Wind Power

Swipe sideways to see the full diagram.

1. 1

   Wind resource

   Kinetic energy of moving air — speed, direction, shear, turbulence, density

2. 2

   Rotor

   Blades turn wind into rotating mechanical power; pitch and yaw keep it in the wind

3. 3

   Drivetrain & generator

   Geared, medium-speed or direct-drive train turns the generator

4. 4

   Conversion

   Power converter and turbine transformer make grid-quality AC

5. 5

   Collection & grid

   33/66 kV array, pooling or offshore substation, export line to the grid

1. 01Wind-resource assessment
2. 02Site & land
3. 03Project development
4. 04Turbine manufacturing
5. 05Component supply
6. 06Foundations
7. 07Offshore infrastructure
8. 08EPC & erection
9. 09Electrical evacuation
10. 10Power generation
11. 11Storage & hybrid
12. 12Power trading
13. 13O&M
14. 14Asset management
15. 15Repowering
16. 16Decommissioning & recycling

Wind Power stays one major sector of the BARREL Energy ecosystem, run as eight independently managed divisions — so a turbine supplier, project developer, EPC contractor, marine infrastructure company and power generator are never treated as the same type of business. Offshore wind is a major industrial division in its own right: steel and heavy fabrication, marine engineering, ports, vessels, subsea cables, offshore substations, transmission and long-term maintenance.

Utility-scale IPP

Large wind parks selling to utilities under long-term PPAs

Captive / group captive

Industry owns or co-owns the plant and draws the power through open access

Hybrid park

Wind and solar share land, pooling substation and transmission

Repowering

Older, smaller turbines replaced with fewer, larger, taller machines

1. 1Wind measurement
2. 2Land & micrositing
3. 3Roads & hardstands
4. 4Foundations
5. 5Erection
6. 633 kV collection
7. 7Pooling substation
8. 8Grid & COD

The full onshore build — land, civil, mechanical erection and electrical evacuation — is on the Onshore Farm Infrastructure tab; repowering and life extension are on O&M and Lifecycle.

Swipe sideways to see the full diagram.

• Monopile

  ≈ 0–60 m

  Single large steel tube driven or drilled into the seabed; the most widely used offshore foundation.

• Jacket

  ≈ 30–70 m

  Lattice steel frame on three or four legs, pinned with piles or suction buckets.

• Tripod / tripile

  ≈ 20–50 m

  Three-legged steel structures spreading the load to three piles.

• Gravity-based

  ≈ 0–40 m

  Heavy concrete or steel base held by its own weight; needs a prepared seabed.

• Suction bucket

  ≈ 20–60 m

  Upturned steel buckets sucked into soft seabed; quieter installation, no piling.

• Other seabed-supported

  Site-specific

  Engineered hybrids for unusual soils, ice or very large turbines.

• Bathymetric surveys
• Geophysical seabed surveys
• Geotechnical investigations
• Metocean studies
• Marine environmental surveys
• Seabed mobility assessment
• Cable-route surveys
• Port and installation feasibility

1. 1Seabed & metocean survey
2. 2Foundation fabrication
3. 3Port marshalling
4. 4Foundation install
5. 5Array & export cables
6. 6Offshore substation
7. 7Turbine install
8. 8Commissioning
9. 9SOV-based O&M

Ports, vessels and marine logistics are on the Marine & Offshore Infrastructure tab.

• Semi-submersible

  ≈ 50 m +

  Three or four buoyant columns linked by pontoons; shallow draft, assembled in port and towed out.

• Spar-buoy

  ≈ 100 m +

  Long ballasted cylinder with deep draft — very stable, needs deep water and sheltered assembly.

• Tension-leg platform (TLP)

  ≈ 50 m +

  Buoyant hull held down by taut vertical tendons; small footprint, little motion, demanding anchors.

• Barge-type

  ≈ 30 m +

  Wide, shallow-draft hull, often with motion-damping moonpool.

• Hybrid floating

  Concept-specific

  Combinations of the above, multi-turbine or shared-mooring concepts.

Catenary mooring

Heavy chain lying on the seabed; weight restores the platform

Taut / semi-taut

Synthetic or wire lines at an angle; smaller footprint

Tension-leg tendons

Vertical steel tendons for TLPs

Drag-embedment anchors

Holding by digging into soft seabed

Suction / driven piles

Vertical load capacity for taut systems

Dynamic cables

Buoyancy modules let the export cable move with the platform

1. 1Hull fabrication
2. 2Quayside turbine assembly
3. 3Tow-out
4. 4Hook-up to pre-laid moorings
5. 5Dynamic cable connection
6. 6Commissioning

Swipe sideways to see the full diagram.

