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In St John's Wood in north London an electricity substation is on fire. It is similar to the one that brought Heathrow Airport to a halt.

The fire began at 5.30 am & 100 firefighters are fighting the blaze.

Commuters are facing major disruption on trams in and around Manchester city centre due to a power outage.

A problem with overhead lines has completely suspended services on the Ashton line, while others are running buses between stops.

Runkel kirjutas: ↑29 Apr, 2025 17:35 Vaata akf rugeri lisatud graafikut ülal. Kus on seal see äkiline ootamatu ületootmine?
Kõik kulges vastavalt prognoosile, kuid siis juhtus 15 gigavatine võimsuse kadu, mis kestis 5 sekundit. ...

OLAVI kirjutas: ↑29 Apr, 2025 18:08

Runkel kirjutas: ↑29 Apr, 2025 17:35 Vaata akf rugeri lisatud graafikut ülal. Kus on seal see äkiline ootamatu ületootmine?
Kõik kulges vastavalt prognoosile, kuid siis juhtus 15 gigavatine võimsuse kadu, mis kestis 5 sekundit. ...

See ülaltoodud graafik on 15min intervalliga aga automaatsed pinge- ja sageduskaitsed rakenduvad 1/100 sek ehk ühe poolperioodi jooksul.
Elektrikvaliteedi kontrollseadmetega on varustatud kõik kaasaegsed sagedusmuundurid, asugu nad siis kas elektrijaamas, kliimaseadmes, liftis, pumbajaamas, tööpinkides, jne.
5sek jooksul toimub võrgus 500 poolperioodi ja tagant järgi on 5sek logiintervalliga väga raske hinnata, et "milline saeketta hammas esimesena lõikas".

Kui tehakse tuuletu ilmaga süüdlaseks kõrgepingeliin, siis saab ka terrorismi süüdistada, sest drooniga saab kergelt lühistava traadi üle õhuliini juhtmete vedada.

Runkel kirjutas: ↑29 Apr, 2025 18:13

OLAVI kirjutas: ↑29 Apr, 2025 18:08

Runkel kirjutas: ↑29 Apr, 2025 17:35 Vaata akf rugeri lisatud graafikut ülal. Kus on seal see äkiline ootamatu ületootmine?
Kõik kulges vastavalt prognoosile, kuid siis juhtus 15 gigavatine võimsuse kadu, mis kestis 5 sekundit. ...

See ülaltoodud graafik on 15min intervalliga aga automaatsed pinge- ja sageduskaitsed rakenduvad 1/100 sek ehk ühe poolperioodi jooksul.
Elektrikvaliteedi kontrollseadmetega on varustatud kõik kaasaegsed sagedusmuundurid, asugu nad siis kas elektrijaamas, kliimaseadmes, liftis, pumbajaamas, tööpinkides, jne.
5sek jooksul toimub võrgus 500 poolperioodi ja tagant järgi on 5sek logiintervalliga väga raske hinnata, et "milline saeketta hammas esimesena lõikas".

Kui tehakse tuuletu ilmaga süüdlaseks kõrgepingeliin, siis saab ka terrorismi süüdistada, sest drooniga saab kergelt lühistava traadi üle õhuliini juhtmete vedada.

Mis sinu arvamus on, mis võis või üldse sai sellise hullu võimsuse kukkumise põhjustada? Sa soovid ilmselt päikeseparke süüdistada, aga ikkagi...

Let's call it:

The first big blackout of the green electricity era

(Below my notes from the conference call the Spanish grid operator held earlier today with reporters. I added extra information from my initial post, and corrected a location: it was the south-west).

Of course, important to note that there were many -- really, many -- blackouts during the "fossil fuel electricity era," when coal-fired power plants were the backbone of the grid. Lesson would be learnt of what happened in Spain, and grids will be hardened everywhere.

Runkel kirjutas: ↑29 Apr, 2025 20:33 ...
2. Miks päikesepargid toodangus pausi tegid, ei ole selge.

...

Today the Telegraph reported unusual activities detected in the UK grid with unexpected frequency swings just hours before Spain went dark.

Starts to sound like possibile SCADA-based attack that failed in the UK but succeeded in Spain.

