Styleguide Onshore Solutions.

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Answers for energy.

www.siemens.com/wind

Success on solid groundReliable performance and innovation in onshore wind power


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Convincing performanceOnshore wind power, the most familiar form ofrenewable energy, faces bright prospects.

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The demand for electricity generated from renewablesources is growing at a fast pace. Market analysts are pre-dicting a steady growth of onshore projects to meet theglobal demand. In short, onshore wind energy appearsheaded towards a bright future.

Thanks to technical innovation, the generating capacity ofonshore wind power plants can be on par with many con-ventional power plants. Furthermore, efficiency improve-ments in turbine and generator design have madeonshore wind power a viable option even for regions withmoderate wind conditions.

Another trend on the wind power horizon is re-powering,which can help substantially boost the efficiency and thepower output of earlier generation wind power plants.

Siemens is one of the worlds leading suppliers of windpower solutions for onshore, offshore, and coastal sites.The company has a proven track record for delivering windpower projects on time and within budget. As a marketleader, Siemens combines technological innovation, expe-rience, and expertise along the entire energy conversionchain to deliver readily available one-stop solutions.

Designed to comply with major grid codes, onshore windpower solutions from Siemens can come fully plug-and-play ready, thus paving the way for a cleaner and greenerfuture of power generation. They also provide excellentinvestment protection: Siemens is a market leader in

terms of experience and reliability. Onshore wind solu-tions from Siemens are widely renowned for their out-standing availability and durability.

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At West Wind, New Zealand, Siemens supplies one-stop solutions and

a comprehensive range of services for onshore wind power generation

Siemens most popular wind turbine, the SWT-2.3

nacelle, awaiting deployment

As one of the worlds only energy infrastructure compa-nies with proven know-how and expertise throughout theentire energy conversion chain, Siemens is much morethan a wind turbine supplier. Siemens customers benefitfrom products, solutions, and services that have evolvedfrom more than 150 years of technology leadership inpower generation, transmission, and distribution, andfrom unparalleled project management skills based onthree decades of global experience in onshore windprojects.

Siemens presently has production facilities in Europe, theAmericas, and Asia, and the company continues to expand

its global footprint by locating production facilities in allits key market regions.

The strong local presence, optimized supply chain man-agement, and a comprehensive range of services acrossthe entire project life cycle make Siemens a reliable busi-ness partner and the preferred supplier for onshore windpower projects around the globe.

The fine art of performance

Onshore wind power plants are a great contribution to amore sustainable, ecologically sound power generationlandscape. However, like any other power generation proj-ect, wind farms are, first and foremost, expected to gener-ate profit. With this in mind, Siemens has taken everyeffort to design, manufacture, and supply componentsand systems that deliver top-class performance in everyrespect.

This is why Siemens wind turbines can deliver outstandingperformance in line with demanding industry require-ments. Competitive energy yield in all IEC classes, best-in-

class electrical capabilities, and advanced noise controlcan all help contribute to high availability, making thecompany a high performer in every respect.

Spearheading innovation,providing reliabilityWhen decades of experience pay off

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The spirit of innovation

Continuous innovation drives onshore wind power. Thecommitment to innovation at Siemens can be felt in everyproduct, service, and solution. Constantly striving to bebetter has led to Siemens providing market-leadingtechnology.

However, innovation requires a solid foundation. That isexactly what 30 years of experience in onshore windpower have provided. It is the solid heritage all Siemenswind turbines have in common.

Meticulous testing and an overtly careful product release

policy help Siemens deliver technically mature products tothe market. The latest example is the worlds first compactdirect drive wind turbine with a 3 MW capacity. Siemensthoroughly tested direct drive technology before produc-ing the first prototypes. The prototypes will be extensivelytested before being moved into serial production. It isthis commitment to quality and performance that makeSiemens wind turbines deserved of their reputation.

The benefits of superior technology

Over the years, Siemens wind turbines have set the stan-dard for robustness and reliability. Designed with the mostdemanding applications in mind, the turbines feature arugged, conservative structural design, mechanical sys-tems designed for low maintenance, and are made fromhigh-quality components. Operational expenses can bereduced through fewer unscheduled services, better ser-viceability, and well-sourced spare parts.

Siemens onshore wind turbines can help yield substantialcapital expenditure savings thanks to their unparalleledelectrical capabilities and their superior SCADA flexibility,

which can help save interface costs. The unique NetCon-verter system, a standard feature of all Siemens onshorewind turbines, allows highly flexible generator operationand can help adapt the power output to relevant grids.

The yaw assembly area. Attention to quality and workmanship

form the foundation for the reliability of Siemens wind turbines

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SWT-3.6 wind turbines

The SWT-3.6 wind turbines offerrotor sizes of 107 and 120 me-ters. The larger swept area cap-tures more wind to provide evengreater energy output, whichmakes these most powerful Sie-mens wind turbines an idealchoice for re-powering.


