COBRAcable proves to be a great success

06.03.2020

It is now half a year since TSCNET customer Energinet, the transmission system operator (TSO) from Denmark, and TSCNET shareholder TenneT, the Dutch-German TSO, made COBRAcable available to the market. The high-voltage DC cable with a length of about 325km and a capacity of 700MW is the first direct connection between the electricity markets of Denmark and the Netherlands. The basic idea behind COBRAcable is to compensate for the volatility of wind power. Consequently, the Netherlands imports electricity via the cable on days with large Danish wind power generation, while on days with little wind in Denmark the electricity is transported in the opposite direction.

This works perfectly, as the interconnector’s transmission data from the first six-month period prove: In total, Denmark has imported almost 700GWh via the COBRAcable and the Netherlands almost 1,400GWh. On average, COBRAcable was operated at full capacity 79% of the time during the last half year. The impressive traffic on this binational connection proves its adequacy through its operation. The new interconnector therefore substantially contributes to the energy transition by exchanging volatile renewable energy across borders and additionally creates a trading profit on the spot market for electricity – a multiple benefit for nature, society and the companies involved.

The transmission data from the COBRAcable of Energinet and TenneT confirm a high level of traffic on the line (picture: screenshot taken from Energinet-video “Constructing the green COBRAcable”, Vimeo)

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> See Energinet press release (html)