tm-sfw0205 development of mitsubishi electric’s wind lidar ... · development of mitsubishi...
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TM-SFW0205
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Development of Mitsubishi Electric’s wind lidar
“DIABREZZA”~ status and proposal for
offshore wind energy~2015.5.28
Yutaka KajiyamaShumpei Kameyama
Mitsubishi Electric Corporation
2015.5.28 Japan Norway Energy Science Week , Met-ocean measurements and modeling for offshore wind energy
©2015 Mitsubishi Electric Corporation
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Contents
�What’s wind sensing lidar ?
�Application of wind lidar for wind energy application
�History of Mitsubishi wind lidar
� Introduction of development
~Status and proposal for offshore wind energy ~
©2015 Mitsubishi Electric Corporation
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What’s wind sensing lidar ?
dRX fff += 0
Wind sensing lidar radiates pulse-laser into the air, and receives back-scattered light from aerosols, then calculates wind speed as Doppler shifts.Range information are also obtained from round trip time .
Wind(Movement of the Aerosols)
Optical transceiver/ Receiver
Optical Antenna
c: Speed of light
Transmitting light
Backscattering light
Optical Mixer
fd : Doppler frequencyf0 : Transmitting frequencyfr : Received frequency
fd = 2Vfo/c
Display
Signal Processor
fr = f0 + fd
©2015 Mitsubishi Electric Corporation
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Wind lidar for wind energy application
Wind resource assessment (Ground-based lidar, Floating lidar)
Power performance testing & Wind turbine control (Nacelle mounted lidar)
Wind farm control (Long range, scanning lidar)
©2015 Mitsubishi Electric Corporation
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History of Mitsubishi Electric’s wind lidar
20102000 20152005
(1) Wind sensing using eye-safe (1.5 µµµµm) wavelength region
Long range lidar
(2) Instrumentation of compact short range lidar
Portable & short range lidar
(3) Product release of the short range pulsed lidar
(4) Ultra-long-range (>30 km) wind sensing
Mitsubishi lidar “DIABREZZA”(5) New short range lidar
Lidar for offshore wind resource assessment Nacelle mounted lidar
The lidar in the photo was delivered to Mie university
Offshore campaign(2006) M. Kato et al., Proc. of symposium on wind energy utilization,
Japanese Wind Energy Association, 2008.
Nacelle mounted lidar(2003)
Photo: provided byOkinawa Power Electric Power Company
©2015 Mitsubishi Electric Corporation
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DIABREZZA, compact~ Vertical wind profiling lidar ~
Outline of product� Measures the vertical wind profile
(horizontal wind speed, direction, and the vertical wind speed) of the altitude up to 250m
� Selectable range resolution (20m/25m/30m)
� Environmentally resistant for the use under severe outdoor conditions
� Can be installed in a floating system for offshore applications
� High performance (measurement accuracy, data availability) using the new function; “Adaptive Parameter Tuning”
©2015 Mitsubishi Electric Corporation
� Can be Installed in a floating system with motion correction
and remote power control option
LAN connection (prepared by user)
DC+24VPower
Power cable (5m)Power cable (5m)
Hose (5m)LAN (5m) Power, Signal, LAN cable (5m)
Lidar Main Unit Rinsing Fluid Tank
External unit(motion correction & remote power control)
Installation on floating system
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©2015 Mitsubishi Electric Corporation-8-
First measurement campaign at European test site
Measurement campaign at ECN (Netherlands) using the prototype modelPeriod: 2013.10.30~2014.1.7
Office Field testsite
Mast 4
Entrance
Office
Field testsiteOffice
Alkmaar
Amsterdam
Mast(100m)
Lidar
Referenceanemometer
©2015 Mitsubishi Electric Corporation-9-
Validation result at ECN test site
Wind speed Wind direction
- Wind speed:a=0.986、R2=0.990 , Wind direction:a=1.002、R2=0.998 ���� Satisfy the acceptance criteria of NORSEWInD
Approved by ECN
©2015 Mitsubishi Electric Corporation-10-
Recent measurement campaign
Photo & Data; Provided by Eurus EnergyHoldings Corporation
Measurement campaign at the field in Hokkaido (Japan) was successfully completed
©2015 Mitsubishi Electric Corporation
Track record 7:(in Europe)
Track record 6:(in Europe)
Track record 5:(in Europe)
-11-
Further plan
� Collaboration with the floating system integrator
� Increasing the track record of measurement campaign especially in European test site
Track record 4:(in Japan)
Track record 3:(in Japan)
・・・
Track record 1: ECN
Track record 2: Eurus Energy
©2015 Mitsubishi Electric Corporation
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Optical Antenna Unit
DIABREZZA, Nacelle mounted~ Lidar for turbine performance testing & turbine c ontrol~
Outline of product� Measures the incoming wind with the
distance up to 250m� Selectable range resolution (20m ~)
� Wind distribution measurement in a whole rotor plate with 9 beam configuration
