tm-sfw0205 development of mitsubishi electric’s wind lidar ... · development of mitsubishi...

TM-SFW0205

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Development of Mitsubishi Electric’s wind lidar

“DIABREZZA”~ status and proposal for

offshore wind energy~2015.5.28

ＹｕｔａｋａＫａｊｉｙａｍａShumpei 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 ~


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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


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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)


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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


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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”


� 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


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


Recent measurement campaign

Photo & Data; Provided by Eurus EnergyHoldings Corporation

Measurement campaign at the field in Hokkaido (Japan) was successfully completed


Track record 7:(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


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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”



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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


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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


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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).


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


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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


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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


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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 result was obtained at the ECN test site


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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.

0

5

10

15

20

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

0

5

10

15

20

0 50 100 150 200 250 300

SN

R [

dB

]

Range [m]

Example 1Ensures available databy tuning measurement interval(for example, from 1s to 10s)

Recognitionof atmospheric condition& parameter

tuning

0

5

10

15

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0 50 100 150 200 250 300

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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