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Grid says solar is not responsible for the blackout in Spain, but Sanchez was pressed by Sanchez to explain it.

On Wednesday, Spain's grid operator denied that solar power was the cause of Spain's worst blackout in history. Prime Minister Pedro Sanchez is under increasing pressure to explain why it happened.

After a blackout which halted trains and airports, and trapped Spanish in lifts, life has returned to normal. Sanchez's critics blamed low investment for a system heavily reliant on intermittent solar power and wind.

Sanchez announced an investigation by the government and stated that he wanted answers from private companies who feed electricity into the grid. He said that he had not ruled out the possibility of a cyber-attack, although private companies and REE, a part-state owned grid operator, have dismissed this.

REE (headed by former Socialist Minister Beatriz Corredor) has pinpointed the cause of the outage as two separate incidents at substations located in southwest Spain. However, it's still too early to determine what caused the events.

Corredor, in an interview with Cadena SER radio on Wednesday, said that it was incorrect to blame the outage of Spain's high renewable energy share.

She said, "These technologies are stable and have systems which allow them to function as conventional generation systems without any safety concerns." She added that she was not contemplating resigning.

In an interview with a different reporter, she stated that the government had given a deadline for power companies to submit data by Wednesday afternoon which would help explain why things went wrong.

MALFUNCTIONING REE

Political opponents claimed that Sanchez took too long to explain a blackout and that he was trying to cover up the failures of REE.

In an interview with RTVE, Miguel Tellado said that since REE had ruled out a cyberattack and the company has a state investment, its leaders were appointed by the government.

Sanchez's announcement of a government investigation was rejected by Sanchez, who called for a separate independent investigation to take place.

The Spanish government has said that it asked for the "maximum transparency and collaboration" from private energy companies to identify the cause of this outage.

Ignacio Sanchez Galan said that REE should explain the cause of the blackout.

Antonio Turiel, a Spanish National Research Council (CSIC) energy expert, told Onda Vasca Radio on Tuesday that grid instability was the main problem.

He said that "a lot of renewable energy was integrated without the responsive stabilisation system that should have existed", adding that vulnerabilities were caused by "the unplanned, haphazard integration" of a variety of renewable systems.

Through 2030, the government anticipates that private and public investments of 52 billion euro will be made to upgrade the electricity grid in order to handle the demand surge from data centres and electrical vehicles. Aelec, a utility lobby, says that's not enough. (Reporting and writing by David Latona in Madrid, Pietro Lombardi)

(source: Reuters)