電子部品サプライヤー | トランスフォーマー, インダクタ, インバータ
1.Why oil immersed transformers are still the mainstream of the global power grid
Against the backdrop of rapid development of new energy and continuous expansion of the global power grid, 油浸変圧器 still dominate the medium and high voltage power systems.
Whether on the power generation side, transmission side, or industrial distribution field, oil immersed transformers remain the preferred solution in the global market due to their high reliability, strong overload capacity, and mature technical system.
Especially in regions such as Africa, 中東, 南アメリカ, そして東南アジア, oil immersed transformers have been widely used by power companies and EPC projects for a long time due to their adaptability to harsh environments and low maintenance costs.
2.What is an 油浸変圧器
Oil immersed transformers refers to a transformer in which the winding and iron core are completely immersed in insulating oil during operation.
Insulating oil simultaneously undertakes three core functions:
- insulation
- heat dissipation
- Fault energy buffer
This is also the fundamental difference between it and dry-type transformers.
3.Core structure and technical principles of oil immersed transformers
3.1 Iron Core System
Cold rolled oriented silicon steel sheet
Ladder laminated structure
Reduce no-load losses and noise
👉 High end products have widely adopted low loss silicon steel and laser marking technology.
3.2 Winding System
材料: Copper winding/Aluminum winding
Form: cylindrical, continuous, spiral
Key indicators:
- 機械的強度
- 熱安定性
- Anti short circuit capability
3.3 Insulation oil system
Common oils include:
- mineral oil
- natural ester oil
- Synthetic ester oil
その中で, environmentally friendly ester oils are becoming a new hotspot in the international market, especially in European projects.
4.Cooling method and model classification
| Cooling Type | 説明 | Typical Application |
|---|---|---|
| オナン | オイルナチュラル, エアナチュラル | Distribution transformers |
| オンオフ | オイルナチュラル, Air Forced | Medium & large transformers |
| OFAF | Oil Forced, Air Forced | High-load operation |
| OFWF | Oil Forced, Water Forced | Special industrial use |
5.Key performance advantages of oil immersed transformers
Superior heat dissipation performance
Strong overload capacity
Long operating lifespan (以上 30 年)
Suitable for high voltage and large capacity
Mature maintenance experience and global applicability
6.Oil immersed vs. 乾式変圧器 (comparison from an engineering perspective)
| Item | 油入 | Dry-Type |
|---|---|---|
| Voltage level | Medium & 高い | Low & Medium |
| Capacity range | Large | Relatively limited |
| Cooling efficiency | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ |
| Fire risk | Moderate | Low |
| Initial cost | Lower | Higher |
7.International Market Trends and Export Focus
The current focus of overseas customers’ attention includes:
- Compliance with IEC 60076
- Energy Efficiency Level (Low Loss Design)
- anti-corrosion coating
- Adaptability to high temperature, high humidity, and high altitude
Despite the continuous evolution of new energy technologies, oil immersed transformers remain an irreplaceable basic equipment in the global power system.
Its technological roadmap is mature, with a wide range of application scenarios, and it will continue to maintain stable growth for a considerable period of time in the future.
