The transformation of the 0.4kV low-voltage distribution network with the purpose of reducing losses can achieve the purpose of reducing electricity costs and reducing the burden on farmers through the reasonable layout of power sources, reasonable distribution of loads and reasonable selection of transformers. The rural power grid has the characteristics of large load dispersion and long power supply radius. Single-phase pole-mounted distribution transformer. In view of the scattered users and small power consumption, the power supply station area adopts a new model of single-phase two-wire or three-wire power supply by single-phase pole-mounted distribution transformers based on the principles of small capacity, dense distribution points, and short radius. It opens up a new idea for power supply in areas with low load density and wide distribution, especially in mountainous areas.

It is suitable for Western countries, Southeast Asia, North and South America, and a large number of single-phase transformers are used as distribution transformers. It can reduce the length of low-voltage distribution lines, reduce line losses, and improve the quality of power supply. The product is suitable for rural power grids, remote mountainous areas, scattered villages, agricultural production, lighting and power consumption. It can also be used on railways and urban power grids for energy-saving transformation columns. type power distribution line, which can be operated as a single phase or as a group of three single-phase units as a three-phase operation.

The single-phase distribution transformer has a simple structure, small size and low loss. It can be mounted on a pole and installed directly closest to the electrical load to shorten the power supply radius of the low-voltage network, reduce losses, and supply power to users with small power loads and urban street lights. Brings great convenience. Combined with the power distribution characteristics of my country’s 10kV system, a new distributed load power supply method is provided for small power load users and 10/0.4kV distribution network. A single-phase distribution transformer only supplies power to 10-20 households. When a single-phase distribution transformer fails, the number of affected households is greatly reduced, and the power supply reliability of distribution lines is greatly improved.