This document provides an overview and summary of a study on operations and maintenance (O&M) of offshore wind farms in Europe. The study aims to benchmark O&M costs, practices, and performance across existing wind farms. It also examines trends in technology and the O&M market that may impact future O&M requirements and costs. Key topics covered include O&M strategies, reliability benchmarks, cost elements, technical developments to improve reliability, and challenges for the evolving O&M industry. The customized report is intended to benefit various offshore wind stakeholders by providing insights on optimizing O&M performance and costs over the lifetime of current and future wind farms.

1. EURoPEan stUDy
oFFshoRE WinD FaRM oPERations & MaintEnanCE
BEnChMaRks, Costs anD BEst PRaCtiCEs FoR CURREnt anD FUtURE WinD FaRMs
» How well does the industry manage O&M today and at what cost?
» What changes in strategy, techniques and control will provide quick gains in O&M performance?
» What effects will changes in the industry, technology and service provision have upon O&M
requirements and costs?
Gain UniQUE insiGhts into:
» OPEX and life cycle costs for o≠shore wind farms
» Benchmarks for reliability, availability
» The best strategies and systems for cost effective operations
» Wind farm accessibility and transfer methods
» Technical and business impacts on future wind farm O&M performance
DVV MEDia GRoUP

2. stUDy oBjECtiVEs anD BEnEFits
the offshore wind industry has seen a dramatic increase in concern over the this international study brings together critical information and analysis in one
costs and practicalities of operations and maintenance (o&M). there are strategic clear and digestible report; providing much-needed information on o&M costs,
and operational concerns in the market: strategically, projects will find finance practices, cost drivers and the future evolution of o&M. this provides concrete
more accessible and affordable if they can demonstrate properly developed information for the first time to the whole offshore wind industry including
o&M policies and costings for their planned wind farms; operationally because policy setters, R&D organisations, investors and manufacturers as well as wind
people need to know what challenges they are likely to face throughout the farm operators and developers.
wind farm lifetime.
Because of the confidential nature of the source data, some information is
however, while in broad terms the industry is aware of problems arising from presented as averages, aggregates or in an anonymised fashion. however, this
unforeseen failures or costs, objective data related to costs and performance provides the only comprehensive and coherent opportunity to benchmark o&M
has been hard to obtain from multiple sites to provide reliable benchmarks for activities, costs and performance against the rest of the industry.
o&M performance and practices.
this stUDy WiLL BEnEFit:
» Offshore wind farm owners maximising long term revenues
» Developers planning cost efficient offshore wind farms
» Investors forecasting financial returns from wind farms
» Policy-makers evaluating efficient long term incentives for offshore wind
» Manufacturers developing more reliable components and systems
» Transport and access providers evaluating business opportunities
» Researchers developing more robust wind farm technology and systems
aBoUt t.a. Cook REsEaRCh & stUDiEs
T.A. Cook is a firm focusing on Asset Performance Management with offices in Berlin, T.A. Cook typically works with businesses, suppliers and contractors working with
Birmingham, London, Raleigh and Rio de Janeiro. Its skills include consulting, events significant industrial assets. The company has particular expertise in the oil & gas,
and research to improve the operational performance of asset-intensive industries petrochemicals, plastics, pharmaceutical, transport, mining and food sectors as well
worldwide. as gas, water and electricity utilities.
T.A. Cook Research & Studies delivers unique research tailored to the needs of specific www.tacook.com
industries. Study areas currently include industrial shutdown and turnaround
management, RFID as well as O&M in the offshore wind energy industry.

3. ContEnt
1 Management summary 5.4 key Performance indicators for o&M
5.4.1 KPIs for O&M work preparation and
2 German summary scheduling
5.4.2 KPIs for materials and procurement
3 Background and objectives 5.4.3 KPIs for the work order process
3.1 objectives 5.4.4 KPIs for financial performance
3.2 importance and role of o&M for operators, 5.5 offshore o&M organisation
developers, financiers and insurers 5.6 Wind farm transfer and access strategies
3.3 Methodology and approach
6 trends, opportunities and risks
3.4 offshore wind farms – an overview
6.1 Evolution in asset design and manufacturing
3.4.1 Existing offshore wind farms
3.4.2 Planned offshore wind farms 6.2 technological evolution to improve failure
prediction
4 Life Cycle Cost of offshore wind power 6.2.1 Gearbox and Bearing
4.1 Cost elements 6.2.2 Generators
4.1.1 CAPEX for planning and installation 6.2.3 Power Electronics and Electric Controls Study Scope
4.1.2 Operations and Maintenance Cost 6.2.4 Rotors and blades
6.2.5 System-Level Fault Detection and Response
4.2 Lifetime cost
6.3 Developments in wind farm accessibility
4.3 asset reliability impact on oPEX
6.4 Changes in the o&M Market
5 o&M in existing offshore wind farms 6.5 o&M Bottlenecks
5.1 Wind farm certification and inspection 6.6 Conclusions
5.1.1 Drivers for certification and inspections
5.1.2 Types of inspection 7 appendices
5.2 o&M strategies 7.1 List of figures
5.2.1 Major elements of O&M strategies 7.2 List of tables
5.2.2 Impact of O&M strategies on wind farm
7.3 References
design
5.3.1 Reactive (corrective) maintenance
5.3.2 Scheduled preventive maintenance
5.3.3 Condition based maintenance
cuStoMISed
INFoRMAtIoN SeRVIce
On request, T.A. Cook can customise your report to meet
your specific needs. Do you want to see how your wind
farm compares with the rest of Europe? Do you want
to test your OPEX predictions against current figures?
Contact us and we can arrange to create and send you a
unique report matching your needs.

4. study Europe: offshore Wind Farm operations & Maintenance
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ContaCt
For further information on this study or on T.A. Cook’s Research & Studies group, please contact Mateus Siwek at: Tel.: +49 (0)30 - 88 43 07 0
email: m.siwek@tacook.com | T.A. Cook & Partner Consultants GmbH | Leipziger Platz 2 | 10117 Berlin | Fax: +49 (0)30 - 88 43 07 30 | www.tacook.com