List of Figures

Figure 1	Offshore Wind Turbine Component-Wise Failure Rates (Faulstich et al. 2011)
Figure 2	Bathtub Curve Reliability Distribution
Figure 3	Offshore Wind Turbine Failure Severity Landscape (WEU Survey 2011)
Figure 4	Offshore Timely Failure Rates (van de Pieterman et al. n.d.)
Figure 5	Wind Park Configuration (van de Pieterman et al. n.d.)
Figure 6	Damage Accumulation (van de Pieterman et al. n.d.)
Figure 7	Structural Failure and Material Damage Modes (McGugan et al. 2008)
Figure 8	LM Wind Power Blade Condition Monitoring System (Korsgaard 2004)
Figure 9	Offshore Wind Turbine Rotor Blade Bathtub Curve (Cavaco C. 2011)
Figure 10	Tower Damage Factors Breakdown (Mühlberg 2010)
Figure 11	Tower Coating Failure (Guy 2010)
Figure 12	Coating Repair Campaign (Guy 2010)
Figure 13	Offshore Wind Turbine Technological Foundation Landscape (Wybren 2011)
Figure 14	Transition Piece Grouting Improvement (DNV 2011b)
Figure 15	Corrosion in Offshore Wind Energy (van der Mijle Meijer 2009)
Figure 16	4MW PMSG Source (The Switch 2011)
Figure 17	Vibratory Sensor (Verbruggen 2010)
Figure 18	RMS Vibratory Response of a Bearing Pre and Post Replacement (Verbruggen 2010)
Figure 19	Middelgrunden Turbine Transformer Impact on Downtime and Production (J. Larsen et al. 2009)
Figure 20	Turbine Transformer Retrofit Campaign Cost Breakdown (J. Larsen et al. 2009)
Figure 21	Middelgrunden Transformer Replacement (J. Larsen et al. 2009)
Figure 22	Power Collection Grid Topology Outage Duration Comparison (Sannino B. K., 2007)
Figure 23	Conductor Cost Breakdown (GMS 2011)
Figure 24	Cable Fault Landscape (from 1959 to 2006)
Figure 25	Lillgrund String Connections and Power Collector System (Vattenfall 2011)
Figure 26	Lillgrund Offshore Substation (Siemens 2011)
Figure 27	Loss of Production Evolution as a Function of Distance to Port (Cavaco C. 2011)
Figure 28	Planned and Unplanned Maintenance Patterns (Cavaco C. 2011)
Figure 29	Annual In-Situ Interventions (WEU Survey 2011)
Figure 30	SCADA and CMS Alarm Resulting in Turbine Shutdown (WEU Survey 2011)
Figure 31	Analytical 5MW Wind Turbine Power Curve (Wind Energy Update 2011)
Figure 32	Condition-Based Monitoring Repair Strategy Example (Verbruggen 2010)
Figure 33	Gearbox Condition Monitoring
Figure 34	Failure Rate of Sensors Compared to other Turbine Components
Figure 35	Maintenance Strategy Allotted Budget Breakdown (WEU Survey 2011)
Figure 36	Corrective Maintenance Data from OPEX Calculations (Trollnes S. 2010)(WEU Survey 2011)
Figure 37	Risk-Based Decision Tree for O&M Planning (Jessen Nielsen & Dalsgaard Sorensen 2010)
Figure 38	Modified Bathtub Curve for Serial Failure (Olme 2009)
Figure 39	OPEX Budget Breakdown (WEU Survey 2011)
Figure 40	Performance-Based Access and Transfer Design Process (DNV 2011a)
Figure 41	Critical Resource to O&M Activity Execution (WEU Survey 2011)
Figure 42	Example Weather Window for a Monohul Crane (Costache 2010)
Figure 43	Cumulative Distribution Function of the Weather Window (Bussel & Bierbooms 2005)
Figure 44	Offshore Wind Supply Vessel (Catamaran Style) (Force 3 Offshore 2011)
Figure 45	Offshore Wind Support Crew (Force 3 Offshore 2011)
Figure 46	SWATH Boat (Maritime Journal 2010)
Figure 47	Fob Lady Access Boat (Offshore Windservice APS 2011)
Figure 48	Ampelmann’s Active Motion Compensation Gangway System (AMPELMANN 2011)
Figure 49	Offshore Access System (Arabian Oil and Gas 2008)
Figure 50	Helicopter Access to the Nacelle Top (Wind Energy The Facts 2011)
Figure 51	BARD 1's BorWin Alpha's Transformer and Accommodation Platform (Finnern 2010)
Figure 52	Maximum Conditions for Current Installation Vessels (Skiba 2010)
Figure 53	Nexans’ Offshore Skagerrak Cable-Laying Vessel (Scottish Enterprise 2011)
Figure 54	Export Cable Carousel
Figure 55	Export Cable Carousel
Figure 56	Dual Sword Cable Trenching ROV (Blue Offshore 2011)
Figure 57	Singe Sword Cable Trenching ROV (Blue Offshore 2011)
Figure 58	Wind farm sizes and distance to shore from 1991 to 2009 (Oliver Heinecke 2010)
Figure 59	Multi-Purpose Maintenance Vessel Rendering (Scandoil 2011)
Figure 60	DNV-OS-J201 Standard (DNV 2011a)
Figure 61	Emergency Flow Chart Example (GL Garrad Hassan 2011a)
Figure 62	Serious HSE Incident Frequency (Statoil 2011)
Figure 63	Total Recordable HSE Injury Frequency (Statoil 2011)
Figure 64	Immediate Incident Cause Breakdown (GL Garrad Hassan 2011a)
Figure 65	Emergency Response Training (Nielsen 2002)
Figure 66	Emergency Rescue Training (Nielsen 2002)

