35kV Oil Immersed Transformers Applications for New Energy

Dec 16, 2025

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Background

 

The renewable energy sector needs better transformers. Traditional power transformers face multiple challenges, including issues related to weight, heat dissipation efficiency, and cost control. This has driven the exploration of new transformer solutions.

 

35kV Oil Immersed Transformer

To address these challenges, 35kV aluminum oil immersed transformers - with advantages such as light weight, excellent thermal performance, and moderate cost - are becoming the preferred solution for wind and solar projects.

 

35kV in New Energy Applications

 

The 35kV voltage class helps effectively reduce transmission losses while enhancing the stability and efficiency of the power system. For new energy power stations, 35kV transformers are critical equipment that transfers electrical energy from the generator set to the grid.
 

Transformer in the Energy Sector

 

 

Material Advantages

Aluminum material is less expensive and more abundant than copper - significantly reduces the manufacturing cost of transformers.
 

Lower Cost

 

Aluminum has a density of about one-third that of copper, which makes aluminum transformers lighter than copper-core transformers. This facilitates installation and transportation - particular advantages in large-scale new energy projects requiring extensive equipment.
 

Lightweight

 

Due to aluminum's excellent thermal conductivity, aluminum-core transformers can dissipate heat effectively, reduce temperature rise, and improve operational efficiency.
 

Excellent Thermal Stability

 

 

Environmental & Renewable Energy Integration

 

The use of aluminum is more environmentally friendly compared to copper. Aluminum resources are abundant, and the environmental burden during mining and production is relatively low. Besides, aluminum can be recycled at a high rate after the transformer is decommissioned - further reduces environmental impact. The oil-immersed design enhances transformer efficiency and longevity, thereby minimize resource consumption caused by frequent equipment replacement.

 

Application Scenarios
 

 

 

In wind farms

35kV aluminum oil-immersed transformers are commonly used to connect wind turbines to the grid. As wind power stations are often located in remote areas, with high installation and maintenance costs, lightweight and highly reliable aluminum transformers become an ideal choice. Their excellent heat dissipation performance and long service life ensure stable operation under high-load conditions.

VKE Oil Immersed Transformer Workshop

 

 

In solar photovoltaic power plants

Transformers need to cope with wide temperature fluctuations and intense sunlight conditions. Because of their good thermal stability, aluminum-core transformers can operate stably over the long term, which guarantees efficient power conversion and transmission. Their economic benefits also make them widely applicable in the construction of large-scale solar PV power stations.

35kV Oil Immersed Transformer Shipment

Supporting the Global Energy Transition

 

As the new energy sector grows, aluminum oil‑immersed transformers will be used more widely. VKE Transformer will play a key role in this trend by helping to spread these transformers, supporting the global shift to clean energy and sustainable power.