There are approximately two types of hydroelectric power plants. One is hydraulic type, which means building a dam to raise the height of the water. Under the action of hydraulic pressure, water enters the lower inlet culvert, drives the turbine blades, and drives the hydroelectric power plants. the generator to produce electricity, the higher the water height of this hydroelectric plant, the greater the electricity production. The other type is a tubular hydroelectric plant, which places the turbine and generator horizontally in the flow of a river like an airplane engine, and uses the large flow of water to produce electricity. This type of hydropower station does not need to build a hydropower station. dam, and is used in areas where the water height is not high but the flow is significant on the large river.
Both power plants usethe flow of water to drive the turbine blades to turn the turbine. The large shaft of the turbine is connected to the generator rotor, so the generator rotor also rotates and DC excitation. the power is injected into the generator rotor. A rotating magnetic field is established when this rotating magnetic field passes through the stator winding of the generator, it induces an electric potential in the stator winding and generates electricity.