Britain’s electricity grid operator is investigating unexplained power plant failures that hit the UK’s system hours before Spain and Portugal were plunged into blackouts.

Control room staff at the National Energy System Operator (Neso) observed unusual activity on Sunday that saw the power frequency shift unexpectedly in the early morning and the evening.

Keeping the frequency of the electricity system within certain limits is vital to keeping the lights on.

The first event began at around 2am with a power failure at the Keadby 2 gas-fired power plant in Lincolnshire, followed by the unexplained failure of the Viking Link interconnector between the UK and Denmark.

At around 6pm, the frequency shifted unexpectedly again – with the cause currently unknown.

Neso, the quango that manages the British grid, confirmed to The Telegraph on Tuesday morning that officials were investigating.

But it comes as grid stability is being closely scrutinised across Europe, with Spain and Portugal currently in the process of painstakingly re-activating their grids following the unprecedented loss of power nationwide.

Pedro Sánchez, the prime minister of Spain, refused to speculate on the suspected cause in a press conference late on Monday.

An earlier suggestion by Portuguese officials that the blackouts may have been triggered by a freak weather event have since been downplayed, leaving the events that led to Europe’s worst electricity failure in decades shrouded in mystery.

Meanwhile, Jordi Sevilla, the former president of Spain’s national grid operator, Red Eléctrica, suggested on Tuesday that the loss of power was indirectly caused by Spain’s heavy reliance on solar and wind farms.

In an editorial for financial newspaper Cinco Días, Mr Sevilla said the rising dependence on renewables that did not generate so-called inertia, which helped to stabilise the frequency of electricity systems, created “obvious” problems that had been ignored by politicians.

“Our electricity grid requires investment to adapt to the technical reality of the new generation mix,” he said, according to translated text.

The unexpected power issues in Britain on Sunday were of a much smaller magnitude but have still spooked officials.

Market transparency data show Keadby 2 was scheduled to come online on Sunday morning to help meet high power demand in the morning, but it is understood it tripped at around 2am.

The Viking interconnector was expected to provide power to the grid but also suffered a sudden fault just after this.

According to market data published by Elexon, the cable was providing 236 megawatts of power to the British grid at 2am before the output suddenly fell to zero and remained at that level until about 11am.

This is unusual because the cable will usually follow power prices – unless the Neso intervenes – meaning it tends to be either exporting or importing at least some power most of the time.

It is understood that the problem may have been caused by a fault on the Danish side.

Officials are also investigating the unexpected frequency change at 6pm, but it is understood that no specific power issues have been linked to that currently.

On Tuesday, a Neso spokesman said: “As a prudent system operator we review all generator trips and events on our network as standard practice.

“We are still reviewing operational events across the weekend. However, it is highly unlikely that these events are connected to each other or related to the events on the European electricity network on Monday.

“Great Britain’s electricity network was not affected by the power system incident on the European electricity network on Monday.

“We are working closely with our counterparts across Europe to understand the cause of today’s power system incident and to offer our support. It is too early to comment further on today’s events and whilst investigations are still ongoing.”

SPAIN BLACKOUTS: AN ANONYMOUS EXPERT VIEW

From a deep groupchat, last night, translated from Spanish, written by an expert in transmission and distribution of power. Not my words.

"What has happened on April 28 has a well-located origin: the Aragón-Catalonia corridor, which is one of the most important electric highways in Spain. There is not only the electricity produced by our solar and wind farms in the northeast, but also the electricity that we import from France. This international interconnection, although weak (it can only contribute 3% of our demand, well below the minimum of 10% that marks the EU), in times of stress is essential to balance the network.

At 12:32 p.m., in that Aragón-Catalonia corridor there was an electric shock. What exactly does "shake" mean? It means that suddenly and abnormally, the power that flowed through those lines began to vary violently, rising and falling in a very short time. Such abrupt variability can be due to three main causes:

1. That a relay or transformer on that electric highway detects an abnormal flow of current or voltage (higher or lower than expected) and automatically disconnected to avoid burning or destroyed. This is called that "opens" a relay or switch: it jumps and cuts the passage of electricity to protect itself.