Region I · below cut-in

≈ < 3 m/s — rotor idles, no generation

Region II · partial load

Speed control tracks the best tip-speed ratio for maximum Cp

Region III · rated

≈ 11–13 m/s and above — pitch sheds excess power, output held at rating

Cut-out / storm

≈ 25 m/s (higher with storm control) — blades feathered, rotor parked

v̄ (m/s)

Mean wind speed at hub height — the first screening figure

P/A (W/m²)

Wind power density = ½ ρ v³, averaged over the distribution

α

Shear exponent: v₂ = v₁ (h₂ / h₁)^α

TI (%)

Turbulence intensity = σ / v̄ — sets the IEC turbine class (A/B/C)

ρ (kg/m³)

Air density — falls with altitude and heat; 1.225 at sea level, 15 °C

k, c

Weibull shape and scale parameters of the speed distribution

V_ref / V_e50

Reference and 50-year extreme wind — sets the IEC class I/II/III

Wind rose

Frequency and energy by direction — drives turbine spacing

1. 1Prospecting
2. 2Measurement
3. 3Feasibility
4. 4Permits & land
5. 5Grid & PPA
6. 6Financial close
7. 7Construction
8. 8COD
9. 9Operations

1. 1Foundation cure
2. 2Tower base section
3. 3Mid / top sections
4. 4Nacelle lift
5. 5Hub + blades (or rotor star)
6. 6Cabling
7. 7Mechanical completion
8. 8Commissioning

Quay bearing capacity

Heavy-lift quays for foundations, nacelles and towers

Laydown area

Large yards for blades, towers and monopiles

Water depth & air draft

Access for jack-up and heavy-lift vessels

Proximity

Short transit to the wind zone for installation and O&M

1. 11 kV

   Small and distributed wind, single-turbine connections

2. 22 kV

   Small wind clusters, distribution feeders

3. 33 kV

   Typical onshore collection (array) network

4. 66 kV

   Large-turbine arrays, offshore inter-array cables

5. 110 kV

   Medium wind farm evacuation

6. 132 kV

   Wind farm evacuation to state grid

7. 220 kV

   Pooling station to transmission, offshore export (HVAC)

8. 400 kV

   Large wind / hybrid parks, inter-state transmission

9. 765 kV

   Renewable energy zone corridors

10. HVDC

    Long-distance offshore export and bulk corridors, where technically appropriate

1. 1Raw materials (steel, resin, glass / carbon fibre, copper, magnets)
2. 2Components
3. 3Blades · nacelle · tower
4. 4Turbine assembly
5. 5Transport & logistics
6. 6Installation

1. 1Development
2. 2Construction
3. 3Commissioning
4. 4Operations (≈ 20–30 years)
5. 5Life extension
6. 6Repowering
7. 7Decommissioning & recycling

Time-based availability

Share of hours the turbine is able to run (IEC 61400-26-1)

Energy-based availability

Energy produced ÷ energy possible (IEC 61400-26-2)

Capacity factor / PLF

Energy ÷ (rated power × hours in period)

MTBF / MTTR

Mean time between failures / to repair, per component

Power-curve performance

Measured vs warranted curve (IEC 61400-12)

Lost production

By cause: fault, grid, curtailment, weather, scheduled

• Airborne wind energy systems

  Demonstration

  Tethered wings or drones reaching steadier winds above tower height.

• Tethered kite wind energy

  Demonstration

  Kites pull a ground-based generator in pumping cycles.

• Airborne wind turbines

  Prototype

  Rotors carried aloft; power sent down the tether.

• Vortex-induced vibration systems

  Prototype

  Oscillating mast harvests vortex shedding; small outputs so far.

• Bladeless wind energy concepts

  Prototype

  No rotating blades; claimed niches in urban and low-noise sites.

• Advanced aerodynamic rotor designs

  Development

  Longer, lighter, smarter blades; flaps, tips and load control.

• High-altitude wind energy

  Research

  Jet-stream-level resource; major airspace and tether challenges.

• Floating offshore wind energy hubs

  Planning

  Multi-GW offshore clusters with shared conversion and hydrogen.

• Wind-powered hydrogen production

  Early commercial

  Electrolysers fed by wind, onshore first; offshore in pilots.

• Wind-powered ammonia production

  Pilot

  Green hydrogen converted to ammonia for fertiliser, fuel and export.

• Wind-to-X energy systems

  Pilot

  Wind power to heat, methanol, e-fuels and industrial feedstocks.

• Wind-solar-storage integrated parks

  Commercial

  Shared land and evacuation for firmer, round-the-clock supply.

• AI-controlled wind farms

  Early commercial

  Wake steering, farm-level control and fault prediction.

• Advanced predictive wind forecasting

  Commercial

  Machine-learning forecasts for scheduling, trading and O&M.

