————————————————————————————————————————————————— TEST AND MEASUREMENT INSTRUMENTS C.C. E: sales@instrumentsgroup.co.za | M:(+27) 11 683 4365 www.instrumentsgroup.c o.za RW-30kW variable pitch wind turbine 2018
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RW-30kW variable pitch wind turbine
2018
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1. RW-30kw variable pitch wind turbine parameter
1.1 RW-30kW parameter
RW-30kw variable pitch Technical parameters 13.5V
Wind rotor diameter (m) 13.5
Blade material and quantity Fiber glass reinforced * 3
Rated power / max power (w) 30k/35k
Rated wind speed (m/s) 10
Rated rotating speed (rpm) 90
Working wind speed (m/s) 3-30
Startup wind speed (m/s) 2.5
Survived wind speed (m/s) 60
Working voltage (v) DC240V(off grid) / DC400V(on
grid)AC240
Battery voltage / capcity (v, ah) 12*20=240V/200Ah
Speed regulation method Variable pitch regulation +
electromagnet brake + active yawing
Stop method Mechanical brake, aerodynamic brake
Generator type Three phase, permanent magnet
Gear box No, direct drive
Wind turbine weight (kg) 2600
Tower height / weight (m/kg) 25/4200
Max horizontal force (N) 27602
Wind turbine dimension D*L (m) 13.5*2.5
Noise level (dB) <65
Packaging info for transportation 5PKGS,7160kg, 28CBM
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2.1 RW-30kw output power curve
Wind speed (m/s) Output power (w)
2 172
3 850
4 2020
5 3956
6 6837
7 10856
8 16205
9 23050
10 31650
11 36500
12 36500
13 36500
14 36500
15 36500
16 36500
17 36500
18 36500
19 36500
>20 36500
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2.2 RW-30kw AEP
Annual wind speed (m/s) Electricity generated (kwh)
3 19554
3.5 30474
4 43584
4.5 58151
5 73418
5.5 88751
6 103684
6.5 117901
7 131195
7.5 143434
8 154540
8.5 164471
9 173212
9.5 180778
10 187199
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3. 30kW variable pitch wind turbine characteristics
3.1 30kW main parts introduction and characteristics:
No. Name No. Name
1 Blade sleeve 8 Supporting bracket
2 Nose cone 9 Main control box
3 Blade 10 Yawing motor
4 Generator 11 Supporting flange
5 Nacelle 12 Hydraulic station
6 Dogvane 13 Hydraulic brake
7 Anemometer 14 Nacelle cover
Wind turbine main configuration:
No. Main components
1 Blade
2 Variable pitch mechanism
3 Generator
4 Rotating support mechanism
5 ABS system
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6 Anemometer and dogvane
7 Yawing control and cable-release
mechanism
8 Hydraulic system and brake
3.2 Variable pitch technology
Variable pitch travel 45mm
Answer speed at rated wind speed of variable
pitch
t<2s
Startup rotating speed of first-degree variable
pitch
30±10rpm
Startup rotating speed of second-degree variable
pitch
120±10rpm
Spring of variable pitch mechanism Over 100 million time service
life
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RENERGY variable pitch wind turbine is a patented product and pioneer in China.
The self-developed variable pitch mechanism of Wind turbine adjusts blade pitch
following wind rotor rotating speed and wind speed, and keep wind turbine at rated
rotating speed. The wind turbine has a stable output power and safe running and is
maintenance free.
3.3 Blade technology
Blade specification
Item 30kW
Blade length 5.8m
Blade weight 160kg
Material Reinforced fire-glass
Quantity 3 pieces
Weather-proof
treatment
US imports 3M protection film
Blade raw
material
US Ashland colophony
Gel coat US Ashland gel coat
Bond US imports Plexus
A.
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B. Blade strength
RENERGY blade was approval by Denmark professional testing institution; No
damage with 400KG pilling force for over 3 minutes.
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C. Blade protection
Leading edge protection finishing: reduce 10% wind rotor noise, good anti-corrosion
capability, prolong service life effectively.
