Hydrogen Technology World Expo
06 Aug 2025
Converter Transformer
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Key Capabilities:
- Voltage Levels: 6.6 kV, 11 kV, 22 kV, 33 kV
- Connection Types: Primary, star, delta, or extended delta
- Output Options: 2–27 secondary windings (up to 64 for exceptional cases)
- Vector Group: -25° to +25° (5° variations); extended delta on LV creates unique angles
- Cooling Options:
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Natural cooling (ONAN) or forced cooling (AF)
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Oil-filled transformers
- Dry type (with directed air flow for up to 10 MVA)
- Pulse Capability: Supports 12–48 pulses depending on design
- Efficiency:
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99% for large transformers
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98% for transformers up to 1 MVA
- Harmonics Control: Copper shielding between HV and LV windings to contain harmonics
- Winding Material: Copper foil or thinner conductor to minimize Eddy current losses
- Tap Changers: Off-circuit tap links available on HV side
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