Three Qatari state-backed entities, including the Gulf nation's acquisitive sovereign wealth fund, are setting up a $1 billion fund to invest in overseas energy infrastructure assets.

The new fund will be run by Qatar Holding, Qatar Petroleum International (QPI) and Qatar Electricity and Water Company (QEWC), a bourse filing from QEWC said on Monday.

Qatar, with one of the highest per capita incomes in the world and backed by its huge hydrocarbon wealth, has been snapping up assets globally.

The fund will invest outside Qatar "in the fields of power generation, water desalination and treatment, heating and cooling systems, provision of fuel as well as fuel loading and unloading equipment," QEWC said in the statement.

The new company, to be called Nebras Power, will be 60 percent owned by QEWC, with 20 percent held by QPI and 20 percent by Qatar Holding, a separate statement issued later on Monday said.

"Its initial capital will be $1 billion, with the idea to provide power outside Qatar," Qatari Energy Minister Mohammed Saleh al-Sada told a news conference.