packed a bunch of surprises. Also grateful that everyone got time for their acceptance speeches. Well done @geoffkeighley and team!
🇪🇸 Imágenes que circulan en redes sociales en las que se observa a Pedro Sánchez, presidente del Gobierno español, siendo increpado por voluntarios y vecinos mientras abandona Paiporta, una de las localidades más afectadas por la catástrofe.
🇫🇷 Emmanuel Macron: "Tenemos que ser lúcidos. Europa no es ya la prioridad de EEUU. La prioridad de EEUU es EEUU, algo que es normal y justo. Su segunda prioridad es China, y para el resto depende del momento. [EEUU] son muy leales y fiables en Ucrania ¿durará? No lo sé.
Seamos claros, en Afganistán no recibimos un aviso. En el acuerdo de AUKUS tampoco recibí un aviso. No es un reproche, intento ser lúcido. La UE no es una prioridad de EEUU, y eso es parte de la llamada de atención que vivimos. Y es por eso que debemos cambiar nuestra estrategia de defensa y seguridad. Somos parte de la OTAN y aliado de EEUU, pero debemos reducir la dependencia de la agenda de EEUU".
Lo de que Aliexpress te mande NUEVE correos por cada pedido que haces es de locura.
- Order confirmed
- Order shipped
- Package in transit
- Package in your country or region
- Cleared customs
- Out for delivery
- Delivered
- Awaiting confirmation
- How did it go?
This was the moment apparent gunshots rang out at a Trump rally today. Trump put his hand to his right ear before he got on the ground.
When he stood back up, face bloodied, he gave a fist pump as Secret Service whisked him away. https://t.co/M8q6Uh35dy
Una prueba explosiva: durante una ignición de la primera etapa del cohete Tianlong 3 de la empresa privada china Space Pioneer (Tianbing) en la ciudad de Guoyi (Henan), un fallo de la plataforma de pruebas hizo que el cohete se desprendiese y saliese volando para caer a 1,5 km.