The closure of Australia's largest coal-fired power plant could be brought forward as Origin Energy assesses a "range of scenarios", including the impact of climate change and the influx of renewable energy, which could influence the timing.

After pushing back against a move by shareholder activists last year to bring forward the 2032 shutdown of the Eraring black coal-fired generator in New South Wales by two years, Origin Energy on Thursday indicated it remained open to retiring the facility or winding it down in a staged approach sooner than 2032.

Origin Energy CEO Frank Calabria. Credit:Louie Douvis

Origin Energy chief executive Frank Calabria, when asked about the future of the 2880-megawatt plant, said the energy market was "moving rapidly" and the facility was subject to continual review.

The company was considering "various scenarios" in assessing the plant's future, he said, which factored in the economics of running the plant and the impact of global warming in the wake of this summer's devastating bushfire season.