In solar farms, diesel genset stations, and industrial facilities, the step-up transformer (GSU) connects low-voltage generation to medium-voltage utility grids. Proper engineering ensures grid compliance, harmonic resilience, and long-term reliability.
1. Application-Specific Design: Solar PV vs. Genset
- Solar PV Inverters: High-frequency harmonics and voltage fluctuations demand electrostatic shielding and low-loss silicon steel cores. Multi-split LV windings allow direct paralleling of multiple inverters.
- Diesel/Gas Gensets: Sudden load acceptance requires 100% pure copper windings with high mechanical clamping to withstand short-circuit stresses.
2. Harmonic Mitigation & Thermal Overload
Non-sinusoidal currents from inverters cause stray losses and localized hot spots. Specify optimized ONAN oil cooling ducts and suitable thermal margins to handle continuous peak loads in ambient temperatures up to 50°C.
3. Tank Construction: Hermetically Sealed Reliability
Corrugated hermetically sealed tanks eliminate oil conservators and breathers. By preventing moisture and oxygen ingress, insulating oil degradation is stopped—enabling 20+ years of maintenance-free outdoor operation.
4. Standards: IEC 60076 vs. IEEE C57
- IEC 60076 (50Hz/60Hz): Standard across Europe, Middle East, Asia, and Africa.
- IEEE C57 (60Hz): Required for North and Latin America, often specifying outdoor tamper-proof pad-mounted designs with dead-front terminations.
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To receive an accurate engineering proposal, prepare:
- Rated Capacity (kVA/MVA) & Primary/Secondary Voltages
- Frequency (50Hz/60Hz) & Vector Group (e.g., Dyn11)
- Application (Solar / Genset / Industrial) & Standard (IEC / IEEE)
Custom Step-Up Solutions by Henan New Electric Power
We manufacture custom oil-immersed step-up transformers from 50kVA to 10MVA (up to 35kV / 34.5kV), 100% routine- and type-tested to IEC & IEEE standards.
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