11 Overview Appropriate Hardware 01

7/30/2019 11 Overview Appropriate Hardware 01

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Deutsches Windenergie - Institut GmbH http://www.dewi.de

Overview AppropriateHardware

Peter Busche

Deutsches Windenergie-Institut GmbH,DEWI Wilhelmshaven


Met mast has a grid connection!

Whole measuring equipment is power by electricityfrom the grid

Met mast has no grid connection!

Whole measuring equipment will be powered by solarpanel with lead-acid battery as buffer


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Wind measurements

Hardware for wind measurements

Met Mast

Sensors for measuring wind speed and wind direction

Sensors for measuring environmental values

Data acquisition and storing devices


Hardware - Met Mast

MetMast

Tubular mast

Lattice mast

Combination of tubular and lattice mast


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Hardware - Met Mast

Tubular

30 m mast


Hardware - Met Mast

Tubular 80 m mast

(telescopic)


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Hardware - Met Mast

Top of 80 m mast


Hardware - Met Mast

Top of telescopic met mast


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Hardware - Met Mast

Lattice mast 80 m

(bottom view)


Hardware - Met Mast

Lattice mast 80 m


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Hardware - Met Mast

People climbing

50 m lattice mast


Hardware - Met Mast


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Hardware - Met Mast

Combination of lattice

and tubular mast 124 m


Hardware - Met Mast

DEWI Platformin the North Sea

Wind measurement up to 100 m

Measurement of mechanicalloads on the platform structure

Biological observations aboveand below sea level


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Wind measurement


Wind measurements

Sensors for measuring wind speed

only calibrated cup anemometers

only anemometers with classification

additional sonic anemometers possibledynamic measurements of turbulence intensityinclined flow (3D)

minimise influences due to mounting effects

mounting arrangement in accordance to

IEC 61400-121 Power performance measurements

operation of heated anemometer only with electricityfrom grid connection

anemometers for site calibration shall be of sametype and shall be calibrated during the samecalibration campaign


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3 D

Acoustic type anemometer: Ultrasonic


Differend Types of Cup Anemometers

Vector type anemometer


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Thies First Class anemometer



Risoe type anemometer


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Differend Types of Direction Vanes

Sensors for measuring wind direction

only high quality wind vane

avoid using combination sensor (anemometer andvane will be influenced by each other)

ensure proper alignment of vane

ensure proper fixation of vane to avoid looseningof vane causing directional drifting over the

measuring campaign minimise directional influences due to mast effects

operation of heated vane only with electricity from

grid connection




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Wind measurements

Sensors for measuring environmental values

only calibrated equipment

only high quality temperature sensor- at least two sensors to measure temp. profile

baro sensor

Rain sensor for power performance measurementhigh current need to dry sensor (grid connection)

Humidity sensor possible

radiation sensor possible

Measurement of produced electrical power only with calibrated currentand voltage transducers

Measurement of additional values

- status signal of wind turbine- RPM of turbine- pitch angle of rotor blades- yaw angle etc.


Temperature / humidity sensor


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Sensor for barometric pressure

Note appropriate measuring range!!- sea level i.e 950 to 1050 hPa

- mountain region i.e 750 to 850 hPa at 2000 m above sea level

note: ISO 2533 Standard Atmosphere


Radiation sensor


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Data acquisition and storage


Reliable data acquisition equipment even underharsh environmental conditions- extreme temperatures- humidity and rain- corrosion- resistend against high high electrical fields fields

due to lightning

Data logger must record data as times series (i.e. 10

minute averages) Data logger with internal sampling rate 1Hz or better

Convenient way to transfer data i.e. via GSM modem




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Met mast with

solar panel


End

11 Overview Appropriate Hardware 01

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