D. Wind rotor balance debug regulation
Every set of blades will be tested as follow before leaving the factory
(1). Static balance check after assembling blade and hub
(2). Blade face runout check after assembling blade and hub
(3). Angle check after assembling blade and hub
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(4). Single blade gravitational moment check
3.4 Generator technology
Generator technology
Item 30kW
Rated voltage DC500V
Rated/maximum output power 30/35Kw
Stator external diameter 520mm
Generator shaft diameter 120mm
Generator weight 850kg
Outline dimension 650×650×700mm
Stator iron cone material Cold-rolled silicon steel sheet
Generator shaft material 40Cr
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A. Inner rotor design with good tightness. Level of protection: IP54
B. Radial tile-shaped permanent magnet rotor magnetic circuit structure: flux density
is 10-15% higher than traditional Tangential magnetic circuit.
C. Generator fractional slot winding: generator design adopts fractional slot winding;
lower output harmonic component of generator; lower waveform distortion; lower
startup resist moment. All of these make wind turbine startup with lower wind
speed.
D. Special electromagnetic load design: not only consider of generator capacity, but
also improve generator’s overload capacity by 1.5 times.
E. Larger cooling area: generator cooling area is over 2.5 times comparing with Stator
outer circumference area. The temperature rise is always lower than 85 degree with
long time running with 1.2 times to full output power.
F. Cold-rolled non-oriented silicon steel sheet: Lower generator iron loss
G. Independent design stator piece: more reasonable generator stator cell structure.
Lower current density
H. Higher fixed voltage adjustable rate: Fixed voltage adjustable rate is over 45%.
Lower cut-in wind speed; Easy for grid-connection inverter power design.
I. High structure strength: generator case can bear some damaged working condition
such as single blade fly out. 1.5 times safety ratio
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J. Permanent magnet direct-drive structure: no gear case, low failure rate.
3.5 Rotating supporting mechanism
(1) It adopts a special rotating system which is suitable for small and medium wind
turbine. Good stable ability for yawing.
(2) It adopts yawing brake mechanism. It helps gear box to avoid tired which be
caused by wind rotor pressure. This makes yawing mechanism have a longer service
life.
3.6 ABS system
3.6.1 Variable pitch brake system component
(1) Variable pitch wind rotor
(2) Brake mechanism
(3) Auto brake PLC controller
(4) Hydraulic system
(1) Variable pitch wind rotor
In brake system, variable pitch wind rotor change blade angle into negative angle,
remove wind pressure on wind rotor, and slow down wind rotor rotating speed, wind
rotor lose power.
Wind rotor
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Blade angle change direction
(2) Brake mechanism
After wind rotor lose power and slow down, brake mechanism will brake wind rotor
axis with disc brake, wind rotor stop rotating.
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(3) Auto brake PLC controller
Auto brake PLC controller detects wind speed, voltage, current, grid power state and
other signals, and control wind turbine brake or running.
PLC Controller
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3.6.2 Brake principle
Auto brake principle
(1) Over wind speed brake:
PLC controller detect wind speed, when wind speed is over 18m/s, PLC controller
send brake signal, brake relay close, brake mechanism start brake. When PLC
controller detects in position signal, stop braking.
(2) Over voltage brake:
PLC controller detects wind turbine controller voltage signal, when voltage is over
560VDC, PLC controller send brake signal, and brake mechanism start brake. When
PLC controller detects in position signal, stop braking.
(3) Over current brake:
PLC controller detects wind turbine output current signal, when current is over 45A,
PLC controller send brake signal, brake mechanism start brake. When PLC controller
detects in position signal, stop braking.
(4) Grid power failure brake:
PLC controller detects grid power signal, when there is a grid power failure, PLC
controller will send brake signal, brake wind turbine and send alarm signal.
(5) Brake release
After PLC controller finish brake, it will continue detect average wind speed in
45minutes, if wind speed is less than 12m/s, PLC will send brake release signal,
brake mechanism start to release brake. When PLC controller detect in position
signal, stop brake releasing.
