The Electrical Substation Transformer
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Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of the electrical substation transformer in China. If you're going to buy customized the electrical substation transformer made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.
Electrical substation transformers are core equipment in power systems, utilizing the principle of electromagnetic induction to achieve voltage conversion and efficient power transmission.
They primarily perform three functions: voltage step-up and step-down, power distribution, and electrical isolation, directly impacting the stability and economic efficiency of power transmission.
Typical structure and components
Core and Windings
The core is composed of laminated silicon steel sheets forming the magnetic circuit. The high-voltage winding uses thin wire to reduce current loss, while the low-voltage winding uses thick copper busbars to carry the high current.
The windings are insulated in layers, with the high-voltage winding located on the outside for improved heat dissipation.
Auxiliary Systems
Oil-Immersed Cooling: Insulating oil serves as both a cooling medium and an insulating layer. An oil conservator on top of the tank regulates thermal expansion and contraction of the oil volume.
Safety Protection: A gas relay monitors internal faults, and a lightning arrester protects against lightning overvoltage.
Bushing Insulation: Ceramic bushings isolate high and low voltage terminals to prevent electrical creepage.
| Function | Implementation principle |
|---|---|
| Voltage conversion | Adjust input and output voltage levels by turns ratio |
| Current conversion | Follow the law of conservation of energy and automatically match the current intensity |
| Electrical isolation | There is no direct circuit connection between the primary and secondary sides to ensure safe operation |
| Impedance matching | Optimizing magnetic circuit design to improve power transmission efficiency |
Main categories and applications
Step-Up Transformer:
Step-Up Transformer: Boosts voltage at power plant outlets to 110kV-500kV, reducing losses in long-distance transmission.
Step-Down Transformer:
Steps down voltage at substations to 10kV/400V for industrial, commercial, and residential use.
By Installation Type：
Pole-mounted transformers: Mounted overhead on utility poles, suitable for rural and suburban power distribution
Box-type substations：
Integrated design allows for direct ground placement, saving space in urban areas
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