• ISO 9001 — quality
• ISO 14001 — environment
• ISO 45001 — occupational health & safety
• ISO/IEC 27001 — information security
• IEC 61400-22 / IECRE OD-501 — certification
• Offshore structural standards (e.g. DNV support-structure standards)
• IEC 60076 — power transformers
• IEC 62271 — HV switchgear
• Submarine power cable standards
• Marine and vessel class rules

Always check the latest edition, amendments and national adoption of a standard before specifying it in a contract.

Independent Power Producer

Own the plant, sell power under a long-term PPA

Captive generation

Industry consumes its own wind power

Group captive

Several consumers co-own a plant under captive rules

Third-party sale

Power sold to a consumer via open access

Open-access supply

Wheeling over the grid to C&I buyers

Merchant generation

Sell on power exchanges and short-term markets

Acquisition & leasing

Buy, lease or redevelop operating wind farms

Development partnerships

Co-develop with landowners, OEMs or investors

BOO / BOOT

Build-own-operate (-transfer) structures

Offshore concession

Seabed lease and long-term offshore rights

Wind-as-a-Service

Energy supplied without the buyer owning assets

Asset management services

Operate and optimise other owners' fleets

CAPEX / OPEX

Capital and operating cost, per MW and per year

Debt : equity

Financing structure, interest and repayment

NPV

Present value of cash flows at the discount rate

IRR

Project and equity internal rate of return

DSCR

Cash available for debt service ÷ debt service

LCOE

Lifetime cost ÷ lifetime energy, discounted

Payback

Years until cumulative cash flow turns positive

P50 / P75 / P90

Energy yield at the chosen exceedance probability

Tariff sensitivity

IRR / DSCR against tariff

Generation sensitivity

IRR / DSCR against wind and yield

Availability sensitivity

Effect of downtime on revenue

FX sensitivity

Imported equipment and foreign debt

Lifecycle cost

Development to decommissioning

1. 01Wind Project Development
2. 02Onshore Wind Power
3. 03Offshore Wind Power
4. 04Floating Wind Power
5. 05Distributed and Small Wind
6. 06Wind Resource Assessment
7. 07Wind Engineering and Consultancy
8. 08Wind EPC and Construction
9. 09Wind Turbine Manufacturing
10. 10Wind Blade Manufacturing
11. 11Wind Tower Manufacturing
12. 12Nacelle and Drivetrain Manufacturing
13. 13Wind Electrical Equipment
14. 14Offshore Foundation Manufacturing
15. 15Offshore Marine Infrastructure
16. 16Wind Power Transmission
17. 17Subsea Cable Infrastructure
18. 18Wind Equipment Procurement
19. 19Wind Equipment Import and Export
20. 20Wind Supplier and Manufacturer Network
21. 21Wind Testing and Inspection
22. 22Wind Certification Support
23. 23Wind Operations and Maintenance
24. 24Wind Asset Management
25. 25Wind Repowering and Life Extension
26. 26Wind Decommissioning and Recycling
27. 27Wind + Battery Storage
28. 28Wind-Solar Hybrid Power
29. 29Wind-to-Hydrogen and Power-to-X
30. 30Wind Power Trading
31. 31Wind Project Finance and Investment
32. 32Wind Port and Logistics Infrastructure
33. 33Wind Digital Intelligence
34. 34Wind Research and Technology Development

Integrated wind power ecosystem

Connecting developers, manufacturers, engineering firms, EPC contractors, suppliers, service providers, investors and power buyers.

Onshore and offshore capabilities

Supporting land-based, marine-based and floating wind infrastructure.

Engineering and infrastructure

Connecting civil, mechanical, electrical, structural, marine and transmission engineering.

Industrial manufacturing

Supporting turbine components, heavy fabrication, offshore structures and electrical equipment.

Global supply chain

Connecting Indian and international manufacturers, suppliers, contractors and technology providers.

Energy integration

Bringing together wind, solar, batteries, hydrogen, transmission and power markets.

Digital intelligence

Engineering tools, equipment databases, project intelligence, cost intelligence and digital operations.

Complete lifecycle support

From initial concept and feasibility to commissioning, operations, repowering and decommissioning.

BARREL — One World. One Power Network.

• IECIEC 61400-1 — Wind energy generation systems: design requirements
• IEC TC 88Wind energy generation systems — the IEC committee that writes IEC 61400
• IRENAWind energy — technology, costs and deployment
• NLR (formerly NREL)Wind energy research — National Laboratory of the Rockies
• NIWENational Institute of Wind Energy — wind resource, testing and offshore
• MNREMinistry of New and Renewable Energy — wind energy
• IEARenewables — renewable electricity outlook, including wind
• GWECGlobal Wind Energy Council — market reports