3.6.3 Variable pitch brake process
(Take over wind speed as example to explain variable pitch brake process)
(1) Anemometer detects wind speed signal, and send wind speed signal to Auto
brake PLC controller,
(2) Auto brake PLC controller receives wind speed signal, and send brake signal out,
(3) Auto winch receive brake signal and start,
(4) Wind rotor blade angle change into negative angle by auto winch, wind rotor lose
power, rotating speed slow down,
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(5) Brake mechanism start, brake wind turbine
3.7 Anemometer and dogvane
Dogvane
Dogvane detects the real wind direction. When the PLC controller detects that the
wind turbine is diverged with main wind direction about ≥15° in continuous 2 minutes,
the control center will start up lift-yawing or right yawing to find the right wind direction.
When is test that the wind turbine faces to right wind direction, it stops yawing.
Anemometer
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3.8 Yawing control and cable-release function
3.8.1 Yawing brake
(1)When the PLC control center tests the immediately wind speed comes up to
25m/s, it will send yawing order to make wind turbine avoid wind direction about 90
degrees.
When PLC control center tests that variable pitch brake is failure, it will send order
to make wind turbine diverge wind direction about 90 degrees. This ensures wind
turbine safety.
3.8.2 Yawing cable-release
When the wind turbine runs for a long time, the cable may be twine because of the
long working time and wind direction changeable. When the yawing cable-release
inspection mechanism tests that wind turbine rotates 2 circumferences which is
calculative in one wind direction, it will rotate in negative direction.
Rotating mechanism
Numeration coder
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4. RW- 30kW features
4.1 Intelligent control
The main control center of 20kW / 30kW variable pitch wind turbine is an innovated
intelligent electrical system, admitting the best wind turbine control technology and
combing variable pitch wind turbine characteristics. The hardware was chose by the
best international supplier, running stable, strong anti-interference ability. The
software adopts redundancy control strategy to ensure system running safe and
reliable. System has strong extendibility; it can match with all kinds of famous brand
inverter and remote monitor module. It meet client's requirement of one-stop service.
4.1.1 Intelligent protection
15 redundancy safety protection measurements: Yawing brake protection for power
failure, such as over voltage, over current, over rotating speed, over temperature, low
pressure and so on; sensor failure protection for voltage, current, rotating speed, wind
speed, wind direction; system failure emergency brake protection for yawing and
variable pitch failure; protection for "inverter is out of net"; stop at over wind speed;
restart function as low wind speed and so on. All of these measurements ensure wind
turbine running safety and reliable.
4.1.2 Remote monitor
User can monitor the wind turbine system by internet or mobile net at real time. User
can learn wind turbine running station at first time.
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4.1.3 Active yawing
Find wind direction automatic
The dogvane can inspect wind direction at real time then ensure wind turbine finding
right wind direction intelligent. Finding wind intelligent strategy not only ensures the
output power, but also avoids yawing parts abrades because of finding wind direction
frequency.
4.1.4 Automatic untwisting
Double cable untwisting protection, ensures wind turbine's cable untwisting forever.
4.2 Leading STEP variable pitch technology world-wide
4.2.1 Leading technology
4.2.1.1 Exactly and softness regulation of variable pitch
Information input source of variable pitch is the wind rotor rotating speed, it make sure
the response quick and regulate softness
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4.2.1.2 Long service life design
System adopts mechanical part, floating connection, full range of lubrication
protection. Less system malfunctions and better environmental suitability.
4.2.2 Generate 30% electricity more than normal wind turbine
4.2.2.1 Lower start up wind speed
Double degree variable pitch mechanism ensures blade have an optimum startup
degree. Wind rotor can be started with 2m/s wind speed.
4.2.2.2 Stable running when wind speed is higher than rated wind speed
The blade angle is minus value under variable pitch when wind speed is over than
rated wind speed. It makes system have a stable rated output power.
4.3 Fail Safe design
In extremely conditions, if all protection failed, Unique Fail safe design of Renergy will
work, wind turbine blade will become feathering, wind turbine stop. The last fail safe
design will keep wind turbine safe in any cases.
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