Wind Transformer also known as a wind turbine generator transformer or WTG transformer is a specialized electrical device used to step up the low-voltage power generated by a wind turbine to a medium or high voltage suitable for grid transmission. These units are categorized as "severe duty" components because they must withstand unique stresses that conventional distribution transformers cannot, including constant thermal cycling from variable wind speeds and high-frequency transients from grid switching.
Technical Specifications
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Feature
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Specification
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|
Type
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Oil Cooled Type
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Rating
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Upto 7.5 MVA
|
|
Voltage Class
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Upto 33kV
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|
Voltage Ratio
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0.975kV/0.950kV/0.690kV
|
|
Frequency
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50 Hz
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|
Phase
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3 Phase
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|
Cooling Type
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ONAN/ONAF
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Vector Group
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As Required
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Winding Material
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Copper/Aluminium
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Insulation Class
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A
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Tap Range
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Off Circuit Or On-Load Tap Changers for HV/LV Variation As Per Customers Specification
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Impedance
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In Line With Applicable Standards/ Customers Specification
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|
Applicable Standard
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IS, IEC, IEEE Etc.
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Standard Tests
- Winding Resistance Measurements
- Ratio and Polarity Measurements
- Exciting Current and No Load Losses
- Impedance and Load Losses Measurements
- AC Dielectric Test
- Induced Voltage Test
- Core Ground Test
- Oil BDV Test
- Magnetic Balance Test
- Insulation Resistance Test
- Vector Group Test
- Capacitance and Tan-Delta Test
Optional Tests
- Temperature Rise
- Sound Level
- Radio Influence Voltage
- Partial Discharges
- Basic Insulation Impulse Level
- SFRA Test
- Short circuit Test
- Knee Point Voltage of bushing CT
- Polarity and ratio test of bushing CT
Brands
§ ABB | RPPL | Synergy | Rishabh | Telwne | T&R | CG Power
Common Applications
§ Cement Indutries | Steel Industries | Chemical Indutries | Renewable Energy | Refineries | Electricity Boards | Infrastructure | Power Plants | Commercial | Utilities