Several initiatives have been undertaken in the past few years to increase the amount of renewable or other non hydrocarbon based energy inputs to the grid; the primary players in the initiative are nuclear, solar and wind. Nuclear has the advantage of very large power outputs and a more traditional interface with the existing electrical infrastructure. Nuclear power plants also operate in the same way as coal fired plants in that steam energy is used to turn turbine generators in a controlled fashion so that the electrical output is at a nominal frequency and voltage.