Electric red from Spain (REE) is exempt from any debt of the Blackout and points to the electricity for not fulfilling their obligation to regulate the voltage.
The system operator, who presented his own report on Wednesday about what happened on April 28, ensures that the operational program of the previous day -25 April – was adequate and sufficient to guarantee the stability of the network.
“Our technical analysis confirms that the dynamic voltage control program that was made on the 27th was sufficient,” says Concha Sánchez, general manager of Ree, during the presentation.
Next to her, the president of the operator, Beatriz Corredor, said they were that they were conventional generation groups – that, the electric businesses- those who did not respond as they owed to the voltage conditions.
Sanchez was even more explicit: “We did all our analysis studies after the starting point that the rest of the topics of the system will fulfill their functions.”
Ree also claims to have simulations that show that, If the electricity had fulfilled their obligation to tension scheme, the system would not have collapsed. “Even adding a more combined cycle to the operation of the 28th would have been the same,” said Sánchez.
Beatriz Corredor He threw another arrow To electric companies in the presentation of their report. According to the President Van Ree, she asked data to other agents of the electrical system in addition to her own information, “When they have facilitated them, which has not always been, they have specified their confidential character” and “partially”.
The statements of the system operator take place a day after the third vice -president, Sara Aagesen, the responsibilities of the Black -Out between Ree and the Electric, distributed, pointing the “bad planning” of the system operator on the 27th in the first case.
Despite everything, Beatriz Corredor defended on Wednesday that the report was drawn up by Red Electrica – which is “forced” – “is compatible with that of the government” and that, moreover, “it supplements.”
The ‘guilty’ according to Ree
The analysis focuses on what happened after 12:00 on April 28, despite the fact that the government acknowledged in its report Instability from 9:00 am.
According to the operator, “The available data show that neither were neither relevant nor were the origin of what happened after“.” From this principle, the report can be consulted on the Red Eléctrica webs Before 12:03 pm the system was in permitted voltage values And frequency, “Corredor said.
From that moment on, the operator describes the succession of “different relevant events that have led to the collapse of the system”: two “forced” oscillations, that is, caused by possible internal anomalies of A photovoltaic plant in Badajoz and “Three events for events loss for incorrect recordings.”
In the Fotovoltaic factory of Badajoz, the general director of Ree assured that the photovoltaïschens who were at the same location “did not present that behavior” and that “it is not the first time we have observed something like that.”
Although the deer claims to have data about what happened in that installation, Concha Sánchez was that “It may be due to a problem in the internal controls of the plant“
According to the system operator, the incident was not due to failure failure or in the absence of slowness, but to an imbalance of reactive force caused by the unnecessary decoupling of some power station.
In its report Ree ensures that the programming for that day was carried out in accordance with the current regulations, based on the principle that all agents would comply with their technical benefits.
However, he states that some plants were disconnected without having reached the voltage thresholds that justify this action, whereby the operational procedure 1.1 and the TED/749/2020 order violate.
In addition, Ree accuses the generating groups that are subject to the PO 7.4 procedure of non -absorbing the reactive energy to which they were obliged.
He also claimed that his own equipment, such as reactions and capacitors, worked wellBut because they are static elements, “they cannot replace the dynamic check that must exercise conventional plants.”
The report too Throw away frequency or slowness problems. “The system had sufficient slowness, according to Etso-E recommendations, and with reservations thanks to the programming for technical limitations,” they say.
As for the Interconnection with France Ree defended the activation of the “regular force” mode in the HVDC -LinkDie Santa Llogaia (Spain) unites with Baixas (France), a “usual maneuver to pillows”, and emphasized the key role that played in the subsequent recovery of the system.
Finally Ree defended that Transport network defense systems and freight displays worked as planned. However, he acknowledged that these tools are unable to isolate an incident of these characteristics and said it contains no data about the actions performed in the distribution network.
