As the core equipment of the power system, transformers have applications in various fields such as power transmission and distribution, industrial manufacturing, transportation, building power supply, communication networks, and new energy. Through functions such as voltage conversion, current regulation, and impedance matching, the stable operation of the entire process from power generation to consumption is ensured. ‌‌

1. Power system
   Power generation process: The step-up transformer increases the voltage generated by the power plant to high voltage (such as 1100kV or above), reducing long-distance transmission losses. ‌‌
   Transmission and distribution: Conversion between different voltage levels (such as using ± 500kV DC converter transformers for high-voltage transmission lines), voltage reduction to 380V/220V for residential electricity in urban distribution networks. ‌‌
   

2. Industrial sector
   Heavy equipment adaptation: Steel plants, chemical plants, etc. require customized voltage (such as electric furnaces using high current and low voltage), and equipment requirements are accurately matched through transformers. ‌‌
   Safety isolation: Explosion proof or isolation transformers are used in hazardous environments such as mines and petrochemicals to ensure electrical safety. ‌‌

3. Transportation and Communications
   Rail transit: The high-speed rail traction power supply system requires a dedicated transformer (such as 27.5kV single-phase AC), while the subway uses low-voltage DC power supply (750V/1500V). ‌‌
   Airports and ports: Ground power supply equipment and ship shore power systems rely on transformers to achieve voltage adaptation. ‌‌

4. New energy and emerging fields
   Photovoltaic/Energy Storage: Photovoltaic inverters are matched with transformers to achieve grid voltage matching, and the energy storage system requires bidirectional transformers to support charging and discharging. ‌‌
   Data center: High voltage DC power supply (such as 240V) optimizes energy efficiency through transformers and reduces heat dissipation costs. ‌‌