Wood Thilsted Partners Limited - Asia Wind · 2019. 5. 1. · 13. Ex a mp l e S i te - Lay o u t o pt i m i z at i o n an d w i n d t u r bi n e s e l e c t i o n. Co m p a ri so

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© Wood Thilsted Partners Ltd Company Registered in England No 09853253

Wood Thilsted Partners Limited

Luke Fussell, Senior Engineer

Developing the best Offshore Wind Farm

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Introduction: Luke Fussell

A bit about me:• Senior Engineer at Wood Thilsted Partners• MEng, Mechanical Engineering from

University of Bath (2006)Career Highlights:• Just started at WT• Previously Deputy Head of Office at LICenergy

UK (3.5 years)• Prior to that, spent 8+ years at Atkins in

various departments, including Oil & Gas, plus 18 month secondment to Vestas

• Recently Owner’s Engineer for 2 French offshore wind farms currently in development (EPCI Contracts)

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© Wood Thilsted Partners Ltd Company Registered in England No 09853253 3

Wood Thilsted Partners is an engineering company specialised in geotechnical and foundation engineering for offshore wind farms.

Wood Thilsted Partner advises in all phases of wind farm developments; from due diligence of green field developments through to construction and O&M phases.

The company was established November 2015 by former two senior engineers from Ørsted (formerly Dong Energy) and has by today grown to 34 employees. Wood Thilsted is working for a wide range of clients across the offshore wind industry in Europe, North America and South East Asia.

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© Wood Thilsted Partners Ltd Company Registered in England No 09853253 4

Our company

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”First of all, I would like to let you know that I am deeply impressed with the work you have done– I think COWI and Ramboll should be scared to their bones when they get to know about your performance!”

Marc Siedel, Dr. ingSenior Key Expert Support Structures for Offshore Wind TurbinesSiemens Wind Power

5

”Benni and I wish to thank you for the great job you did at He Dreiht. We won the bid and would not have been able to do so without your help and expertise. It was a tough call for EnBW and I hope that this bold move without any subsidiaries (yes it really is 0€ per kWh) pays off. ”

Fawad Mohammadi, Dr.Manager, Foundations offshore windEnBW AG

Our clients

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Developing the best Offshore Wind Farm

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Designing the best Offshore Wind Farm

• Huge number of inter-linked factors that go into designing an offshore wind farm

• Focus of this presentation is on optimisation of the wind-farm LAYOUT(Hint: It doesn’t all need to be in straight lines)

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“Wind farm optimisation is a highly profitable exercise that can make a difference between a project going ahead or not”

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So what is it? What does it mean?

• Site optimisation is effectively a FEED study for the layout

• At the heart is a full-life cycle cost modelwhich can include:• Site bathymetry and geology,• different turbines,• array cable layouts and voltages, • and can be adjusted to minimise ground risks

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Geotechnical Investigations and Foundations

SiteConditions Unknown

Foundation concept selection

Wind Farm Layout fixedWTG already selected

Certified Design Basis detailed design

SITE

INV

ESTI

GA

TIO

N

Geophysical survey 10% Geotechnical

survey

10% Laboratory testing

100% Geotechnical survey


Foundation specific cyclic

testing

Pre-investment

decision

ENG

INEE

RIN

G P

HA

SES Due diligence & Desk

studyGround Modelling

Ground Risk Assessment and Mitigation Strategy

Geotechnical laboratory testing

ENDSufficient

investigation

Consultation:DeveloperFinanciersFabricatorContractor

STARTDesk Study

Update geotechnical

report and risk register

Are residual risks acceptable

to project?

Undertake survey / study

Evaluate survey / study and

update ground model

No

Yes

Design Evaluation

Plan study / investigation to

mitigate risk

Optimisationof layout

Site Assessmentoptimisation

Design optimisation

Construction support

Certification

Effective strategies for site investigations and ground modelling to effectively minimize construction risks and optimize DEVEX and CAPEX for the project

http://www.google.dk/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=ZjvsN4lzH8MdvM&tbnid=fdcQyQCUGoh2AM:&ved=0CAUQjRw&url=http://www.maritimedanmark.dk/?Id=20348&ei=PBNeU8mpN4viywO-xICIBg&bvm=bv.65397613,d.bGE&psig=AFQjCNEutyCkCA0wlERVeuJn_nAOMdvUAw&ust=1398760623480140

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Example Site - Geotechnical Zones for support structure design

Blue area has worst ground conditions. Foundations here are more expensive

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Inter Array Cable (IAC) Architecture selected is “split-string”

Split-string for IAC architecture

IAC routed parallel to sand waves

A detailed study of site bathymetry and sediment transport was undertaken – a Geomorphology study. This informed the likely long-term change in ground levels

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Example Site - Layout optimization and wind turbine selectionComparison of Energy Yield for different turbines and different site constraints. These studies provide input to the economic model.

4 MW turbines

6 MW turbines

sandwaves/sand bank

Protected area for

birds

Project capacity (MW)

Projectrate of

Return(IRR)

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Site Design Example - Seabed contacts from geophysical survey

Contacts recorded from sub-bottom profiling, magnetometer and side-scan sonar

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Geotechnical Investigations and Foundations

SiteConditions Unknown

Foundation concept selection

Wind Farm Layout fixedWTG already selected

Certified Design Basis detailed design

SITE

INV

ESTI

GA

TIO

N

Geophysical survey 10% Geotechnical

survey


100% Geotechnical survey


Foundation specific cyclic

testing

Pre-investment

decision

ENG

INEE

RIN

G P

HA

SES Due diligence & Desk

studyGround Modelling

Ground Risk Assessment and Mitigation Strategy

Geotechnical laboratory testing

ENDSufficient

investigation

Consultation:DeveloperFinanciersFabricatorContractor

STARTDesk Study

Update geotechnical

report and risk register

Are residual risks acceptable

to project?

Undertake survey / study

Evaluate survey / study and

update ground model

No

Yes

Design Evaluation

Plan study / investigation to

mitigate risk

Optimisationof layout

Site Assessmentoptimisation

Design optimisation

Construction support

Certification

Effective strategies for site investigations and ground modelling to effectively minimize construction risks and optimize DEVEX and CAPEX for the project

http://www.google.dk/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&uact=8&docid=ZjvsN4lzH8MdvM&tbnid=fdcQyQCUGoh2AM:&ved=0CAUQjRw&url=http://www.maritimedanmark.dk/?Id=20348&ei=PBNeU8mpN4viywO-xICIBg&bvm=bv.65397613,d.bGE&psig=AFQjCNEutyCkCA0wlERVeuJn_nAOMdvUAw&ust=1398760623480140

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Summary

• Wind farm optimisation can be a highly profitable exercise

• Life Cycle cost modelling is a key part of this work

• Plan ahead for success; start small and work upwards, using results as you go

• Consider as many variables as you can

• Happy optimising! ☺

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‘

Contact details:

Luke Fussell, Senior Engineer

[email protected]

+44 7799 413035

mailto:[email protected]

Wood Thilsted Partners Limited - Asia Wind · 2019. 5. 1. · 13. Ex a mp l e S i te - Lay o u t o pt i m i z at i o n an d w i n d t u r bi n e s e l e c t i o n. Co m p a ri so

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