wind turbine – converter interaction promotion wp3 · this project has received funding from the...

© PROMOTioN – Progress on Meshed HVDC Offshore Transmission Networks

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 691714.

PROMOTioN WP3- Wind turbines converter interaction

Black start capabilities of HVDC connected offshore wind power plants

Poul Sørensen, DTU Wind Energy

25 September 2018, Global Wind Summit 2018, Hamburg



WP3 – Wind turbines converter interaction

25.09.2018 2



PROMOTioN WP3

Black Start by Offshore Wind Turbines

25.09.2018 3

Step 1

Self-start of

Wind Turbine

Step 2

Self-Energization of

Wind Power Plant

Step 3

Contribution to Grid

Restoration

Objective:

To avoid issues of non-

operating wind turbines;

- Moisture

- Icing

- Vibrations

- Deformation

Objective:

To energize WPP and

substations (AC and

HVDC) auxilary w/o

any external supply

Objective:

To provide black start

for the onshore power

system

- Wind turbines will

start w/o grid voltage

- Wind turbines will

supply themselves

using wind

(houseload operation)

WPP will operate

similar to the

conventional black

start units

WPP will energize up

to the onshore PoC



HVDC offshore terminal

VSC-MMC

HVDC link

VSC-MMConshore

In case of normal conditionsEnergization from onshore

PROMOTioN WP3

Offshore AC Network Start-up Options

25.09.2018 4

Energy Source

In case of offshore grid outageOffshore Energy Source (e.g. diesel generator)

ESES

ES

ES

In case of offshore grid outage or collection system failureBlack-startable wind turbines



PROMOTioN WP3

Generic Self-Energization Sequence

25.09.2018 5

Gearbox

Synchronous

Generator

Filter

Rotor-side

VSC

(RSC)

Grid-side

VSC

(GSC)

WT-DC WT

Transformer

Battery

energy storage system

(BESS)

UPS

Self-start

Sel

f-

sust

ain

Chopper

FilterArray cable

DG

Auxiliaries

+

Controller

Type 4

Variable-speed

Wind Turbine

(WT)



PROMOTioN WP3


25.09.2018 6

Gearbox

Synchronous

Generator

Filter

Rotor-side

VSC

(RSC)

Grid-side

VSC

(GSC)

WT-DC WT

Transformer

Array cables

Battery


(BESS)

UPS

WPP

Transformer

OWPP

substation

Export cable

WT

Strings

Self-start

Sel

f-

sust

ain

Para

llel

op

erati

on

Chopper

FilterArray cable

DG

Auxiliaries

+

Controller

Type 4

Variable-speed

Wind Turbine

(WT)

DG

Offshore Wind

Power Plant

(OWPP)

Diesel generator

backup



PROMOTioN WP3


25.09.2018 7

Gearbox

Synchronous

Generator

Filter

Rotor-side

VSC

(RSC)

Grid-side

VSC

(GSC)

WT-DC WT

Transformer

Array cables

Battery


(BESS)

UPS

WPP

Transformer

OWPP

substation

Export cable

WT

Strings

WPP2

WPP1

ONshore converter

transformer

PCC

Onshore

AC gridONshore-VSC

(Inverter)

OFFshore ONshore

Self-start

Offshore HVDC

substation

OFFshore converter

transformer

HVDC

Cable link

OFFshore-VSC

(Rectifier)

Onshore HVDC

substationBackup

Sel

f-

sust

ain

Para

llel

op

erati

on

Off

shore

Gri

d-f

orm

ing

& C

IO

Chopper

FilterArray cable

DG

Auxiliaries

+

Controller

Type 4

Variable-speed

Wind Turbine

(WT)

DG

DG

Backup

Filter Filter

Offshore Wind

Power Plant

(OWPP)

Diesel generator

backup



PROMOTioN WP3

Supply of Auxiliaries and Step Load ChangesWind turbine rotor side response

25.09.2018 8

WT house-load

(aux) 3-5% 20% step P load

Impact on loads

to be investigated!

Torque



PROMOTioN WP3

Ongoing: Black start simulation test on part of DK2

25.09.2018 9

SK4

[https://ens.dk/sites/ens.dk/files/Statistik/el_produktion_og_transmission_2017_300dpi.pdf]

Energinet plans Black Start Simulation Test with Skagerrak 4 (SK4) HVDC interconnector (Norway-Denmark) outside PROMOTioN project

In PROMOTioN project:

Black Start Simulation Test with offshore WPP

To be energized;

• 3 buses

• Overheadline & undergroundcable

• Shunt reactor, transformer

• Step MW++ load

Load stepwise changes

Frequency & voltage setpointchanges

Load disconnection

COPYRIGHTPROMOTioN – Progress on Meshed HVDC Offshore Transmission

Networks

MAIL [email protected] WEB www.promotion-offshore.net

The opinions in this presentation are those of the author and do not

commit in any way the European Commission

PROJECT COORDINATORDNV GL Netherlands B.V.

Utrechtseweg 310, 6812 AR Arnhem, The Netherlands

Tel +31 26 3 56 9111

Web www.dnvgl.com/energy

CONTACT

PARTNERSDNV GL Netherlands B.V., ABB AB, KU Leuven, KTH Royal

Institute of Technology, EirGrid plc, SuperGrid Institute,

Deutsche WindGuard GmbH, Mitsubishi Electric Europe

B.V., Affärsverket Svenska kraftnät, Alstom Grid UK Ltd

(Trading as GE Grid Solutions), University of Aberdeen,

Réseau de Transport d‘Électricité, Technische Universiteit

Delft, Statoil ASA, TenneT TSO B.V., Stiftung OFFSHORE-

WINDENERGIE, Siemens AG, Danmarks Tekniske

Universitet, Rheinisch-Westfälische Technische Hochschule

Aachen, Universitat Politècnica de València, SCiBreak AB,

Forschungsgemeinschaft für. Elektrische Anlagen und

Stromwirtschaft e.V., Ørsted Wind Power A/S, The Carbon

Trust, Tractebel Engineering S.A., European University

Institute, Iberdrola Renovables Energía, S.A., European

Association of the Electricity Transmission & Distribution

Equipment and Services Industry, University of Strathclyde,

ADWEN Offshore, S.L., Prysmian, Rijksuniversiteit

Groningen, MHI Vestas Offshore Wind AS, Energinet.dk,

Scottish Hydro Electric Transmission plc, SCiBreak AB

APPENDIX



DISCLAIMER & PARTNERS

25.09.2018 10

mailto:[email protected]

http://www.promotion-offshore.net/

http://www.dnvgl.com/energy

wind turbine – converter interaction promotion wp3 · this project has received funding from the...

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