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Power outage in two significant interconnectors: Cobra cable and REMO 2

By: Rameeza Haq Duggal 14/09/2020 4C Offshore

Cables General Interconnectors

Power supply has resumed for two unrelated subsea electricity interconnectors following repairs to their respective transmission systems. Red Eléctrica de España (REE) and its Moroccan counterpart Office National De L'electricite Et De L'eau Potable (ONEE) completed the repair work of reserve cable (number 4) of the submarine cable between Spain and Morocco (REMO 2) on 4 September 2020.

On 31 July 2020, a fluid leak was found in the reserve cable (number 4) of REMO 2. Later, the fault was detected in Moroccan waters, 21.6 km off the Spanish coast and 208 meters deep. A cable laying ship, EDT Hercules carried out the repair work. Since the damaged cable was out of service, the electricity supply was not compromised at any time, thanks to its double circuit system. It was only switched off for a few hours, during the sealing process.

The Spain- Morocco interconnection includes two 400 kV lines, commissioned in 1997 and 2006, consisting seven cables: three for each circuit, plus one for reserve. All the seven cables run from Tarifa terminal station at the Spanish end to Fardioua terminal station at the Moroccan end.

Meanwhile, remedial works on the converter station of Cobra cable were completed on 12 August 2020 after a fault was detected the day before. The 700 MW interconnector runs between Netherlands and Denmark and was commissioned in 2019.

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Power outage in two significant interconnectors: Cobra cable and REMO 2

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