wiredInUSA July 2019

Progress on synchronization

Combined connections

Image: NKT

NKT has successfully commissioned the 170kVHVACcablesystemfor thecombined grid solution connecting the wind farms Kriegers Flak and Baltic 2. The Kriegers Flak Combined Grid has been developed by the national grid operators Energinet in Denmark and 50Hertz in Germany. NKT supplied the high-voltage cable systems for the project to connect the Danish region of Zealand with the German state of Mecklenburg-Western Pomerania, via the two offshore wind farms in the Baltic Sea. When fully operational the Kriegers Flak Combined Grid will provide an important contribution to the national targets of renewable energy as well as the EU target of reaching a share of 32 percent renewable energy by 2030. NKT is also providing the 220kV HVAC cable system to connect the 600MW Danish Kriegers Flak wind farm to the onshore power grid in Denmark, expected to be taken into operation later this year. The Kriegers Flak Combined Grid solution has been categorized as a Project of Common Interest (PCI) by the European commission as it contributes to the development of the interconnected power grid needed to create a unified energy market in Europe.

As three Baltic countries prepare to synchronize their power grids with the continental European system, their connection agreement has come into force. Operators in Poland, Lithuania, Latvia and Estonia and supporting parties have signed an agreement for a future synchronous interconnection of the power system of the Baltic states and the power system of continental Europe. Lithuania already meets 169 of the 409 requirements laid down in the “catalogue of measures”, and Latvia and Estonia are in a similar position. The first stage of the synchronization project calls for upgrading and reinforcing the Baltic countries’ domestic electricity networks by 2021. The second stage involves increasing the capacity of the LitPol Link interconnection between Lithuania and Poland, building nine synchronous compensators in the Baltic countries, and carryingout a joint test of isolation operation of the system. The third stage, expected to be completed by 2025, includes the development of Harmony Link, a new submarine cable between Lithuania and Poland. Lithuanian energy minister Zygimantas Vaiciunas

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wiredInUSA - July 2019