The main types and characteristics of power transformers

Power transformer is a type of transformer mainly used in the transmission, distribution, and consumption sectors, accounting for the majority of transformer products. The main types and characteristics of power transformers can be summarized as follows:

1、 Classified by phase number

1. Single phase transformer: used for single-phase loads and three-phase transformer groups. A single-phase transformer can convert high voltage power supply into single-phase low voltage for various equipment use. It has the advantages of simple structure, small size, and low loss, and is suitable for use in low voltage distribution lines with small loads.

2. Three phase transformer: used for raising and lowering voltage in three-phase systems. A three-phase transformer is actually composed of three single-phase transformers of the same capacity, mainly used for boosting or reducing voltage in three-phase power supply systems. Its application range is relatively wide, such as substations, industrial and mining enterprises, etc.

2、 Classified by cooling method

Power transformers can be divided into dry-type transformers and oil immersed transformers according to their cooling methods. Among them, oil immersed transformers can be divided into types such as oil immersed self cooling, oil immersed air-cooled, oil immersed water-cooled, and forced oil circulation. This classification method mainly reflects how transformers dissipate heat during operation.

3、 Classified by purpose

Power transformers are mainly used for voltage rise and fall in power transmission and distribution systems, and are essential equipment in the power system. In addition, there are some special-purpose transformers, such as rectifier transformers, electric furnace transformers, welding transformers, etc., all of which belong to the category of special transformers.

4、 Classified by winding form

Power transformers can be divided into double winding transformers, three winding transformers, and autotransformers according to their winding forms. This classification method mainly reflects the circuit structure of transformers.

5、 Technical features

Power transformers adopt advanced design concepts and manufacturing processes, with low no-load and load losses, which can effectively improve energy utilization efficiency. At the same time, it has good mechanical strength and electrical performance, can operate stably in various harsh environments, and has high reliability and durability.

Overall, power transformers are indispensable and important equipment in the power system, with diverse types and distinct characteristics. When selecting and using, it is necessary to consider comprehensively based on actual needs and conditions.