List of Tables

Table 1	Severity Rating of Failure Mode and Effect Analysis (Durham University, 2011)
Table 2	Failure Mobilization Requirement (Kotsonis 2010)
Table 3	Damage Classification of Offshore Rotor Blades (CP.MAX 2011)
Table 4	Rotor Blade Failure Rates (Cavaco C. 2011)
Table 5	Offshore Wind Turbine Blade Reliability (Sørensen 2007)
Table 6	Blade Aging Timeline (Cavaco C. 2011)
Table 7	Offshore Wind Tower Coating Protection Cost (Guy 2010)
Table 8	Offshore Wind Tower Coating Protection and Offshore Repair Cost Estimation
Table 9	Gearbox Failure Rates (Cavaco C. 2011)
Table 10	Generator Failure Rates (Cavaco C. 2011)
Table 11	Electrical System Failure Rates (Cavaco C. 2011)
Table 12	Control System Failure Rates (Cavaco C. 2011)
Table 13	Offshore Wind Turbine Gearbox and Generator Details
Table 14	Turbine Transformer Failure Rate and MTTR (Holmstrom & Negra 2007)
Table 15	Conductor Failure Rate (Sannino B. K., 2007)
Table 16	Seasonal Mean Time to Repair (Sannino B. K., 2007)
Table 17	Switchgear Failure Rate (Sannino & Breder, 2006)
Table 18	O&M Element Cost Estimate (Cavaco C. 2011)
Table 19	Availability Category (GL Garrad Hassan 2011b)
Table 20	Component-Based Monitoring Examples
Table 21	UK Offshore Round I Economics (10% Discount Rate)
Table 22	Access System Wave Height and Wind Speed Acceptance (Bussel & Bierbooms 2005)(Kotsonis 2010)
Table 23	Maintenance Actions for an Offshore Wind Farm and Their Occurrence (Tveiten 2011)
Table 24	Jack-Up Vessel Market Potential (Nerland 2010)
Table 25	Vessels Used in Offshore Wind Farm Construction in Europe (Kaiser & Snyder 2010)
Table 26	Specification for Newly Built Vessels (Kaiser & Snyder 2010)
Table 27	OPEX Generic Project Cost Breakdown (Scottish Enterprise 2011)
Table 28	Hazards for O&M Work in Offshore Wind Farms (Tveiten 2011)
Table 29	Training Requirements at Lillgrund Offshore Wind Farm (Vattenfall 2011)

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