WHAT IS A POWER PLANT? Power plants are industrial units that are used for the generation of electric power. Sometimes it is also called as energy center because of the work it does. In short, it converts one form of the energy into another. These power plants contain a generator that converts mechanical energy in to electrical energy due to the motion of a conductor in a magnetic field. The energy source is source used in these power plants is of various types such as coal, water; wind, solar is several others. Here are some of the largest power plants. THREE GORGES, CHINA The three Gorges dam of China s the largest power plant in the world. It is a hydroelectric river dam situated on the Yangtze river.