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This article starts with the principle of electromagnetic induction, analyzes the reasons why power transformers rely on alternating current （AC） to achieve voltage conversion, and explores the risks posed by direct current （DC）. It also delves into technical solutions in special scenarios and future development trends.

This article introduces the box-type substation, also known as the prefabricated substation. It is a distribution device that combines high-voltage switchgear, transformers, and low-voltage distribution devices in a sealed metal box. It has the ability to isolate foreign impurities such as rain and dust. Depending on the usage scenario, the design is different, and you can choose to deal with power supply or lighting power. The various components in the box can also choose the capacity and voltage level

Dry-type power transformers have the advantages of stability and safety, low maintenance cost and wide application range. This is due to the unique structure of dry-type power transformers.

This article introduces the operation mode and types of power transformers. Transformers are key electrical equipment that use the principle of electromagnetic induction to change the AC voltage level. They are mainly composed of iron core and windings, which can be made of copper or aluminum to achieve efficient power transmission. They are very critical equipment in modern power networks.