Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Carlos E.R." Newsgroups: comp.os.linux.misc Subject: Re: OT: The real story of the Iberian blackout Date: Tue, 30 Sep 2025 19:11:52 +0200 Lines: 66 Message-ID: References: <10bejip$35i1j$7@dont-email.me> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: individual.net Fw+m5qxBpYoLhNyWxcoiwg7P7Ve++mnKYZF+JRK1T9D5F3EmTr X-Orig-Path: Telcontar.valinor!not-for-mail Cancel-Lock: sha1:msbES+OQP7JkgKBoqz7CKqivT/8= sha256:QKMSfg+9S7OpHZzXeONZ42ja/ey0VohCqDYETHNp1Eg= User-Agent: Mozilla Thunderbird Content-Language: es-ES, en-CA In-Reply-To: <10bejip$35i1j$7@dont-email.me> Xref: csiph.com comp.os.linux.misc:75475 On 2025-09-29 20:36, The Natural Philosopher wrote: > https://www.youtube.com/watch?v=MzCiEHGVMwA You could instead read this one. Known bias. "This is the report paid for by Iberdrola and Endesa. Coincidentally, it was presented three days before the official ENTSOe report." No blame on renewables. The IIT presents a preliminary report analysing the causes of last April's blackout 29 September 2025 Large voltage fluctuations, low synchronous generation and a weak transmission network are some of the causes The Institute for Technological Research (IIT) at Comillas Pontifical University—one of Europe's leading electrical systems research centres—has today published an independent preliminary report analysing the causes of the blackout that left the Iberian Peninsula without power on 28 April. The document, prepared by professors Luis Rouco, Enrique Lobato and Francisco M. Echavarren, concludes that the blackout was the result of a combination of voltage instability in the previous days, insufficient synchronous generation, an insufficient safety margin against overvoltage collapse and a weak transmission network, aggravated by the disconnection of renewable generation and operational manoeuvres that reduced the safety margin. The analysis reveals that synchronous generation (mainly combined cycle and nuclear power plants) in the southern and central areas was unusually low, with only one combined cycle plant in Andalusia and one nuclear plant in the centre. In addition, more than a third of the 400 kV grid was disconnected for maintenance or voltage control, leading to poorly damped oscillations. The report introduces the concept of ‘overvoltage collapse’, a phenomenon unprecedented in Europe, where voltage increases uncontrollably when renewable generation is disconnected. It adds that the cascading overvoltage that occurred is unprecedented in the European electricity system. The researchers also emphasise that the manoeuvres carried out by Red Eléctrica de España between 12:00 and 12:30 —connecting lines to try to dampen the oscillations— further reduced the safety margin, accelerating the collapse of the system. The IIT recommends reviewing the criteria for synchronous generation scheduling and voltage control procedures, especially in scenarios of high renewable penetration, and urges the use of more advanced metrics to anticipate risk situations. The report also highlights the importance of strengthening coordination between the various players in the electricity sector and adapting the operation of the system to the new challenges of the energy transition, with the massive integration of renewables. Translated with DeepL.com (free version) -- Cheers, Carlos. ES🇪🇸, EU🇪🇺;