Example

#Branches
#"variant" "num" "bus1" "bus2" "p1 (MW)" "p2 (MW)" "q1 (MVar)" "q2 (MVar)"
1 1 -1 -1 -100.000 -200.000 -110.000 -120.000
1 4 -1 -1 -100.000 -200.000 -110.000 -120.000