Currently commonly used power generation methods include thermal power generation, hydroelectric power generation, wind power generation, and nuclear power generation;
Energy transfer and conversion process of hydroelectric power generation is as follows: the gravitational potential energy of water is converted into the kinetic energy of water and then pushed. The rotation of the generator wheel is converted into mechanical energy by the generator wheel, which is then converted into electrical energy by the generator.
So the answer is: firepower; the gravitational potential energy of water; the mechanical energy of the generator turbine;