Siemens SWT-2.3 wind turbinesare available with rotor sizes of82, 93, and 101 meters, whichmakes these turbines a choicefor a broad range of wind condi-tions. They are renowned fortheir outstanding performanceand availability.

SWT-3.0-101 wind turbines

The newest wind turbines fromSiemens have the potential torevolutionize the market: thesmart and compact machinescontain roughly half the parts ofa geared turbine. Early perfor-mance measurements indicateremarkable reliability and perfor-mance.

Reliable workhorses andtrendsetting innovationProven performance across the board



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Convincing innovation

Siemens wind turbines share acommon bond. Each turbine iter-ation has been based upon valu-able experience from previousgenerations. Today, Siemenswind turbines utilize advances inthe fields of aerodynamics,structural dynamics, noise reduc-tion, and grid performance.

Convincing performance

Over 9,000 Siemens onshorewind turbines, providing morethan 11,000 megawatts ofclean, renewable energy, arecurrently in operation all overthe world.

Convincing position

Siemens continues to go fromstrength to strength and is cur-rently on track to be one of theworlds top three suppliersof wind turbines by 2012.

Convincing safety

All Siemens onshore wind tur-bines feature superior designof components and systems tomaximize safe and reliable tur-bine operation.

Convincing services

Beyond the warranty period,Siemens can offer long-termservice and maintenance con-tracts to help provide years ofsafe and reliable operation ofthe wind turbine.

Turbine noise control

Even though Siemens wind turbines are among the quiet-est on the market, noise from wind turbines may, undercertain conditions, affect close neighbors to wind farms.

Stopping turbines to curb noise emissions is not an attrac-tive option, and therefore Siemens has developed aunique system for noise control.

For noise sensitive sites the wind turbine can switch fromnormal operations to noise-adjusted operation basedupon day of the week, time of day, and wind speed anddirection.

Turbine load control

Siemens wind turbines can be delivered with the uniqueTurbine Load Control system, TLC.

The TLC system allows turbine installation on sites wherethe wind conditions exceed the design criteria of theturbine.

The TLC system monitors turbine loads in real time andadjusts turbine operation if actual loads exceed designloads.

TLC allows for dynamic load control and can be tailored toany individual site.

Turbine life monitoring

Most wind turbines will not be exposed to actual loadscorresponding to the design loads and may have a techni-cal life beyond the normal design lifetime. It may be diffi-cult, however, to assess the extent of additional technicallifetime on an individual turbine basis.

The TLC system continuously monitors the actual lifetimeand provides a real-time status of actual life versus designlife. For asset management the knowledge of actualresidual life may provide a very valuable basis for futurerepowering decisions.

Siemens new, compact direct drive wind turbine SWT-3.0-101

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Service crew at work on a SWT-2.3 nacelle

at Farr wind farm, Scotland

Effective servicing of wind turbines requires experienced

service technicians

Rotor

At Siemens, innovation is a means to an end rather thanan end in its own right. Siemens uses state-of-the-art rotorblades combining various best-of-class design features toproduce a superior blade. This offers maximum energyextraction from any available wind resource.

The rotor blades are made of fiberglass-reinforcedepoxy, manufactured using the proprietary SiemensIntegralBlade process. Unlike conventional wind turbineblades, the IntegralBlades are cast in one piece in a closedprocess. The process eliminates glue joints and providesoptimum quality and strength in the blade.

The blades are mounted on double-row pitch bearings fit-ted to a large rotor hub. The pitch actuation system ishydraulic, offering maximum robustness and safety.

Tower

Siemens onshore wind turbines are mounted on tubularsteel towers fitted with internal personnel hoists and lifts.

A prefabricated power module is located at the bottom ofthe tower and provides the platform for the power con-verter, the turbine transformer, and the medium-voltageswitchgear.

Nacelle

The nacelles of the Siemens turbines are ideally suited forsevere operating conditions. Major components such asthe main shaft, the gearbox, and the yaw system are all ofparticularly heavy dimensions.

The automatic lubrication systems have redundant lubri-cant reserves to enable continued operation even if sched-uled maintenance is severely delayed. The nacelles steeland fiberglass canopy design provides optimum lightningand fire protection.

All safety systems are failsafe and have layers of redun-

dancy. Fully integrated climate control and comprehensivesurface protection can also help extend service life.

The overall performance of Siemens turbines is well-proven and all details are designed using Siemens market-leading engineering practices.

Built to lastHigh-quality components make forsuperior systems

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Service and maintenance

Expert service and maintenance at the right time is almostas important for profitable wind power projects as select-ing the right wind turbine equipment. That is why Sie-mens has developed industry-leading predictive servicecapabilities that can help reduce unplanned downtimesand help keep turbines running longer.

