NIDEC ASI provides electrical systems for wind farms, including generators, power converters, control systems, and static VAR compensation. They have experience supplying direct drive permanent magnet and hybrid permanent magnet wind turbine generators from 1.5-3 MW. Current projects include a 15 MW onshore wind farm using direct drive permanent magnet generators and an offshore floating wind farm design. NIDEC ASI can provide fully integrated electrical packages for wind farms.

1. Energy
Wind Farm Applications
PPT2013.01.01.19EN
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2. NIDEC ASI in Energy
NIDEC ASI has been providing variable speed drive systems, generators, static excitation
systems 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 include
turn-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 field
of renewable energy where we can help design robust systems that integrate seamlessly with
the existing energy network.
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3. NIDEC ASI Wind System Know-how
A fully integrated electrical package from Generator to Grid
HV grid
generator
wind
farm
control
system
MCB
HV
substation
static VAR
compensation
and filtering
single
unit
control
system
MV
micro
grid
MCB
AFE converter
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transformer
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4. Multi MW Generators for
Wind Power Systems
Overview of Know-how
Technologies Currently in use
Gearbox + standard induction
Gearbox + doubly fed induction (DFIG)
NIDEC ASI’s
Direct Drive Wound Synchronous
Experience and reccommended
technologies for Wind Farm
applications
Direct Drive Permanent Magnet
Gearbox + multiple permanent magnet
Gearbox + Permanent Magnet
(Hybrid PM)
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5. Multi MW Generators for
Wind Power Systems
GCB 500 Y6
2300 kW
1815 rpm
690 V
Simple, cost effective
“off the shelf”
solution
400…10000 kW
690V…
3.3kV…10kV
PPT2013.01.01.19EN
(gearbox) + standard induction + (inverter/AFE)
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6. Multi MW Generators for
Wind Power Systems
Slightly more expensive & heavier than double fed induction generator + gearbox
systems, it is technically superior, offering:
higher efficiency
(enhanced at partial load
operation)
higher reliability
higher operation flexibility
a series of advantages well
matched to wind system
requirements
2 MWe
3 MWe
15 rpm
14.3 rpm
3.3 kV
3.3 kV
D=4 m
D=5.3 m
Mact27 ton
Mact40 ton
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7. Multi MW Generators for
Wind Power Systems
Our Direct Drive Permanent Magnet - Design Features
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
PPT2013.01.01.19EN
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
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8. Multi MW Generators for
Wind Power Systems
3MW PM DD behavior
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9. Multi MW Generators for
Wind 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
A
D
V
A
T
A
G
E
S
• 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 closed
loop improves resistence to harsh enviornmental conditions.
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10. Multi MW Generators for
Wind Power Systems
Feasibility study completed
Project has demonstrated that
machine offers the same
positive features as the
traditional hybrid plus
• Even higher efficiency
• Better torque regularity
- Extremely low torque ripple
- Complete absence of
cogging torque
Allowing operation at higher
speeds with consequent
reduction of dimension and
weight
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11. Power Electronics for
Wind Power Systems
Our Power Converter Technology – Low Voltage Solution
Power converter topology
G3ph
Power converter topology
Typical solution for Low Voltage applications up to 2 MW
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12. Power Electronics for
Wind Power Systems
Our Power Converter Technology – Medium Voltage Solution
Power converter topology
Typical solution for Medium Voltage applications for 1,5 – 5MW
All NIDEC ASI drives for Wind Farm
Applications are capable of the
following:
• Dynamic Balancing of energy loads
• Active Power Control
• Reactive Power Control
• Fault ride through
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13. Power Electronics for
Wind Power Systems
Control System Architecture –an Example
NIDEC ASI assures seamless integration with other
systems in the plant
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14. Power Electronics for
Wind Power Systems
Our Innovative System Control card for Seamless Integration
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15. Static VAR Compenstation
and Active Filtering
Our SilcoVAR Plus – Main features

Es
P
  
I S  I L  IC
Generator bus
Capacitive operating mode
-Q

IC
Q

IL

IC
LOAD
Load bus
X
Inductive operating mode

Es

 j  X  Ic

Es
P Q

EC

EC
+Q

IC

EC

 j  X  Ic
SILCOVAR PLUS
SILCOVAR plus has the ability to maintain full capacitive and inductive output current at low
system voltage which also make it very effective in improving transient stability
SILCOVAR plus controls the reactive power flow in the electrical line, injecting or absorbing it
SILCOVAR plus can suppress harmonics produced by nonlinear loads
The high equivalent switching frequency allows the dynamic filtering of load harmonic currents
up to 2 kHz
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16. Static VAR Compenstation
and Active Filtering
Our SilcoVAR Plus – Schematics
TRANSFORMERLESS CASCADED H – BRIDGE MULTILEVEL CONVERTER - STAR CONNECTION
Voltage and Current (X10)
Waveforms of 19 level Cascading Inverter
Capacitive operating mode
H
BRIDGE
H
BRIDGE
H
BRIDGE
H
BRIDGE
H
BRIDGE

IC
H
BRIDGE

EC
H
BRIDGE
H
BRIDGE
H
BRIDGE
H
BRIDGE
H
BRIDGE
Inductive operating mode
H
BRIDGE
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17. Current Projects
15 MW onshore Wind Farm using Direct Drive Permanent Magnet
Qty 10 - GT5A11K7K
1.5 MW Wind Generators
Configuration:
Synchronous generator (wind
side) + active front end (grid
side)
Synchronous permanent magnet
generators:
Rated Power: 1500 kW
Rated Current 1255 A
Rated Line Voltage (at no load)
690 V (magnet voltage)
Rated Frequency: 20.3 Hz
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18. Current Projects
Industria 2015 - Simplified Schematic of Offshore Floating Wind Farm
1. Generator
2. AFE Converter
3. Transformer
4. MV Network (Microgrid)
5. Network Connection
6. Microgrid control system
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19. NIDEC ASI’s Strengths
Able to supply present and future needs
• Strong System Know-how
• Nearly a century of experience in the design, manufacture and supply of electrical rotating
machinery 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, improved
reliability and availablity of the entire system plus optimized efficiency for site conditions.
Generator Side Low Torque Ripple
Ride Through Capability
Line Side _ Clean Power Filter
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20. Ready for the future
Able to supply present and future needs
NIDEC ASI has consolidated experience
in the design and supply of Power
Electronics for Marine applications
requiring demanding performance in
harsh environments - fundamental for
near-shore and offshore applications
(Shown at left MV drive for Offshore platform. Also
shown, Recent project: Russian Icebreaker)
NIDEC ASI is
a valid partner for permanent magnet
generator systems
for Wind Farm Applications, both as a
supplier of state-of-the-art technology and
as a partner for the development of future
high power solutions, particularly offshore.
PPT2013.01.01.19EN
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