The main transformer (also called main transformer or main substation transformer) is a key device in the power system. It is mainly used to connect the generator to the power grid to increase or decrease the voltage so as to effectively transmit electric energy. The following is a detailed introduction to the main transformer:
1. Basic concept
The main transformer refers to the transformer in the power system that is responsible for converting the electric energy output by the generator into a voltage level suitable for transmission or distribution in the power grid. It is usually located in power plants, substations or large industrial facilities.
2. Working Principle
The working principle of the main transformer is based on electromagnetic induction. When the current passes through the primary winding, an alternating magnetic field is generated in the iron core of the transformer. This magnetic field affects the secondary winding, inducing a voltage. The main transformer can be designed to step up or step down the voltage according to the turns ratio of the winding.
3. Types
Step-up transformer: Steps up the low voltage current of the generator so that it can be transmitted over long distances through high-voltage transmission lines.
Step-down transformer: Steps down the high voltage in the transmission line for use in the distribution network. Phase-modulating transformer: Used to adjust the power factor and maintain the stability of the power grid.
