HVDC Converter Transformer for Long-Distance DC Transmission

This converter transformer is designed for HVDC transmission systems, enabling reliable AC-DC power conversion and grid interconnection. It connects the AC grid with converter valves, handling combined AC and DC voltage stresses while providing electrical isolation between systems.

The winding configuration and insulation system are engineered to withstand operating overvoltage, lightning impulse, and DC bias magnetization. With forced oil circulation cooling and reinforced short-circuit withstand capability, it supports bulk power transfer across long distances, asynchronous grid interconnection, and renewable energy integration worldwide.

Features of Converter Transformer

• Combined AC-DC Insulation — Oil-paper insulation system engineered for simultaneous AC voltage, DC voltage, and polarity reversal stresses inherent in HVDC converter operation.
• Harmonic-Robust Split Windings — Multi-bridge arm topology configuration reduces harmonic impact on the AC grid and maintains power quality under converter switching.
• Forced Oil Circulation Cooling — ODAF/OFWF systems manage high heat generation of large-capacity conversion, ensuring stable temperature rise under continuous rated load.
• On-Load Tap-Changer Regulation — Wide-range voltage regulation coordinated with converter valve trigger control enables precise DC voltage adjustment without dead zones.

Parameters

Environmental Conditions