Читать книгу Integration of Renewable Energy Sources with Smart Grid - Группа авторов - Страница 25

As water is a never depleted source and the pressure of water is used to generate energy, hydro-electric power plants gained its significance in renewable energy industry. The energy of flowing water is converted into mechanical energy using a turbine and the coupled generator produced electricity from the mechanical energy.

Figure 1.11 shows hydro-electric power plant. The generator generates electricity by converting the input mechanical energy produced from the energy of water flow. Whenever a magnet moves past a conductor, it causes electricity and the flow of current exists. In a large generator, the electromagnets are made by circulating direct current through wire loops which is wound on steel laminations. These are called as poles, which are held on the outer surface of the rotor. The rotor rotates at a fixed speed as it is connected to the turbine shaft. As the rotor rotates, it cuts the flux produced and induces an emf, and thus, a potential is developed across the generator output.

Figure 1.11 Typical hydro-electric power plant.

The reservoir system acts as a storage pump and can be used whenever required to generate electricity based on the demand. The construction of it is also very simple and this is one of the advantageous features of hydro-electric power generation [11].