Transformers for Wind and Hydropower Industry

GNEE Electric's advanced transformer hydroelectric power plant delivers reliable, high-capacity, and efficient power transmission tailored for large-scale and small hydro installations. In hydroelectric facilities, generators typically produce electricity at lower voltages to optimize turbine and generator design. GNEE Electric transformer in hydro power plant play a pivotal role by stepping up this output to medium or high transmission voltages-commonly 35 kV, 110 kV, 132 kV, 220 kV, 400 kV, or even higher-for efficient, low-loss integration into the national or regional grid.

 

Our products have been exported to over 150 countries across Asia, Europe, Africa, the Middle East, and the Americas, successfully powering wind farms, hydropower plants, and hybrid renewable energy systems worldwide.

 

Whether you need a single unit or a bulk procurement order, GNEE provides factory-direct pricing, rapid delivery, and comprehensive after-sales support to help you maximize project efficiency and minimize lifecycle costs.

 

Learn more about GNEE transformers

 

Wind Power Transformers - Engineered for Onshore and Offshore Applications

Wind power transformers are critical components that step up the low voltage generated by wind turbines (typically 0.69 kV or 35 kV) to higher grid transmission voltages (such as 35 kV or 110 kV), minimizing energy loss during long-distance power delivery. GNEE manufactures a comprehensive range of wind power transformers designed for installation inside wind turbine towers, on base platforms, or directly in the nacelle

 

Hydropower Transformers - High-Efficiency Solutions for Hydroelectric Plants

Hydropower transformers play a fundamental role in stepping up generator output voltage to transmission-level voltage, enabling efficient power delivery from hydroelectric stations to the grid. GNEE provides a wide selection of hydropower transformers, including oil-immersed power transformers and dry-type distribution transformers, customized for small-scale run-of-river projects, large reservoir-based hydropower stations, and pumped-storage facilities.

 

Cases Study of Transformer in Hydro Power Plant

 

 

Wind Farm

GNEE Electric supplies 6300 kVA 35/0.4 kV oil-immersed box transformers for the Anhui Mingguang wind farm. This oil immersed distribution transformer steps up the voltage of electricity generated by 4.5MW wind turbines to 35 kV, and features a sealed oil tank, low no-load loss

design, and FR3 environmentally friendly oil, making it an ideal for compact wind tower bases.

 

 

 

Mountain wind power project - 1250 kVA dry-type transformer

GNEE Electric Company supplied 1250 kVA SCB14 series dry type pad mounted transformer for a mountain wind farm, which have high insulation and heat resistance. These transformers are installed in the turbine nacelle platform to ensure safe and fire-resistant voltage conversion between the turbine and the 35 kV collector grid.

 

 

 

Wind Farm Substation – 110 kV Main Transformer

In a medium-scale wind project, GNEE Electric supplied a 110/35 kV 25 MVA on-load tap-changing transformer as the main substation unit. Designed to IEEE/IEC standards, it ensures efficient power step-up to the high-voltage grid with low partial discharge, high thermal stability.

 

As the global energy transition reshapes power infrastructure, transformers for wind and hydropower industry remain the backbone of renewable energy integration. Whether you are developing an onshore wind farm, an offshore wind project, a hydroelectric power station, or a hybrid renewable energy system, GNEE delivers customized, factory-direct transformer solutions built to international standards and designed for long-term reliability.

 

Ready to discuss your project requirements? Contact our engineering team today for a free technical consultation and competitive quotation. Simply send us your specifications - including required capacity (kVA), voltage ratings (HV/LV), installation environment, and target standards - and we will respond within 24 hours with a tailored solution and pricing.

 

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Rated Capacity(kVA)	Voltage Combination			Vector group	No-load Loss(kW)	Load Loss(kW)	No-load Current(%)	Short-Circuit Impedance(%)
	High Voltage(kV)	High Voltage Tapping Range(%)	Low Voltage(LV)
30	20	±2×2.5 or ±5	0.4	Dyn11 or Yan11 or Yyn0	0.08	0.66/0.63	1.7	5.5
50					0.1	0.96/0.91	1.6
63					0.12	1.14/1.09	1.5
80					0.14	1.37/1.30	1.4
100					0.16	1.64/1.57	1.2
125					0.19	1.98/1.88	1.2
160					0.23	2.41/2.30	1.1
200					0.27	2.85/2.72	1
250					0.32	3.34/3.18	0.96
315					0.38	4.00/3.81	0.88
400					0.46	4.72/4.39	0.8
500					0.54	5.64/5.48	0.8
630					0.65	6.48	0.72
800					0.78	7.84	0.64
1000					0.92	10.7	0.56	6
1250					1.1	12.5	0.56
1600					1.33	15.1	0.48
2000					1.56	19.1	0.48
2500					1.87	22.2	0.4

 

Which transformer is used in hydro power plant?

Classification of Transformers in Hydroelectric Power Plants
High-Voltage Transformers: 132 kV, 220 kV, 400 kV+ Used in large hydro stations connected to national grids.

 

What are some transformers in a wind turbine?

Types of Wind Power Transformers:

Transformer Type	Application Scope
Pad-Mounted Wind Transformer	Small-to-medium onshore wind turbines
Tower-Base Transformer	Integrated into the turbine tower
Step-Up Substation Transformer	Medium-to-high voltage transmission
Three-Winding Power Transformer	Combining multiple turbines or systems

 

What is the 80% rule for transformers?

The 80% rule is a guideline that recommends operating a transformer at no more than 80% of its rated capacity under normal conditions. For example, if a power pole transformer is rated for 50 kVA, it should ideally carry no more than 40 kVA during continuous operation.

 

Which type of transformer is used in a power plant?

Step up transformer is the opposite. They transfer the lower voltage to higher voltage, usually used in power plants, and renewable energy projects such as solar farms.