Power Transformer for Step-up Substation-500kV

1200MVA single-phase oil-immersed autotransformer is engineered for 500kV class power transmission, stepping voltage between 500kV, 220kV, and 110kV levels for large-scale GSU and grid interconnection. Featuring amorphous alloy cores and low-resistance copper windings, it achieves IE3-class efficiency with reduced losses.

Equipped with OLTC, overcurrent relays, and temperature sensors, it ensures fault-safe operation under continuous full-load conditions. Fully compliant with IEC 60076-1, IEEE C57.12.00, ANSI C57.12.90 and AS/NZS 60076.5.

Product Advantages

• Ultra-high capacity — 1200 MVA single-unit rating for bulk power transfer in generator step-up and back-bone transmission applications
• Multi-voltage autotransformer design — Three-winding configuration (500kV/220kV/110kV) for flexible grid interconnection at EHV levels
• High efficiency & low loss — Amorphous alloy cores and low-resistance copper windings meeting IE3 efficiency class
• Forced oil & air cooling (OFAF) — Maintains stable thermal performance under continuous full-load operation
• On-load tap changing (OLTC) — Enables voltage regulation under load without service interruption
• Smart grid integration — IoT sensors for real-time monitoring of temperature, oil quality, and partial discharges with predictive maintenance

Parameters

Environmental Conditions

• Ambient temperature: −25 °C to +40 °C (24h average ≤ +35 °C)
• Altitude: ≤ 1000 m
• Relative humidity: ≤ 90% (at +25 °C)
• Solar radiation: ≤ 1000 W/m²
• Pollution level: Light to heavy

Application Field

• Power Plant Step-up Substation
• Industrial Power System
• Hub Substation