Electricity generated by Australia's highly polluting brown coal power plants has fallen 14 per cent since introduction of the carbon price, while renewable power has soared.

An analysis by the federal government, comparing daily national electricity market data for the first nine months of the carbon price with the same period a year earlier, also shows generation from slightly less polluting black coal power plants fell 4.7 per cent.

In the same time renewable energy - including hydro - rose by 28 per cent, while lower-emitting gas power grew by 9.5 per cent.

Labor credits the decline in coal electricity in large part to its carbon price and other policies such as a 20 per cent renewable energy target. The carbon price began on July 1, 2012 at a fixed price of $23 a tonne. Those in the industry and analysts say the carbon price is playing a role but other factors at work include changing fuels costs and falling power demand.