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   Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com Class 1 Document no.: 0004-6207 V05 2010-11-19 General Specification V90–1.8/2.0 MW 50 Hz VCS : s ocument contans vauae conenta normaton o estas n ystems /. t s protecte y copyrgt aw as an unpuse wor. estas reserves a patent, copyrgt, trade secret, and other proprietary rights to it. The information in this document may not be used, reproduced, or disclosed except if and to the extent rights are expressly granted by Vestas in writing and subject to applicable conditions. Vestas disclaims all warranties except as expressly granted by written agreement and is not responsible for unauthorized uses, for which it may pursue legal remedies against responsible parties.  Document no.: 0004-6207 V05 General Specification  Table of Contents   Date: 2010-11-19 Issued by: Technology R&D Class: 1 Type: T05 - General Description Page 2 of 79 Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com Table of Contents 1   General Description ............................................................................................................. 5   2   Mechanical Design ............................................................................................................... 5   2.1   Rotor ...................................................................................................................................... 5   2.2   Blades .................................................................................................................................... 5   2.3   Blade Bearing ........................................................................................................................ 6   2.4   Pitch System .......................................................................................................................... 6   2.5   Hub ........................................................................................................................................ 7   2.6   Main Shaft ............................................................................................................................. 7   2.7   Bearing Housing .................................................................................................................... 7   2.8   Main Bearings ........................................................................................................................ 7   2.9   Gearbox ................................................................................................................................. 7   2.10   Generator Bearings ................................................................................................................ 8   2.11   High-Speed Shaft Coupling .................................................................................................... 8   2.12   Yaw System ........................................................................................................................... 8   2.13   Crane ..................................................................................................................................... 9   2.14   Tower Structure ..................................................................................................................... 9   2.15   Nacelle Bedplate and Cover ................................................................................................ 10   2.16   Cooling ................................................................................................................................ 10   2.17   Water Cooling System ......................................................................................................... 11   2.18   Gearbox Cooling .................................................................................................................. 11   2.19   Hydraulic Cooling ................................................................................................................. 12   2.20   VCS Converter Cooling ........................................................................................................ 12   2.21   Generator Cooling................................................................................................................ 13   2.22   HV Transformer Cooling ...................................................................................................... 13   2.23   Nacelle Conditioning ............................................................................................................ 13   3   Electrical Design ................................................................................................................ 14   3.1   Generator ............................................................................................................................ 14   3.2   HV Cables ........................................................................................................................... 15   3.3   Transformer ......................................................................................................................... 16   3.4   Converter ............................................................................................................................. 16   3.5    AUX System ........................................................................................................................ 17   3.6   Wind Sensors ...................................................................................................................... 17   3.7   Turbine Controller ................................................................................................................ 18   3.8   Uninterruptible Power Supply (UPS) .................................................................................... 19   4   Turbine Protection Systems.............................................................................................. 19   4.1   Braking Concept .................................................................................................................. 19   4.2   Short Circuit Protections ...................................................................................................... 19   4.3   Overspeed Protection .......................................................................................................... 20   4.4   EMC System ........................................................................................................................ 20   4.5   Lightning Protection System ................................................................................................ 20   4.6   Earthing (Also Known as Grounding) ................................................................................... 20   4.7   Corrosion Protection ............................................................................................................ 21   5   Safety .................................................................................................................................. 21   5.1    Access ................................................................................................................................. 21   5.2   Escape ................................................................................................................................. 21   5.3   Rooms/Working Areas ......................................................................................................... 22   5.4   Platforms, Standing and Working Places ............................................................................. 22   5.5   Climbing Facilities ................................................................................................................ 22   5.6   Moving Parts, Guards and Blocking Devices ........................................................................ 