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Vattenfall AB

HVDC References

Vattenfall Power Consultant

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Vattenfall AB 2

More than 50 years experience in HVDC

HVDC connections in andbetween the Nordic countries.

Environmentally friendly

power supply to theIsland of Gotland

Submarine cableconnections betweenNorway, Denmark,Netherlands, Sweden,Finland, Estland, Polen

and Germany. Ongoing project:

FennoSkan II.

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Vattenfall AB 3

Gotland HVDC Swedish mainland - Gotland

Main Data

1954: 100 kV 20 MW monopole

1983: 150 kV 130 MW monopole 1987: 150 kV 2x130 MW

Total cable length: 2x97 km

Max. laying depth: 170 m

Services (cables and converter stations)

Feasibility study

Tender documents

Evaluation and negotiations

Design review

Installation

Supervision during construction and commissioning

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Vattenfall AB 4

Konti-Skan HVDC Sweden - Denmark

Main Data

1965 : 250 kV 250 MW monopole

1987: +250, -285 kV 250+300 MW 2006: Pole 1 refurbishment +285 kV 300 MW

Total cable length: 2x67 km

Max. laying depth: 90 m

Services (cables and converter stations)

Feasibility study

Tender documents (ITB)

Tender evaluation and negotiations

Design review

Installation

Supervision during construction and commissioning

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Vattenfall AB 5

Fenno-Skan HVDC Sweden - Finland

Main Data

1989: 400 kV 500 MW monopole

2010: 500 kV 800 MW 2nd pole

Total cable length: 200 km

Max. laying depth: 120 m

Services (cables and converter stations)

Feasibility study

Tender documents (ITB)

Tender evaluation and negotiations

Design review

Installation

Supervision during construction and commissioning

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Vattenfall AB 6

Baltic Cable HVDC Sweden - Germany

Main Data

450 kV 600 MW monopole

Total cable length: 255 km (incl. land cables)

Services (cables and converter stations)

Feasibility study

Tender documents (ITB)

Tender evaluation and negotiations

Design review

Supervision during construction and commissioning

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Vattenfall AB 7

SwePol Link HVDC Sweden - Poland

Main Data

2000: 450 kV 600 MW monopole

Total cable length:250 km

Max. laying depth: 90 m

Services (cables and converter stations)

Owners engineer

Feasibility study

Tender documents (ITB)

Tender evaluation and negotiations

Design review

Supervision during construction and commissioning

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Vattenfall AB 8

Other European HVDC Projects

Sweden: Gotland HVDC Light connection of wind farms

Design review

Supervision of construction, installation and commissioning

Azores: Island interconnection

Feasibility study

Nederland England: Brit Ned HVDC Interconnection Technical issues in the environmental permit process

Estonia - Finland: Est-Link HVDC Light interconnection

Review of cable route survey

Supervision of cable installation

Denmark: Store Baelt 400kV 500 MW island interconnection

Evaluation of tenders and negotiations

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Vattenfall AB 9

Leyte - Luzon HVDC Interconnection

Main Data

350 kV 440 MW monopole

Total cable length: 2x19 km

Max. laying depth: 170 m

Services

Feasibility study

Tender documents (ITB)

Tender evaluation and negotiations

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Vattenfall AB 10

Cook Strait New Zealand

Main Data

350 kV 2x500 MW

Total cable length: 3x40 km

Max. laying depth: 260 m

Services (cable part only)

Review of route survey

Design quality surveillance (ITB)

Supervision:

Review of inspection and test plans

Witnessing of testing

Loading and laying surveillance

Review of final documentation

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Vattenfall AB 11

Haenam Cheju South Korea

Main Data

180 kV 2x150 MW

Total cable length: 2x102 km

Max. laying depth: 135 m

Services (repair of cables)

Investigation of the responsibility for the damage

Review of costs

Tender evaluation

Design review of physical protection

Supervision of cable handling

Supervision of laying

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Vattenfall AB 12

Other Asian HVDC Projects

Malaysia: Bakun 500 kV 2x800 MW

Feasibility study

Thailand-Malaysia: Back-to back HVDC Interconnection

Feasibility study

India: Rihand HVDC SSO study

Operation and maintenance study

Project appraisal on behalf of the Financier

Australia: Bass Link

Brief design quality surveillance (ITB)

Technical issues in the environmental permit process

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Vattenfall AB 13

African HVDC Projects

South Africa: Apollo 533 kV 2x900 MW

Review of tender documents (ITB)

Tender evaluation

Review of design

RD Congo: Inga Kolwezi 500 kV

2x260 MW refurbishment and upgrade to 2x500 MW Inspection of the status of the existing HVDC

Tender documents, technical part (ITB)

Tender evaluation and negotiation (not yet performed)

Supervision (optional)

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Vattenfall AB 14

American HVDC Projects

Brazil: Itapu

Reliability study

Canada USA: HVDC interconnection (cable part only)

Cable design quality surveillance (ITB)

Supervision of cable installation

World Bank

Multi-terminal study