� High performance (measurement accuracy, data availability) using the new function; “Adaptive Parameter Tuning”
The lidar in the photo was delivered to Mie university
©2015 Mitsubishi Electric Corporation
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Current R&D for wind turbine control in Japan
Summary on R&D program in FREA-AIST
Summary on R&D program of MRI project
©2015 Mitsubishi Electric Corporation
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Nacelle mounted lidar is a promising toolfor offshore wind energy
Nacelle mounted lidar realizes …
Power production capacity of offshore wind turbine is getting larger
1. “On site” power curve validation of wind turbines is possible for any wind direction “without any met mast”
2. Distinct increasing of selling electricity (For example, even 2 % improvement of power production produces
the increasing selling electricity of > 200k euros / turbine / year for 5MW turbine)
Extremely high installation cost for offshore met mast (> a few million euros)
3. Longer lifetime of wind turbine (a few tens of percent ?)by the effect of load reduction
©2015 Mitsubishi Electric Corporation
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DIABREZZA, scanning~ Lidar for next generation wind resource assessmen t ~
Outline of product� Ultra long range wind sensing
with the distance of > 8km
� Range resolution: selectable
� Hemispherical measurement using
horizontal & vertical scanning
Photo; provided by Hokkaido UniversityThe range resolution of the lidar in the photois selectable (30m, 60m, 90m).
©2015 Mitsubishi Electric Corporation
Horizontal scan displayRange resolution : 150m,
Vertical scan display,Range resolution : 75m
Wind velocity map measured with scanning
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Capability of ultra-long range wind sensing
Data was acquired in the joint researchof Electronic Navigation Research Institute& Mitsubishi Electric Corporation
30km15km
©2015 Mitsubishi Electric Corporation
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Potential for wind energy applicationon scanning lidar
We have tested for the wind resource assessment(using a compact scanning lidar), and results were fairly good.
Velocity (Cup) [m/s]
Vel
ocity
(Li
dar)
[m/s
]
Range: about 1.6 km
Comparison with met mast data
1.6 km
Photo & Data; provided by Eurus Energy Holdings Corporation
Schematic of measurement method
©2015 Mitsubishi Electric Corporation
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Proposal on utilizing long range scanning lidar
(1) Next generation, wide area wind resource assessm ent• Rough estimation of wind resource and
determination of detailed assessment point
(2) Wide area wind monitoring for wind farm control
• Offshore assessment is possible from onshore
• The 30 km sensing can offer forecasting the coming frozen wind of 30 m/s in advance of 15 min
Scanning lidar can be used for the new application of offshore wind energywhich cannot be realized with vertical profiling lidars
©2015 Mitsubishi Electric Corporation
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ConclusionsMitsubishi Electric Corporation has 3 types of wind lidar “DIABREZZA” for wind energy application
1. Compact lidarfor wind resource assessment
2. Nacelle mounted lidarfor turbine control
and power performance testing
3. Long range lidarfor wide area wind
resource assessment
Data was acquired in the joint researchof Electronic Navigation Research Institute& Mitsubishi Electric Corporation
Lower photo; provided by Advanced Industrial Science and Technology
The lidar in the photo was delivered to Mie university
The result was obtained at the ECN test site
©2015 Mitsubishi Electric Corporation
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Thank you for your attention!!
©2015 Mitsubishi Electric Corporation21
New function: Adaptive parameter tuning
Concept & User’s benefit・Self-recognition of atmospheric condition by the analysis on the signal-to-noise ratio of the received signal.・Automatic optimization of instrumental parameterswhich fits best to the user’s needs. Patents were filed by Mitsubishi Electric Corp.
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5
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0 50 100 150 200 250 300
SN
R [
dB
]
Range [m]
Normal atmospheric condition
Severe condition(for example, low aerosol density)
Effect of parameter tuning
Data available even in severe atmospheric condition
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0 50 100 150 200 250 300
SN
R [
dB
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Range [m]
Example 1Ensures available databy tuning measurement interval(for example, from 1s to 10s)
Recognitionof atmospheric condition& parameter
tuning
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SN
R [
dB
]
Range [m]
Example 2Ensures available databy tuning laser beam focus(for example, from 300m to 150m)
Schematic of range dependence of signal to noise ratio (SNR)
Detection threshold
Detection threshold
Detection threshold
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