Central demand planning, excellent diagnostics capabili-ties, and competent field service teams can offer fastresponse times and well-planned service operations.

Siemens flexible service programs can be adjusted tomatch the owners skill sets, objectives, and interest inparticipation, and local technicians can rely on the back-ing of a global service organization.The comprehensiverange of service and maintenance options, therefore, canhelp owners to maximize revenue and earnings through-out the entire project lifetime.

Monitoring

Siemens turbines are equipped with the unique SiemensWebWPS SCADA system. This system offers remote control

and a variety of status views and useful reports from astandard Internet browser. The status views present infor-mation such as electrical and mechanical data, operationand fault status, meteorological data, and grid stationdata.

Voltage and frequency control, and other grid-relatedadjustments, can be implemented by the integrated parkpilot utility in the WebWPS SCADA system.

In addition to the WebWPS SCADA system, the turbine isequipped with a Web-based turbine condition monitoringTCM system. The TCM system is designed to continuouslycarry out precise condition diagnostics on main turbinecomponents and give early warning of many possiblecomponent problems in real time. Based on the TCM sys-tem, Siemens can detect and correct many problems at anearly stage, which can help reduce maintenance costs,

optimize availability, and maximize energy output.Grid performance

Grid stability requirements grow as more wind power isfed into the grid, and Siemens sets the standard in thefield of grid compliance.

Power conversion is implemented with SiemensNetConverter system. This system is characterized byfull conversion of the power generated, efficiently decou-pling generator and turbine dynamics from the grid. TheNetConverter system can offer maximum flexibility in theturbine response to voltage and frequency control, faultride-through, and output adjustment. As a result, Siemens

wind turbines can be configured to comply with a varietyof relevant grid codes in major markets and can be readilyconnected to the grid.

Local service technicians have the backing of a global

service organization

Siemens service technicians are dedicated to caring for

wind turbines

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30 years of experience

From the first 22-kW-rated wind turbine sold by BonusEnergy up to the multi-megawatt turbines manufacturedby Siemens today, Siemens products have helped harnessthe power of wind.

During 30 years of continuous presence in the wind indus-try, wind turbines manufactured by Bonus Energy andSiemens have gained a reputation for high quality, logicaland solid design, and continuous innovation. Today,Siemens offers the largest series-production wind turbineon the market SWT-3.6. Siemens is deserved of its repu-tation for creating innovative wind turbines that deliverreliable performance.

Big is beautiful

The large-scale wind farms developed in recent yearsrequire significant project management know-how inorder to be completed successfully. Siemens has extensiveexperience in this field and has proven itself as a compe-tent supplier of large, complex projects. In 2009, Siemenswas awarded the contract for the UKs largest onshorewind power plant project, Clyde wind farm in Scotland.

Long-standing worldwide expertisein onshore wind power plantsMore than 20 years of experience and over two gigawattsof installed capacity

Wolfe Island

2008

Location: near Kingston,Ontario, Canada

Rated capacity: 86 x 2.3 MW(197.8 rated MW total)

Windy Flats and Tuolumne Wind Farms

2009

Location: Near Goldendale,Washington, USA


Whitelee

20082009

Location: 15 km outsideGlasgow, Scotland

Rated capacity: 40 x 2.3 MW(92 rated MW total)

Extension: 100 x 2.3 MW(230 rated MW total)

A B C

Selected references from key regions

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West Wind

2009

Location: West of Wellington,New Zealand


Specific feature: challenging location

Smla

2002/2005

Location: Smla, NorwayRated capacity: 20 x 2 MW

(40 rated MW total)Extension: 48 x 2.3 MW

(110.4 rated MW total)

Xinjiang

1989

Location: Xinjiang Province,China

Rated capacity: 13 x 150 KW(2.0 rated MW total)

Specific feature: Asias first wind farm

D E F

MW = megawattKW = kilowatt

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105782 102 311392

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88105

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Number of installed wind turbines per country (8,735 wind turbines worldwide)

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Published by and copyright 2012:Siemens AGEnergy Sector

Freyeslebenstrasse 191058 Erlangen, Germany

Siemens AGSiemens Wind PowerLindenplatz 220099 Hamburg, Germanywww.siemens.com/wind

For more information, please contactour Customer Support Center.Phone: +49 180 524 70 00Fax: +49 180 524 24 71(Charges depending on provider)

E-mail: [email protected]

Wind Power DivisionOrder No. E50001-W310-A152-V1-4A00Printed in GermanyDispo 34804 c4bs No. 7491fb 4175 W WS 05121.5

Printed on elementary chlorine-freebleached paper.

All rights reserved.Trademarks mentioned in this documentare the property of Siemens AG, its affiliates,or their respective owners.

Subject to change without prior notice.The information in this document containsgeneral descriptions of the technical optionsavailable, which may not apply in all cases.The required technical options should thereforebe specified in the contract.

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