www.nidec-asi.com

Wind Farm ApplicationsWind Farm Applications

Energy

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NIDEC ASI in EnergyNIDEC ASI in Energy

NIDEC ASI has been providing variable speed drive systems, generators, static excitationsystems and soft starters for auxiliary equipment in all types of power stations, including

nuclear, worldwide for over forty years. Recently, we expanded our product basket to includeturn-key substations for Transmission and Distribution, HVDC and FACTS. As a leading

expert in Power Quality issues we are able to assist customers in the rapidly developing fieldof renewable energy where we can help design robust systems that integrate seamlessly with

the existing energy network.

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generator

AFE converter transformerMCB

MV

micro

grid

HV grid

static VARcompensationand filtering

HV

substation

single

unit

control

system

wind

farm

control

system

MCB

NIDEC ASI Wind System Know-howA fully integrated electrical package from Generator to Grid

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Technologies Currently in use

Gearbox + standard induction

Gearbox + doubly fed induction (DFIG)

Direct Drive Wound Synchronous

Direct Drive Permanent Magnet

Gearbox + multiple permanent magnet

Gearbox + Permanent Magnet(Hybrid PM)

NIDEC ASI’sExperience and reccommended

technologies for Wind Farmapplications

Multi MW Generators forWind Power Systems

Overview of Know-how

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(gearbox) + standard induction + (inverter/AFE)

GCB 500 Y6

2300 kW

1815 rpm

690 V

Simple, cost effective

“off the shelf”

solution

400…10000 kW

690V…

3.3kV…10kV

Multi MW Generators forWind Power Systems

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higher efficiency

(enhanced at partial load

operation)

higher reliability

a series of advantages wellmatched to wind systemrequirements

2 MWe

15 rpm

3.3 kV

D=4 m

Mact27 ton

3 MWe

14.3 rpm

3.3 kV

D=5.3 m

Mact40 ton

Slightly more expensive & heavier than double fed induction generator + gearbox

systems, it is technically superior, offering:

higher operation flexibility

Multi MW Generators forWind Power Systems

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Naturally born MV

Flexible and energy efficient

True overload

Fault tolerant

Easy modular repair

Grid friendly

Low cogging torque

Low ripple torque

Off shore ready

Long term stable

Lightweight

Easy to transport

3.3 kV

96% + good partial load

no overload if env<20°C

P’50%

small removable modules

All international rules ok

Tcog 0.02%

Tripple 1.8%

Corrosion resistant mats

Low & centering bearing

Mact_3MW 40 ton

3MW 5m / 2MW 4m

Multi MW Generators forWind Power Systems

Our Direct Drive Permanent Magnet - Design Features

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3MW PM DD behavior

Multi MW Generators forWind Power Systems

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Multi MW Generators forWind Power Systems

Our Hybrid Permanent Magnet Generator Solutions

Best fit for offshore applications

Medium Speed (w/single stage gearbox)100 to 500 r/min

High Speed (w/multiple stage gearbox)> 500 r/min

• Weight and Dimensions• Higher efficiency• Low torque ripple• Low cogging torque• Higher availability• Modularity• Lower Maintenance costs

• MV solutions (simplifies cabling and auxiliaries reducing cost)• IP54 protection: stator has force fluid cooling and rotor cooling is by forced air in closedloop improves resistence to harsh enviornmental conditions.

ADVATAGES

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Feasibility study completed

Project has demonstrated thatmachine offers the samepositive features as thetraditional hybrid plus

• Even higher efficiency• Better torque regularity

- Extremely low torque ripple- Complete absence of

cogging torque

Allowing operation at higherspeeds with consequentreduction of dimension andweight

Multi MW Generators forWind Power Systems

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Typical solution for Low Voltage applications up to 2 MW

G3ph

Power converter topology

Power Electronics forWind Power Systems

Our Power Converter Technology – Low Voltage Solution

Power converter topology

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Typical solution for Medium Voltage applications for 1,5 – 5MW

All NIDEC ASI drives for Wind FarmApplications are capable of thefollowing:

• Dynamic Balancing of energy loads• Active Power Control• Reactive Power Control• Fault ride through

