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UHVDC | T&D World has extensive experience with HVDC technology, and has developed and built converter transformers for the most demanding projects, including products for ultrahigh-voltage transmissions. 800 kV UHVDC (ultrahigh-voltage direct current) transmission was put into commercial service in 2010; 1,100 kV UHVDC is now being developed.

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HVDC converter - Wikipedia HVDC converter converts electric power from high voltage alternating current (AC) to high-voltage direct current (HVDC), or vice versa. HVDC is used as an alternative to AC for transmitting electrical energy over long distances or between AC power systems of different frequencies. HVDC converters capable of converting up to two gigawatts (GW) and with voltage ratings of up to 900 kilovolts ...

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Engineering News - Changji–Guquan ultrahigh-voltage direct ... has been awarded the contracts, valued at $300-million, to supply breakthrough technologies for the Changji–Guquan UHVDC link. The company will supply the HVDC converter valves, direct ...