Power generation：The voltage of electric energy generated by power plants is generally low. For example, in common thermal power plants, the generator outlet voltages are mostly 6.3kV, 10.5kV, etc. The voltage needs to be increased to 110kV, 220kV or even higher through a step-up transformer. , so that it can be transmitted to distant substations or users economically and efficiently.
Transmission link：In the process of high-voltage power transmission, transmission lines of different voltage levels require voltage conversion and matching through transformers in substations to achieve long-distance, large-capacity transmission of electric energy and reduce electric energy loss during the transmission process.
Power distribution link：In the process of distributing electric energy to various users, a step-down transformer is needed to reduce the high voltage on the high-voltage transmission line to a voltage level suitable for users, such as 35kV, 10kV, 0.4kV, etc., to meet different types of needs. Users’ electricity needs.
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