HVDC Development

Inauguration of the world's first test plant for UHVDC equipment (800 kV DC) at STRI, Ludvika, Sweden.

Commissioning of the world's largest Voltage Source Converter HVDC transmision, Estlink, 350 MW.

Commissioning of the world's first offshore platform HVDC transmission:Troll HVDC Light (2 x 42 MW), Norway

The worlds largest converter transformers (1-phase 3-winding, 621 MVA, 554 metric tons) put in service in the Sylmar Replacement Project, USA

The world's largest HVDC converter, 1,500 MW, 500 kV, commissioned in pole 1 of the Three Gorges - Changzhou transmission, China.

The world's longest land cable, the Murraylink HVDC Light transmission ( 220 MW, 180 km) commissioned in Australia.

The world's largest Voltage Source Converter HVDC transmision (CrossSound, 330 MW) commissioned between Long Island and Connecticut, USA

The world's first project HVDC with CCC (Capacitor Commutated Converter) commissioned at Garabi, Brazil, 2x550 MW back-to-back

The world's first commercial HVDC Light (50 MW) commissioned in Gotland, Sweden

HVDC Light: The world's first voltage source converter (VSC) HVDC transmission based on IGBTs was commissioned in Sweden.

The CCC (Capacitor Commutated Converter) development was announced.

New world record for HVDC submarine cables: 450 kV, 600 MW, 250 km for Baltic Cable, Sweden - Germany.

The world's first electronically controlled AC filter (ConTune) (image) commissioned in Konti-Skan 2.

The world's first air insulated outdoor thyristor valve, 135 kV, 1,050 A, commissioned in Konti-Skan 1.

The first multi-terminal HVDC transmission, Quebec- New England (2,000 MW, ± 500 kV) commissioned.

The world's first active DC filter(image) commissioned in Konti-Skan 2.

New world record for HVDC submarine cables: 400 kV, 500 MW, 200 km for Fenno-Skan.

World's first HVDC transformers with extended delta (image) commissioned in Vindhyachal, 2x250 MW back-to-back station in India

Commissioning of a light triggered thyristor (LTT) test valve (image), 135 kV, 1050 A in Konti-Skan 1.

Itaipu bipole 2 (3,150 MW, ±600 kV) commissioned.

The contract for the multi-terminal Quebec- New England transmission (2,000 MW, ± 500 kV) signed.

Intermountain transmission with the world's most stringent reliability and availability requirements (1,920 MW) commissioned.

Itaipu bipole 1 (3,150 MW, ±600 kV) commissioned.

The 200 MW Highgate back-to-back station commissioned after a record short delivery time of 17 months.

Dynamically suspended thyristor valves (image) were used for the first time in a seismically active area in the Pacific HVDC Intertie Upgrading Project.

Gotland 2 (130 MW) commissioned with the world's first suspended thyristor valves (image), redundant digital control and protection and GIS for HVDC (image).

The world's first project with 500 kV thyristor valves: Inga-Shaba, Congo, transmission (560 MW) commissioned. (Also the world's longest line - 1,700 km.)

Contract signed for the world's largest HVDC transmission: Itaipu, Brazil, 6,300 MW, ± 600 kV.

Third generation thyristor test valve (image), 133 kV, 2,000 A (water cooled) in Pacific Intertie commissioned.

First HVDC transformer for 600 kV DC (image) tested.

The world's first HVDC transmission project with 12-pulse converters: pole 1 of the Skagerrak link, 500 MW, Norway - Denmark, commissioned.

Second generation thyristor test valve, 135 kV, 1,050 A (air cooled) (image) in Konti-Skan, Sweden - Denmark, commissioned.

ABB's last mercury-arc valve project commissioned: Pacific Intertie (1,440 MW, ±400 kV), USA.

Gotland link extended with 10 MW, 50 kV HVDC thyristor valve bridge (image).

First generation HVDC thyristor test valve, 50 kV, 200 A (air cooled) in Gotland link commissioned.

Mercury-arc valve project commissioned: Konti-Skan (250 MW), Sakuma (300 MW) (image) and New Zealand (600 MW).

Start develop HVDC valve based on thyristors

Read:The early HVDC development (pdf, 0,2 MB)