Generator external power supply (output) method:
Simply put, it is through the stator winding output, the general power plant generator issued by the voltage of 1-20,000 volts, the need to go through the step-up transformer to the corresponding transmission voltage (35,000 volts -500,000 volts), of course, must be connected to the grid, in fact, the system is to transmit power through the dynamic changes in voltage and frequency, because the charge is always moves in the direction of lower potential. The voltage and frequency in the grid are in a dynamic equilibrium, varying very slightly, but changing all the time. A generator can only supply power to a load if it is connected to the system and forms a circuit with the load. In principle, the dispatch system has full control of all generators on the grid, and arranges generation and transmission according to changes in load, and the condition of the equipment.
Generators are other forms of energy into electrical energy mechanical equipment, it is driven by the water turbine, steam turbine, diesel engine or other power machinery, water flow, air flow, fuel combustion or atomic fission of the energy generated by the mechanical energy to the generator, and then converted by the generator into electrical energy. Generators have a wide range of uses in industrial and agricultural production, national defense, science and technology and daily life.