22   5.7   Lighting ................................................................................................................................ 22   5.8   Noise ................................................................................................................................... 22   5.9   Emergency Stop .................................................................................................................. 22    Document no.: 0004-6207 V05 General Specification  Table of Contents   Date: 2010-11-19 Issued by: Technology R&D Class: 1 Type: T05 - General Description Page 3 of 79 Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com 5.10   Power Disconnection ........................................................................................................... 23   5.11   Fire Protection/First Aid ....................................................................................................... 23   5.12   Warning Signs ..................................................................................................................... 23   5.13   Manuals and Warnings ........................................................................................................ 23   6   Environment ....................................................................................................................... 23   6.1   Chemicals ............................................................................................................................ 23   7   Approvals, Certificates and Design Codes ...................................................................... 24   7.1   Type Approvals .................................................................................................................... 24   7.2   Design Codes – Structural Design ....................................................................................... 24   7.3   Design Codes – Mechanical Equipment ............................................................................... 25   7.4   Design Codes – Electrical Equipment .................................................................................. 25   7.5   Design Codes – I/O Network System ................................................................................... 26   7.6   Design Codes – EMC System .............................................................................................. 26   7.7   Design Codes – Lightning Protection ................................................................................... 27   7.8   Design Codes – Earthing ..................................................................................................... 27   8   Colour and Surface Treatment .......................................................................................... 27   8.1   Nacelle Colour and Surface Treatment ................................................................................ 27   8.2   Tower Colour and Surface Treatment .................................................................................. 28   8.3   Blades Colour ...................................................................................................................... 28   9   Operational Envelope and Performance Guidelines ....................................................... 28   9.1   Climate and Site Conditions ................................................................................................. 28   9.1.1   Complex Terrain .................................................................................................................. 29   9.1.2    Altitude ................................................................................................................................. 29   9.1.3   Wind Farm Layout................................................................................................................ 29   9.2   Operational Envelope – Temperature and Wind .................................................................. 29   9.3   Operational Envelope – Grid Connection* ............................................................................ 30   9.4   Operational Envelope – Reactive Power Capability ............................................................. 31   9.5   Performance – Fault Ride Through ...................................................................................... 32   9.6   Performance – Reactive Current Contribution ...................................................................... 33   9.6.1   Symmetrical Reactive Current Contribution.......................................................................... 33   9.6.2    Asymmetrical Reactive Current Contribution ........................................................................ 34   9.7   Performance – Multiple Voltage Dips ................................................................................... 34   9.8   Performance – Active and Reactive Power Control .............................................................. 34   9.9   Performance – Voltage Control ............................................................................................ 35   9.10   Performance – Frequency Control ....................................................................................... 35   9.11   Performance – Own Consumption ....................................................................................... 35   9.12   Operational Envelope Conditions for Power Curve, C t  Values (at Hub Height) ..................... 36   10   Drawings ............................................................................................................................ 37   10.1   Structural Design – Illustration of Outer Dimensions ............................................................ 37   10.2   Structural Design – Side View Drawing ................................................................................ 38   11   General Reservations, Notes and Disclaimers ................................................................ 39   12   Appendices ........................................................................................................................ 40   12.1   Performance – V90-1.8 MW ................................................................................................. 40   12.1.1   V90-1.8 MW Power Curves .................................................................................................. 40   12.1.2   V90-1.8 MW C t  Values ......................................................................................................... 48   12.1.3   V90-1.8 MW Sound Power Level at Hub Height ................................................................... 56   12.2   Performance – V90-2.0 MW ................................................................................................. 60   12.2.1   V90-2.0 MW Power Curves .................................................................................................. 60   12.2.2   V90-2.0 MW C t  Values ......................................................................................................... 68   12.2.3   V90-2.0 MW Sound Power Level at Hub Height ................................................................... 76    Document no.: 0004-6207 V05 General Specification  Table of Contents   Date: 2010-11-19 Issued by: Technology R&D Class: 1 Type: T05 - General Description Page 4 of 79 Vestas Wind Systems A/S · Alsvej 21 · 8940 Randers SV · Denmark · www.vestas.com Buyer acknowledges that these general specifications are for Buyer’s informational purposes only and do not create or constitute a warranty, guarantee, promise, commitment, or other representation by supplier, all of which are disclaimed by supplier except to the extent expressly provided by supplier in writing elsewhere. See section 11   General Reservations, Notes and Disclaimers, p. 39 for general reservations, notes, and disclaimers applicable to these general specifications.  
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