Power converter topology

Power Electronics forWind Power Systems

Our Power Converter Technology – Medium Voltage Solution

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Power Electronics forWind Power Systems

Control System Architecture –an Example

NIDEC ASI assures seamless integration with othersystems in the plant

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Power Electronics forWind Power Systems

Our Innovative System Control card for Seamless Integration

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Generator bus

sE

LI

Load busCI

P

LOAD

CE

SILCOVAR PLUS

QP

X

Generator bus

sE

LI

Load busCI

P

LOAD

SILCOVAR PLUS

QP

Generator bus

sE

LI

Load busCI

P

LOAD

SILCOVAR PLUS

QP

X

Q

CLS III

Generator bus

sEsE

LILI

Load busCICI

PP

LOAD

CE

CE

SILCOVAR PLUS

QP QP

X

Generator bus

sEsE

LILI

Load busCICI

PP

LOAD

SILCOVAR PLUS

QP QP

Generator bus

sEsE

LILI

Load busCICI

PP

LOAD

SILCOVAR PLUS

QP QP

X

Q

CLS III

SILCOVAR plus controls the reactive power flow in the electrical line, injecting or absorbing it

Capacitive operating mode

-Q sE

CE

CI

sE

CE

CI

cIXj-Q sE

sE

CE

CE

CI

CI

sE

sE

CE

CE

CI

CI

cIXj

Inductive operating mode

cIXj

+QsE

CE

CI

sE

CE

CI cIXj

+Q

sE

sE

CE

CE

CI

CI

sE

sE

CE

CE

CI

CI

Static VAR Compenstationand Active Filtering

Our SilcoVAR Plus – Main features

SILCOVAR plus can suppress harmonics produced by nonlinear loads

The high equivalent switching frequency allows the dynamic filtering of load harmonic currentsup to 2 kHz

SILCOVAR plus has the ability to maintain full capacitive and inductive output current at lowsystem voltage which also make it very effective in improving transient stability

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TRANSFORMERLESS CASCADED H – BRIDGE MULTILEVEL CONVERTER - STAR CONNECTION

CE

CI

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

HBRIDGE

Voltage and Current (X10)Waveforms of 19 level Cascading Inverter

Capacitive operating mode

Inductive operating mode

Static VAR Compenstationand Active Filtering

Our SilcoVAR Plus – Schematics

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Current Projects15 MW onshore Wind Farm using Direct Drive Permanent Magnet

Qty 10 - GT5A11K7K1.5 MW Wind GeneratorsConfiguration:Synchronous generator (windside) + active front end (gridside)

Synchronous permanent magnetgenerators:Rated Power: 1500 kWRated Current 1255 ARated Line Voltage (at no load)690 V (magnet voltage)Rated Frequency: 20.3 Hz

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Current ProjectsIndustria 2015 - Simplified Schematic of Offshore Floating Wind Farm

1. Generator2. AFE Converter3. Transformer4. MV Network (Microgrid)5. Network Connection6. Microgrid control system

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NIDEC ASI’s StrengthsAble to supply present and future needs

• Strong System Know-how• Nearly a century of experience in the design, manufacture and supply of electrical rotatingmachinery with a long standing reputation for reliability• Full system testing capability (complete string test)• Expertise in high torque applications (such as Metals, Cement, Oil & Gas, Marine)• Can supply fully integrated electrical package – reduced number of interfaces, improvedreliability and availablity of the entire system plus optimized efficiency for site conditions.

Ride Through Capability

Line Side _ Clean Power Filter

Generator Side Low Torque Ripple

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Ready for the futureAble to supply present and future needs

NIDEC ASI has consolidated experiencein the design and supply of PowerElectronics for Marine applicationsrequiring demanding performance inharsh environments - fundamental fornear-shore and offshore applications

(Shown at left MV drive for Offshore platform. Alsoshown, Recent project: Russian Icebreaker)

NIDEC ASI isa valid partner for permanent magnetgenerator systemsfor Wind Farm Applications, both as asupplier of state-of-the-art technology andas a partner for the development of futurehigh power solutions, particularly offshore.

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