The Victorian state government expects the projects to result in A$220 million of investment in the state.
Acciona will develop and build the 66MW Mt Gellibrand site, with Windlab building the 13-turbine Kiata site.
The Victoria government said it would buy renewable energy certificates for its electricity use.
State minister for energy, environment and climate change Lily D'Ambrosio said: "We're proud to be rebuilding much needed confidence in the renewable energy industry following the neglect of Liberal governments at both state and federal levels over recent years."
Acciona Energia Oceania will begin construction of the site, 56km west of Geeling in southern Victoria, early next year, with completion expected in 2018.
"This is very positive news for the growth of Acciona in Victoria, where we already operate the 192MW Waubra wind farm and where we have a number of additional wind energy projects in development," Acciona Energy Oceania managing director Andrew Thomson said.
Mt Gellibrand will be Acciona's fourth Australian wind project. Including Waubra, Acciona also built the 64MW Cathedral Rocks site in South Australia state and the 46.5MW Gunning development in New South Wales.