Overvoltage protection was triggered, disconnecting a series of power plants from the grid in the seconds before Spain and Portugal lost power in April. The core problem was the lack of requirements for voltage control, according to a new report

El apagón eléctrico total registrado en España y Portugal el pasado 28 de abril fue un evento único en el mundo y se debió a una "cascada de sobrevoltaje".

Overvoltage protection was triggered, disconnecting a series of power plants from the grid in the seconds before Spain and Portugal lost power in April. The core problem was the…