Beatriz Corredor, president of the Spanish grid operator Red Eléctrica de España (Ree), said that an error in a PV factory in Badajoz, Spain, a forced frequency oscillation led to a recent black -out. She said that the plant is ‘perfectly identified’.
Redeia, the parent company Van Ree, held a press conference in Madrid this week to present his report on the power outage of 28 April that left millions without electricity in Spain. Ree -President Beatriz Corredor denied that Ree was responsible, only a few hours after the Spanish government blamed the incident of poor planning by the system operator.
Ree attributed the beginning of the Black -out to a “malfunction” in a PV factory in Badajoz. It refused to reveal further details due to “confidentiality” reasons. The factory is said to have caused a “forced frequency scilling”.
Ree General Director of Operations Concha Sánchez said that the incident started at 12:03 pm (CEST), when the system “started to experience a forced frequency oscillation that” led a fall in tension “and a” very important “fluctuation of almost five minutes. She said the immediate action by France changed the” Dangered action “changed” Conditions “Due to” circumstances changed “Dangerous action” changed “Conditions” Due to “circumstances changed” Dangant action “changed” Conditions “Due to” circumstances. Fixed Setpoint, in accordance with the French system operator RTE.
Later Ree said that it was a “significant” disruption on a streamline in Badajoz and reduced the electricity exchange with Portugal. The oscillation returned at 12:16 pm, it said. It originated in a “photovoltaic plant that we will mention in the province of Badajoz”, “connected to the transmission network.” Sánchez said that the oscillation was “unambiguously” the result of defective internal controls in the factory, a problem “that the owner must be clarified.”
The abnormal fluctuations led to the disconnection of 700 MW generation, mainly from small facilities outside the visibility of deer, including self-consumption plants.
Then the export flows “reduced”, tensions continued to rise and a substation in Granada experienced a generation trip. Decupping continued, including another 582 MW in Badajoz. If the transmissionerter had lost more than 2,000 MW and “a considerable volume” on distribution networks, the system could no longer maintain voltage levels.
Sánchez said that until that point we “cannot speak of spans”, and noticed that voltage levels remained within the regulating limits. She also stated that some generators are not complying with the obligations of voltage management. “They have to offer this service,” she said. According to Ree -Simulations, the Black -out could have been avoided if generators had delivered the required voltage check because there was “sufficient” capacity available. “It is a different matter” whether the companies are obliged to actually provide the service, she added.
In a new report this week, the Spain’s Ecological Transition Ministry identified three main causes for system failure: insufficient voltage control capacity, fluctuations caused by schedules and generation -explanations that it described as “apparently inappropriate”. The ministry concluded that the tension was not regulated due to poor planning by the system operator, and different generators did not accept their obligations.
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