2015.4.16 NORCOWE science meets industry @ Stavanger

Development of wind sensing lidar “DIABREZZA” at Mitsubishi Electric Corporation 2015.4.16 Shumpei Kameyama Mitsubishi Electric Corporation 1

Self introduction ~ Lidar development in Mitsubishi ~ • Wind sensing coherent Doppler lidar (1998~) S. Kameyama et al., Applied Optics., 46, 1953, 2007. S. Kameyama et al., IEEE Trans. on Geosci. Remote Sens., 47, 3560, 2009. S. Kameyama et al., Applied Optics, 49, 5169, 2010. T. Ando et al., Proc. of Mater. Res. Soc. Symp., 1076-K04-05, 2008. S. Kameyama et al., Proc. of SPIE, 85260E-1, 2012. S. Kameyama et al., Proc. of CLRC, 2013. (Invited)

• CO2 sensing differential absorption lidar (2005~) S. Kameyama et al., Optics Letters, 34, 1513, 2009. S. Kameyama et al., Applied Optics, 50, 1560, 2011. S. Kameyama et al., Applied Optics. 50, 2055, 2011. M. Imaki et al., Optics Letters, 37, 2688, 2012. S. Kameyama et al., Proc. of CLEO Pacific Rim, 2009. (Invited)

• 3D imaging lidar (2007~) S. Kameyama et al., Proc. of SPIE, 7382, 2009. (invited) S. Kameyama et al., Proc. of SPIE, 8192, 2011. (invited) M. Imaki et al., Proc. of SPIE, 8905, 2013. (Invited) N. Kotake et al., Proc. of SPIE, 8565, 2012. H. Tsuji et al., Proc. of SPIE, 8565, 2012. H. Ochimizu et al., Proc. of SPIE, 9080, 2014.

2 ©2015 Mitsubishi Electric Corporation

History of Mitsubishi wind lidar (4) Ultra-long-range (>30 km) wind sensing

(1) Wind sensing using eye-safe (1.5 mm) wavelength region

Long range lidar

Mitsubishi lidar “DIABREZZA” (5) New short range lidar Lidar for offshore wind resource assessment Nacelle mounted lidar

Portable & short range lidar (2) Instrumentation of compact short range lidar

2000

(3) Product release of the short range pulsed lidar

2005

2010

2015

3

©2015 Mitsubishi Electric Corporation

DIABREZZA, compact

4 ©2015 Mitsubishi Electric Corporation

Outline of the product
Measures the vertical wind profile (horizontal wind speed, direction, and the vertical wind speed) of the altitude between 40~250m
Selectable range resolution (20m/25m/30m)
Environmentally resistant for the use under severe outdoor conditions
Can be installed onto a buoy for offshore applications
High performance (measurement accuracy, data availability) using the new function; “Adaptive Parameter Tuning”

5 ©2015 Mitsubishi Electric Corporation

Specification sheet No.

Items

Specifications

Note Varies according to the atmospheric condition

1

Measurement Range

40m～250m altitude

2

Scanning Pattern

Digital switching

3

Scanning Direction

0°(North) / 90°/ 180°/ 270°/

4

Range Resolution

Selectable from 20m/ 25m/ 30m

5

Number of Range

40 ranges

6

Output/Display Data

・horizontal wind speed/direction, vertical wind speed of each range ・10min average data

7

Measurable Wind Speed Range

0～60m/s

8

Data Update Rate

0.25 ～ 5 seconds

9

Wind Speed/Direction Accuracy Error 0.1m/s

10 min average

10

Laser Wavelength

1.55µm single frequency

Class 1M standard (JIS C 6802)

11

Environmental Conditions

-20℃～+40℃、0～100%RH

12

Environmental Resistance

IP67, salt air resistance

13

Main unit Measurement/ weight

W550xH550xD550mm / 50kg

Vertical

DC+24V 14

Power specification

Power Consumption： approx. 180W at temp. -20～0℃ approx. 65W at temp. 0～20℃ approx. 100W at temp. 20～40℃

※The above specifications is subject to change without notice

5 directions Each resolution mode can be divided into 1/2 to 1/5 using the Range Overlap Function

Variable

Excludes projections For customers who require AC Power （AC100～240V±10%、50/60Hz±5% ）, we provide an optional AC-DC converter box.

6 ©2015 Mitsubishi Electric Corporation

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 parameters Patents were filed by Mitsubishi Electric Corp. which fits best to the user’s needs. 20

Effect of parameter tuning

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

15

SNR [dB]

Schematic of range dependence of signal to noise ratio (SNR) 20

Normal atmospheric condition

10

Severe condition (for example, low aerosol density)

Detection threshold

5

5

Recognition of atmospheric condition & parameter tuning

Detection threshold

0 0

15 50

100

150 Range [m]

200

250

300

Data available even in severe atmospheric condition

100

150 Range [m]

200

250

300

Example 2 Ensures available data by tuning laser beam focus (for example, from 300m to 150m)

0 0

50

20

SNR [dB]

SNR [dB]

15

10

10

5

Detection threshold

0 0

50

100

150 Range [m]

200

250

300

7

©2015 Mitsubishi Electric Corporation

Measurement campaign at European test site Measurement campaign at ECN (Netherlands) using the prototype model Period: 2013.10.30~2014.1.7 Field testsite

Office Office

Mast 4

Entrance

Office

Field testsite

Mast （100m）

Reference anemometer

Alkmaar

Lidar Amsterdam

-8-

©2015 Mitsubishi Electric Corporation

Verification result at ECN test site - 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

Wind speed

Wind direction

-9-

©2015 Mitsubishi Electric Corporation

DIABREZZA, nacelle mounted

Photo; provided by Advanced Industrial Science and Technology

10 ©2015 Mitsubishi Electric Corporation

Nacelle mounted lidar

Optical Antenna Unit

Lidar Unit

11 ©2015 Mitsubishi Electric Corporation

Specifications No.

