Norway's first new submarine cable to Denmark is 240 km long

Norway's hydropower makes up nearly half of Europe's energy storage capacity
.
European grid operators need to reserve electricity to cope with the instability of
wind power.
A new submarine cable closes the gap between supply and demand and better transports Norway's surplus hydropower to the European power system
.

The 240-kilometre submarine cable crosses the Strait of Skagerrak, which straddles southern Norway and northern Denmark
.
It was also Norway's first new submarine cable
to Denmark since 1993.
The submarine cable system, named Skagerrak Strait 4, has high-voltage direct current (HVDC) converters installed at both ends of the cable line to convert alternating current and direct current, and these devices also prepare
the wind power generation countries Germany and the United Kingdom to establish a power system connection with Norway.

Haakon Bogen, executive vice president of Norway's national grid operator Statnett, said that by pushing the most flexible form of high-voltage DC technology, voltage source converters (VSCs), to its highest voltage to date, the new 700 megawatts of capacity in Skagerrak Strait 4 advances plans to enable Norway to transmit electricity
to the UK and Germany.
For longer distances, Bogan said, the voltage needs to be boosted to reduce losses, such as the 720-kilometre cable connected to the UK, which will be the longest submarine cable
in the world.