RW-30kW variable pitch wind turbine

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Nancy Beasley
5 years ago
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1 RW-30kW variable pitch wind turbine o.za

2 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) Battery voltage / capcity (v, ah) Speed regulation method Stop method DC240V(off grid) / DC400V(on grid)ac240 12*20=240V/200Ah Variable pitch regulation + electromagnet brake + active yawing Mechanical brake, aerodynamic brake Generator type Gear box Three phase, permanent magnet No, direct drive Wind turbine weight (kg) 2600 Tower height / weight (m/kg) 25/4200 Max horizontal force (N) Wind turbine dimension D*L (m) 13.5*2.5 Noise level (db) <65 Packaging info for transportation 5PKGS,7160kg, 28CBM

3 2.1 RW-30kw output power curve Wind speed (m/s) Output power (w) >

2.2 RW-30kw AEP Annual wind speed (m/s) Electricity generated (kwh) 3 19554 3.5 30474 4 43584 4.

4 2.2 RW-30kw AEP Annual wind speed (m/s) Electricity generated (kwh)

3. 30kW variable pitch wind turbine characteristics 3.1 30kW main parts introduction and characteristics: No. Name No.

5 3. 30kW variable pitch wind turbine characteristics kW 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

6 6 Anemometer and dogvane 7 Yawing control and cable-release mechanism 8 Hydraulic system and brake 3.2 Variable pitch technology Variable pitch travel Answer speed at rated wind speed of variable pitch Startup rotating speed of first-degree variable pitch Startup rotating speed of second-degree variable pitch Spring of variable pitch mechanism 45mm t<2s 30±10rpm 120±10rpm Over 100 million time service life

7 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 US imports 3M protection film treatment Blade raw US Ashland colophony material Gel coat US Ashland gel coat Bond US imports Plexus A.

8 B. Blade strength RENERGY blade was approval by Denmark professional testing institution; No damage with 400KG pilling force for over 3 minutes.

C. Blade protection Leading edge protection finishing: reduce 10% wind

as follow before leaving the factory (1).

9 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

Stator external diameter Generator shaft diameter Generator weight Outline dimension

10 (4). Single blade gravitational moment check 3.4 Generator technology Generator technology Item Rated voltage Rated/maximum output power Stator external diameter Generator shaft diameter Generator weight Outline dimension Stator iron cone material Generator shaft material 30kW DC500V 30/35Kw 520mm 120mm 850kg mm Cold-rolled silicon steel sheet 40Cr

A. Inner rotor design with good tightness. Level of protection: IP54 B.

$Generator fractional slot winding: generator design adopts fractional slot winding; lower output harmonic component of generator; lower waveform distortion; lower startup resist moment.$ 5 times. E. Larger cooling area: generator cooling area is over 2.5 times comparing with Stator outer circumference area.

5 times. E. Larger cooling area: generator cooling area is over 2.5 times comparing with Stator outer circumference area.

11 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

12 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 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

13 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.

14 (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

15 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 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,

16 (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

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.

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.

17 3.8 Yawing control and cable-release function 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 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

18 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 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 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.

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.

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.

19 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 Automatic untwisting Double cable untwisting protection, ensures wind turbine's cable untwisting forever. 4.2 Leading STEP variable pitch technology world-wide Leading technology 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

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.

20 Long service life design System adopts mechanical part, floating connection, full range of lubrication protection. Less system malfunctions and better environmental suitability Generate 30% electricity more than normal wind turbine 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 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.

AH-5kW pitch controlled wind turbine on grid system

AH-5kW pitch controlled wind turbine on grid system 2013/1/5 1. Company introduction...3 2. System configuration analysis...4 3. System technical parameter...5 3.1. Wind turbine...5 3.1.1 blade...8 3.1.2