2. That the enormous concentration of renewable energy in that area (mainly solar and wind) has created an electrical resonance: electronic inverters, which synchronize current, can sometimes be amplified between them if a small voltage alteration (for example, due to clouds, strong wind or a slight failure) extends like an echo to all devices, causing widespread oscillations.

3. That a wrong control order has been sent (by mistake or attack) from the SCADA systems, disconnecting or reducing the generation of multiple hit plants. There is no confirmation of this possibility yet, but it is being investigated.

What is known is that as a consequence of that shake, the interconnection with France jumped: we were isolated just at the worst time, when the peninsula needed external support to stabilize.

Without that French help, the frequency of the peninsular network (which should always be 50 Hz exact) began to drop quickly. The frequency is like the heartbeat of the network: if it falls too much, the systems understand that the patient (the network) is collapsing and automatically disconnected so as not to self-destruct. Thus, in just five seconds, the solar and wind farms were turned off —very sensitive to frequency variations—, 15 GW of power was lost suddenly (60% of all the electricity generated at that time), and the network could not take it anymore: it was It collapsed completely, showing the Redeia Platform (REE) a "0 MW" nationwide. That does not mean that all the turbines were physically turned off, but there was no generator synchronized at the common frequency of 50 Hz. It was, for practical purposes, a country off.

To ignite a completely dead network again, one essential thing is needed: plants that can start in black, that is, without receiving energy from anywhere else. Spain has identified five large hydroelectric jumps capable of doing this. However, and here is one of the great negligences that are coming to light, three of those five groups were stopped in scheduled maintenance, by business decision supervised by the administration. Only two were operational. That made the recovery much slower and weaker than it should be in a normal contingency plan.

The result is that, after almost 10 hours, only 35% to 40% of the national supply has been recovered, and there are still large areas in the dark or under scheduled cuts.

The situation reveals a very serious underlying problem:

Spain is still an energy island: it only has 3% foreign exchange capacity compared to its total demand."...

"The network depends a lot on variable renewables, which are disconnected quickly in the face of any instability.

The lack of physical inertia reserves (i.e. large rotating masses such as thermal power plants or classic hydraulics) prevents the disturbances from damping.

And poor maintenance planning left without enough hydraulic muscle to respond to a crisis.

The most likely causes, with current data, are:

A combination of technical failure in protection or in synchronization, added to a serious lack of operational forecast and maintenance (probability ≈ 40%).

The possibility of an intentional cyber-physical attack remains in analysis (≈ 25% estimated probability).

Other factors such as human error, punctual atmospheric phenomenon or mixed causes complete the rest.

In short: an initial shake at the most sensitive point of the Spanish network —the Aragón-Catalonia corridor, door to Europe— left the peninsula isolated and vulnerable. The network could not sustain its own demand because it did not have sufficient assistance, nor stable physical reserve, nor enough bootable plants in black. Three of five hydroelectric jumps were out of service when they were most needed.

For this reason, Spain went out in five seconds, and that is why it still continues to light little by little, fragile, slow and exposed."

Kilo Tango kirjutas: ↑29 Apr, 2025 21:25

Runkel kirjutas: ↑29 Apr, 2025 20:33 ...
2. Miks päikesepargid toodangus pausi tegid, ei ole selge.

...

Allikat ei lugenud, aga pakun, et odavad inverterid on asja taga. Neil on kombeks pistik seinast tõmmata, kui sagedus väljub etteantud piiridest.

ruger kirjutas: ↑29 Apr, 2025 21:52 Võimaliku küberrünnakut ei saa ka välistada.

Today the Telegraph reported unusual activities detected in the UK grid with unexpected frequency swings just hours before Spain went dark.

Starts to sound like possibile SCADA-based attack that failed in the UK but succeeded in Spain.

https://x.com/akihheikkinen/status/1917270626328314229

UK-s toimunud ootamatud põlengud alajaamades võivad ka seose saada.
Britid leidsid oma võrgus kahtlaseid tegevusi. ...

