Operation
Because this overhead line can generate radio interference, there is a highly effective active filter system installed at the Kruseberg converter station. In the Lübeck-Herrenwyk converter station, there is no requirement for such a system, because there is no overhead powerline section on the German side.
The cable cannot be operated at the maximum transmission rating of 600 megawatts, because the 380 kV line which begins at the converter station of Lübeck-Herrenwyk ends at the Lübeck-Siems substation. This is the only 380 kV powerline in Germany, which has no direct connection to the Central European 380 kV grid, which causes Baltic Cable to use 372 Megawatts (MW) capacity instead of 600 MW. From there power flows on 220 kV and 110 kV lines, which reduces the maximum transmission rate and increases the losses of the transmission.
In the area of the converter station there is also a 110 kV/220 kV sub-station, fed by two 110 kV circuits from the Lübeck-Siems sub-station. There is no transformer for coupling the 380 kV- and the 110 kV-grid in the area of the Lübeck-Herrenwyk converter station.
Read more about this topic: Baltic Cable
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