The Baltic Cable Asset
The Baltic Cable connects the transmission systems of Germany and Sweden through a submarine cable and an overhead-line, with a converter station located in each connecting country.
The Submarine HVDC Cable
The Baltic Cable is a High-voltage Direct Current (HVDC) submarine power cable. The cable, designed and manufactured by ABB High Voltage Cables, was laid in only two sections with a single sea joint and has subsequently been buried beneath the seabed.
The Converter Stations
The converter stations are located in Herrenwyk, Germany, and Kruseberg, Sweden and were delivered by ABB, now Hitachi Energy. The converter technology used is the Line Commutated Converter (LCC), equipped with water-cooled and air-insulated thyristor valves and state-of-the-art control systems. The switchyard incorporates alternating current (AC) and direct current (DC) filters to minimise harmonics and improve efficiency.
The Overhead Line
From the converter station in Kruseberg, Sweden, a 12 km long overhead line runs to Hermanstorp, and then connects to the submarine cable in Trelleborg. The overhead line has a total of 40 towers.
Security of Supply
HVDC and LCC technology used in the Baltic Cable assets is a proven, reliable technology with low energy losses. The total transmission losses are approximately 2.4 percent from the cable and converter stations combined. In addition to reliable and efficient power transmission, Baltic Cable can quickly support the Swedish or German grid with Emergency Power Control (EPC) if needed to help the electricity grids in a crisis.
To keep unplanned outages to a minimum, our whole asset system is constantly monitored.
By prioritizing preventative maintenance and employing advanced diagnostic techniques during the operational lifetime of HVDC LCC systems, Baltic Cable can ensure reliable and efficient power transmission for decades to come.
Jonas Brink
Technical Manager at Baltic Cable
