چكيده به لاتين
Today, in addition to economic problems, the limitations of energy resources and environmental requirements have inclined human societies towards renewable energy systems. On the one hand, the limitation of energy resources requires the correct management of existing resources and the use of new resources; And on the other hand, environmental requirements have required most countries, including our country, to reduce greenhouse gases.
According to the geographical area, there are areas with continuous wind in the north, south, east and west of our country. The use of modern renewable energy systems can be a good option to estimate part of the environmental requirements. Today, one of the important and economic sources of renewable energy is wind energy. In this type of energy conversion systems, wind turbines and various electric generators are used to convert wind energy into electrical energy. One of the most economical and conventional generators used in wind power plants is the doubly fed induction generator. To transfer power to the rotor of this type of induction generator, usually sliding rings and brushes are used. In this structure, due to the mechanical contact of the broom with the sliding rings and the presence of wear, the brooms gradually disappear. Therefore, this structure needs maintenance. To remove the brushes in modern generators, rotating transformers are used. The important advantage of rotating transformers is that instead of mechanical contact, electric power is applied to the rotor winding through magnetic coupling, and as a result, the disadvantages of the presence of brushes are eliminated. Naturally, in this case, mechanical losses are reduced and the life of the excitation system is increased.
In this project, different structures of rotating transformers are investigated and according to their performance in wind energy systems, a sample rotating transformer is designed and built.
