Abstract :
The Swedish electricity network comprises three levels: the national transmission grid, regional and local distribution. The national grid (400–220 kV), owned by Svenska Kraftnät, is about 15,000 km long. Three companies mostly own the 31000 km-long regional network (130–40 kV). The local network is owned by 180 network operators serving 6,500 high-voltage (10–130 kV) and 5.2 million low-voltage (400/230 V) customers. The local medium-voltage (10–20 kV) network comprises just over 120,000 km of overhead line and just over 63,000 km of underground cable. The low-voltage network has just over 100,000 km of overhead line and just less than 200,000 km of underground cable
