Controversial broadcaster Derryn Hinch has officially won a seat in Parliament, while the Greens are set to retain the balance of power, after Senate results were announced in Victoria.

It takes the total number of elected Senate crossbenchers to seven, with Pauline Hanson and others expected to join that list when results are declared in NSW and Queensland later this week.

Also elected to represent Victoria were five Liberal/National senators, four Labor senators and two Greens: the party's leader Richard Di Natale and Senator Janet Rice.

The left-wing party takes its total number of senators to seven, and should pick up at least one more in both Queensland and NSW, giving it a total of nine.