Items

Specifications

Note

1

Measurement Range

Horizontal distance 50m～250m

Varies according to the aerosol condition

2

Scanning Pattern

Digital switching (9 directions)

3

Scanning Alignment Range

Horizontal： -15°、0°、+15°(3 directions) Vertical： -10°、0°、+10°(3 directions)

Straight forward is written as 0° Total of 9 directions

4

Range Resolution

Selectable from 25m/30m/50m

Each resolution mode can be divided into ½ ~ 1/5 with the range overlap function

5

Number of Range

20 ranges

Option: 40 ranges

6

Output/Display Data

Wind speed/direction data for each range

7

Measurable Wind Speed Range

-40～＋20m/s

8

Data Update Rate

3.2 seconds

9

Wind Speed Accuracy Error

0.1m/s

10 min average

10

Laser Wavelength

1.55μm single frequency (eyesafe wavelength)

Class1M standard (JIS C 6802)

11

Environmental Conditions

-20℃～+40℃、0～100%RH

12

Environmental Resistance

IP65, survival wind speed： > 70m/s

13

Measurement/Weight

Lidar unit: W400mm×D500mm×H650mm、50kg Optical Antenna Unit: W400mm×D500mm×H400mm、 40kg

14

Power Input

AC100～240V±10%、50/60Hz±5%

“-” Represents incoming wind “+” Represents escaping wind

Power Consumption of Lidar unit： 300VA 15

Compliance

CE mark, RoHS

12 ©2015 Mitsubishi Electric Corporation

R&D for wind turbine control in AIST AIST: Advanced Industrial Science and Technology (Japan)

Photos and figure; provided by AIST

13 ©2015 Mitsubishi Electric Corporation

DIBREZZA, long range

Photo; provided by Hokkaido University.

14 ©2015 Mitsubishi Electric Corporation

System configuration Chiller

Block diagram Water （Supply）

LD power supply Water （Return）

Optical antenna unit

1.48µm pump light

Pump LD unit

Pump unit for 1st post amplifier

0.94µm pump light

Polarization monitor light Polarization controller signal Signal light

Signal seed pulse

1st post amplifier (EYDF)

Optical Transmitter / Receiver unit

LD driver current

Circulator PBS λ/4

2nd post amplifier (Er,Yb:glass planar waveguide)

Signal light

Telescope Received light

Received light Received signal

Signal processor unit Transmitted Telescope Received Post amplifier (1st and 2nd)

Same as compact lidar 15 ©2015 Mitsubishi Electric Corporation

Ultra-long range wind sensing demonstration (1) Range dependence of detectability and LOS wind velocity ・Resolution：300m, N：16000（10～35km） 20

15

35

15

30

10

30

25

5

20

0

15

-5

Detectability Velocity

Detectability [dB]

35

Detectability [dB]

40

Velocity [m/s]

20

25

5

20

0

15

-5

-10

10

5

-15

5

0

-20

0

10

Detection line

0

5

10

15

20

-10

Detection line -15 -20 10

25

15

・Resolution：150m, N：4000（10～22km） Detectability Velocity

5 0 -5

Detection line

Velocity [m/s]

Detectability [dB]

10

10

30

35

・> 30 km

15

15

25

Measurable range

20

20

20 Range [km]

Range [km]

25

10

Detectability Velocity

Velocity [m/s]

・Resolution：300m, N：16000（～25km） 40

（Resolution: 300m, N: 16000） ・> 20km (Resolution: 150m, N: 4000)

-10

5 -15 0

-20 10

12

14

16 Range [km]

18

20

22

N: Accumulation number 16 ©2015 Mitsubishi Electric Corporation

Ultra-long range wind sensing demonstration (2) Example of measurement result with scanning LOS wind velocity

Signal to noise ratio (SNR)

Horizontal scan display Range resolution : 150m, Display range : 30km (radius)

Vertical scan display, Range resolution : 75m, Display range : 15km (radius)

Data was acquired in the joint research of Electronic Navigation Research Institute & Mitsubishi Electric Corporation

17 ©2015 Mitsubishi Electric Corporation

Conclusions Mitsubishi Electric Corporation has 3 types of wind lidar “DIABREZZA” for wind energy application 1. Compact lidar 2. Nacelle mounted lidar 3. Long range lidar for wind resource assessment for turbine control for wide area wind and power performance testing resource assessment

Lower photo; provided by Advanced Industrial Science and Technology

Data was acquired in the joint research of Electronic Navigation Research Institute & Mitsubishi Electric Corporation

18 ©2015 Mitsubishi Electric Corporation

Thank you for your attention!!

19 ©2015 Mitsubishi Electric Corporation