WeChat_20211223084351

WeChat_20211223084351

3 year ago

135 0

Jinan Xinyuhua Energy Technology Co.,Ltd

 4 year year

Product details

1、 Functional characteristics of variable pitch wind turbine

1.1 Technical advantages of variable pitch

At present, the pitch control mechanism of wind turbine is basically divided into electric control pitch control and centrifugal force pitch control.

The electronically controlled pitch mode is passive pitch, with a controller system to detect the voltage and current of the generator, and motor, hydraulic, push rod and other equipment to achieve the purpose of blade pitch. The design of the pitch mechanism is complex, so the cost is relatively high. Due to the complexity of mechanical design, the failure rate is also high in the process of operation.

Centrifugal force pitch is to install an iron flying rod at the root of the blade and use the centrifugal force generated by the impeller speed to change the blade angle. This structure is pure mechanical action pitch. Centrifugal force pitch can only be used for high-speed wind turbines. Generally, low-speed wind turbines are not conducive to the system. Moreover, centrifugal force pitch is a reverse propeller pitch mode, and the variation angle is very small.

Our company excludes the above two pitch structures and adopts the generator power pitch technology: it is the best choice for the wind turbine pitch system at present. The pitch system uses the power value of the generator to change the blade angle. During the operation of the impeller, if the generator reaches the rated power, the pitch system is affected by the power of the generator, It can linearly change the propeller angle in real time to stabilize the generator output power within the rated range. The variable pitch mechanical structure and control are simple and reasonable. Therefore, the adoption of our original variable pitch technology will greatly reduce the equipment failure rate.

1.2 safety protection of variable pitch on unit operation

The safety protection of wind turbine generator is not good. When it comes to strong wind, the impeller will rotate faster and faster, which will eventually lead to the burning of the generator. Once the generator is burned, the impeller will stop rotating. Our company has independently developed and launched variable pitch wind turbine generator system, which has been operating safely in the market for many years and operates well without burning accident. At the rated speed of the wind turbine, once the rated speed is exceeded during operation, the pitch will passively force the fan blade to pitch (pitch along the propeller mode) and adjust the speed, so as to achieve stable output power of the generator. At present, our company has launched a series of horizontal axis variable pitch wind turbines: 5kW, 15kw, 10kW, 20kW, 30kW, 50KW, 60kW and so on. Among them, 5kW two are upwind rudders with tail. Rudder specification: no leeward.

1.3 Features:

1. It adopts direct drive permanent magnet generator, high-efficiency rare earth material, and the shell is made of carbon steel.

2. The wind turbine has simple structure, the hub adopts mature variable pitch structure, no complex moving mechanical devices, and the failure rate is very low.

3. Six high-end transmission slip rings are used to conduct electricity without cable twisting.

4. The rotary vertical shaft has no rigid driving mechanism and only uses conventional bearings. This structure can easily eliminate the jitter and vibration caused by unstable air flow, which is conducive to improving the service life of wind turbine generator.

5. The efficiency of generator is more than 90%, and the utilization coefficient of wind energy is 42%.

6. Unique simple control mode, automatic windward, effectively improving the working efficiency of wind turbine; Make full use of the power of the permanent magnet generator and its own torque to control the blade pitch, so as to achieve the best state of power generation, and the annual power generation is increased by more than 30%.

7. With automatic electromagnetic unloading function.

8. The unique sealing structure is adopted to completely prevent moisture and dust.

50KW wind generator Power curve

power curve

2.1 50KW wind turbine system main Spec.

2.1.1 wind generator

Model	XYH-50KW
Rated power	50KW
Max.power	53KW
Diameter of wind turbine	16米
Blade material	Reinforced FRP
Rated speed	75r/min
Starting wind speed	3(m/s)
Rated wind speed	11(m/s)
work speed	4-25m/s
Safe wind speed	50m/s
Motor type	Direct drive permanent magnet generator 3-phase AC PM
output voltage	DC220v-380 optional
Insulation grade	B
Ambient temperature	-25℃ - 55℃
Overspeed protection	Magnetoresistive variable pitch and electromagnetic braking protection
Tower type	Independent tower
Tower height	18m optional
Noise level	<70dB
IP protection	IP54
surface treatment	Galvanized, surface paint
Controller Inverter	Isolation Type. Pure Sine wave

2.1.2 Wind On grid Inverter

Performance characteristics

(1) Main circuit is using U.S. TI' DSP chip、Infineon IGBT modules、Infineon‘driver protection, grid-connected output part adopts isolation transformer, safe and reliable ;

(2) Using SPWM pulse width modulation，pure sine wave output，automatically synchronized with the grid tracking，power factor close to 1.Low current harmonic content , pollution-free and non-shock to grid;

(3) DC maximum power tracking technique (MPPT);

(4) grid-connected inverters’ current closed loop control，control and regulate；

(5) Dc voltage across a wide range of input，adapt to different circumstances demand；

(6) Frequency disturbance the technical，to achieve control of anti-island;

(7) A comprehensive power to protect and improve yourself and protect the function。In case of system failure to stop the grid-connected invert ion ;

(8) Circuit frame compact, ax. Efficiency≥94%;

(9) Protection class up to IP20 ;

(10) Optional RS 485 communication，Upper machine monitoring， achieve the remote data collection and monitoring ;

50kw wind on grid inverter main Spec.

Technical parameters

Model	XNWG-100KS
Isolation	Low frequency transformer isolation
Maximum DC input power	120KWp
Max AC input voltage	650Vac
Input voltage range	300Vac-450Vac
AC output power	100KW
THD of AC current	<3%（Rated power）
Power factor	>0.99
Max. efficiency	95%
Euro efficiency	93%
Output rating voltage	400Vac 50HZ
AllowedGridVoltageRange	330~470Vac
AllowedGridFrequencyRange	47.5~51.5Hz
Internal power consumption an night	<10W
Automatically put into operation conditions	DC input and power to meet the requirements, the inverter automatically run
Automatic restart after power failure time	2min
Protection	Reverse polarity, short circuit, island, overheating and overload etc
Comm. interfaces	Ethernet
Operating Temp.	-25℃~+50℃
Relative humidity	0~90%，Non-condensing
Altitude(m)	000 meters (over 2000 m with derating required)
Cooling method	Forced air cooling
Noise	≤60dB
Protection degree	IP20(indoor)

2.1.3 18m wind turbine independent tower

The anti-corrosion treatment of tower adopts hot galvanizing:

Hot dip galvanizing: hot dip galvanizing, thickness: the average thickness is greater than 70 microns.

Specific process: immerse the derusted steel parts into the molten zinc at about 500 ℃, so that the zinc layer is attached to the surface of the steel members, so as to achieve the purpose of anti-corrosion. Hot dip galvanizing process flow: pickling of finished products - water washing - adding auxiliary plating solution - drying - cooling - medicating - Cleaning - grinding - completion of hot dip galvanizing.

Tower Spec.
Series	Name	Model	Note
1	Tower form	Conical 12 angle
2	Tower material	Q235
3	Height specification	Bottom section: 6M	Total height: 18m
		Middle Section：6M
		Upper section：6M
4	Caliber specification	Bottom caliber：1200mm upper caliber：600mm	Non flange diameter
5	Tower wall thickness	10mm
6	Fastening	Standard fasteners, hot dip galvanized
7	Corrosion prevention	Hot dip galvanizing
8	Net weight of tower	4500kg
9	Tower body color	Silver (Galvanized primary color)