Runkel kirjutas: ↑29 Apr, 2025 17:35 Vaata akf rugeri lisatud graafikut ülal. Kus on seal see äkiline ootamatu ületootmine? Kõik kulges vastavalt prognoosile, kuid siis juhtus 15 gigavatine võimsuse kadu, mis kestis 5 sekundit. See vallandas ilmselt ahelreaktsiooni ja süsteemi osad hakkasid ennast välja lülitama, süsteem lülitus ka Prantsusmaalt välja. Süsteem sai kiiresti ülesse tänu Marokole ja Prantsusmaa abile ehk ühendustele ning kiirele tootmisevõimsuse taastamisele võrku - kiirelt saab seda teha paikese ja tuulejaamadega. Tuuma- ja söejaamad vajavad restardiks aega.
Kui Eestisse panna püsti 1 GW tuumajaam (mis toodaks pool tipukoormusest) ja see rikke tõttu otsad annaks, siis võiks see olla Hispaania sarnase efektiga, et ca pool võimsusest haihtub.
Blackouti põhjuste uurimine kestab, ma ei välistaks ikka ka välist vaenulikku sekkumist nagu Mart Raudsaar PM-is. Seda ka seetõttu, et võrgu kokkukukkumisele on järgnenud massiivne väärinfokampaania, millest hoiatas ka Hispaania peaminister. Näeb välja justkui teatud muster.

Kanaari saarestikku kuuluval La Palmal jäi täna ennelõunal elektrita mitukümmend tuhat inimest.

Elektrita jäi eelkõige mitu saare põhjaosa asulat. Radio Canaria teatel mõjutas kohaliku aja järgi kella 10 paiku hommikul alanud elektrikatkestus ligikaudu 30 000 inimest. Mitmes piirkonnas on suudetud ühendus juba ka taastada, vahendas ABC.

Praeguseks pole veel teada, mis võis katkestuse põhjustada. Kohalikud ametnikud viitavad võimalikule probleemile Los Guinchose elektrijaamas.​

Spain has been hit by another power outage, just days after a massive blackout affected much of the country. This time, the blackout struck La Palma in the Canary Islands, leaving tens of thousands without electricity in the island’s northern towns and cities. Authorities suspect the issue may have originated at the Los Guinchos power station, but the exact cause remains unclear.

The earlier nationwide blackout on April 28 had brought chaos to Spain, Portugal, and parts of France. Traffic signals failed, causing road congestion, while airports, hospitals, and train services were disrupted. Officials blamed that outage on a rare atmospheric phenomenon.

ruger kirjutas: ↑08 Mai, 2025 18:56 Kanaari saared jäid ka osaliselt ilma elektrita

Kanaari saarestikku kuuluval La Palmal jäi täna ennelõunal elektrita mitukümmend tuhat inimest.

Elektrita jäi eelkõige mitu saare põhjaosa asulat. Radio Canaria teatel mõjutas kohaliku aja järgi kella 10 paiku hommikul alanud elektrikatkestus ligikaudu 30 000 inimest. Mitmes piirkonnas on suudetud ühendus juba ka taastada, vahendas ABC.

Praeguseks pole veel teada, mis võis katkestuse põhjustada. Kohalikud ametnikud viitavad võimalikule probleemile Los Guinchose elektrijaamas.​

https://maailm.postimees.ee/8245106/kan ... ikatkestus

Spain has been hit by another power outage, just days after a massive blackout affected much of the country. This time, the blackout struck La Palma in the Canary Islands, leaving tens of thousands without electricity in the island’s northern towns and cities. Authorities suspect the issue may have originated at the Los Guinchos power station, but the exact cause remains unclear.

The earlier nationwide blackout on April 28 had brought chaos to Spain, Portugal, and parts of France. Traffic signals failed, causing road congestion, while airports, hospitals, and train services were disrupted. Officials blamed that outage on a rare atmospheric phenomenon.

https://x.com/PhoenixCNE_News/status/19 ... 5943615933

All major mobile networks went down in Spain on Tuesday, just four weeks after the country was hit by a national power outage.

Movistar, Orange, Vodafone, Digimobil and O2 were all reported to have been affected by outages hitting professional services, including health centres.

Complaints soared as landline, internet and emergency contact services were knocked offline early this morning.

Madrid, Andalucía, Galicia, the Basque Country, Aragon, Navarra, Extremadura and the Valencian Community were all reportedly affected.

Networks contracted with Telefónica appeared to have been hit, but outages did not appear to be affecting individuals' network access.