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2004ABBGroup

Power

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HVDC Light to SupportIntegration ofOffshore Wind Power

Peter Sandeberg

ABB GridSystems

Trondheim 2008.01.25

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HVDC Technologies

HVDC Classic 300 3000 MW

Thyristor controlled

Switched Reactive Power Control Typical design valve building plus switchyard Mass impregnated cables

HVDC Light 50 1100 MW

Transistor (IGBT) controlled Continuous Voltage and Reactive Power

Control Typical design with all equipment (including

transformers) in compact building Extruded cables

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Grid Connection for wind

10 50 100 km

MW

600

300

100HVAC

HVAC+

FACTS

HVDCLight

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HVDC Light for Grid Connection of Wind Farms

Wind Farms50 - 1500 MW

OnshoreOffshore

HVDC Lightrectifier

Cable transmission

HVDC Light inverter

AC Grid

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HVDC Light , 150 kV, 175- 555 MW

Phase reactors

Coolers

Cooling system

DC Filter

AC filter

Control and auxiliary

Valves

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1100 MW offshore module

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Connecting wind farms by HVDC Light - Customer Values

Grid management

Full grid code compliance

Superior controllability Voltage and reactive power control

Loss reduction in connected AC network

Support connections at weak network points

Passive Load Operation ( Black Start )

Environmentally adapted

Underground /Submarine transmission

Small footprint and low profile of converters

Oil free cable

Low emissions of electrical and audible noise

Proven offshore concept

Flexible modular design

Short implementation time

Wide range of power

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HVDC Light Simplified Single Line Diagram

AC Harmonic Filters

DC Capacitors(Voltage Sources)

Converter Valves

Phase Reactors

Cables

AC Transformers, breakers/disconnectors

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HVDC Light

-Ud

+Ud

Phasereactor

Harmonic filter

ValveIGBT & diode

Transformer

DC cable

DC cable

P =U1 U2 sin()

X

Q =U1 (U1 - U2 cos())

X

U1 U2

X

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HVDC Light projects

Cross Sound2002, 330 MW

Murraylink2002, 220 MW

Directlink2000,3X60 MW

Gotland

1999, 50 MW

Tjreborg2000,7 MW

Eagle Pass2000, 36MW

Hllsjn1997, 3 MW

Estlink2006, 350 MW

Troll2004,2X40 MW

Valhall2007, 78 MW

Borkum 22009, 400 MW

Caprivi Link2009, 300 MW

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EON Netz, Borkum 2, 400 MW HVDC Light

75 km land cable

128 km sea cable

400 MW off shoreconvertor

400 MW convertor

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ConclusionsConclusions

Suitable technologies for grid connection can offerSuitable technologies for grid connection can offer

wind power:wind power:

Location on best wind sitesLocation on best wind sites

Access to the marketAccess to the market

Simplified grid code compliance and support bySimplified grid code compliance and support by

Reactive power controlReactive power control

Ability to assist network with voltage controlAbility to assist network with voltage control

Frequency toleranceFrequency tolerance

Capability to ride through faultsCapability to ride through faults

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