Need to know the relationship formula between the rated power of the wind turbine and the rated wind

Introduction You need to know the formula for the relationship between the rated power of the wind turbine and the rated wind speed. The rated power of the wind turbine: Assume the wind speed v the air density ρ and the radius of the generator blade R striking the fan

Need to know the relationship formula between the rated power of the wind turbine and the rated wind

Rated power of wind turbine: assume wind speed v air density ρ generator blade radius R air mass hitting fan blade within time t m = ρπR^2Vt, the energy obtained by the fan blade E = 1/2mv^2 =1/ 2ρπR^2V^3t

P0=E/t=1/2ρπR^2V^3

Assume generator efficiency η

Wind turbine Electricity generation power P=1/2ηρπR^2V^3

What is the formula to calculate wind energy ?

The largest is 5 MW, available in Denmark and one in China. . Generally, 2 MW, 1.5 MW or less 0.8 MW are used in China.

Formula for calculating electrical power: P=W/t =UI.

In a purely resistive circuit, according to Ohm's law U=IR and substituted by P=UI, we can also obtain: P=I2R=(U2)/R.

In dynamics: Power calculation formula: P=W/t (average power); P=Fvcosα (instantaneous power).

Detailed information

Whenf the wind turbine produces electricity, it must ensure that the output frequency is constant. This is very necessary for both grid-connected wind power generation and wind-solar hybrid power generation. ?

To ensure that the frequency of wind power is constant, one solution is to ensure a constant speed of the generator, that is, a constant speed and constant frequency operating mode , because the generator is driven by the generator. wind turbine through the transmission device, this method undoubtedly requires a constant speed of the wind turbine, which will affect the wind energy conversion efficiency.

Another way is to change the speed of the generator according to the wind speed and ensure that the frequency of the output electrical energy is constant by other means, i.e. i.e. constant frequency and variable speed operation. Lhe wind energy utilization coefficient of the wind turbine is related to the blade tip speed ratio (the ratio between the linear speed of the turbine tip and the wind speed). There is a certain blade tip speed ratio that causes Cp to reach the maximum value.

Baidu Encyclopedia - Wind Turbine

What data is needed to calculate the voltage of wind power generation and how to calculate it?

The formula above is the famous "wind energy formula":

E=1/2 (ρtsυ3)

In the formula: ρ!——Air density (kg/m2);

υ——wind speed (m/s);

t——time (seconds);

S—— ——Cross-sectional area (m2).

This is a formula often used in the use of wind energy. It can be seen from the wind energy formula that wind energy is mainly related to three factors: wind speed, area through which the wind passes, and air density.The relationship is as follows: (1) The size of wind energy (E) and the cube of wind speed (υ3) is proportional to. In other words, the main factor affecting wind power is wind speed.

(2) The magnitude of wind energy (E) is proportional to the area(s) crossed by the wind. For wind turbines, it is wind energy proportional to the swept area of ​​the wind turbine rotor as it rotates. Since the diameter of the wind turbine is generally used as the main parameter of the wind turbine, the size of wind power is proportional to the square of the diameter of the wind turbine.

(2) The magnitude of wind energy (E) is proportional to the density of air (ρ). Air density refers to the mass (in kilograms) of air contained per unit volume (m3). Therefore, when calculating wind energy, it is necessary to know the value of air density ρ. The value ρ of the density of the air is related to air humidity, temperature and altitude and can be found from relevant information.

Large wind turbines

First of all, your question is too general.

The wind energy that the wind turbine can absorb P=1/2 (CpρπR^2U^3). In simple terms, the wind energy absorbed by the wind turbine is proportional to the cube of the wind speed, where Cp is the wind energy utilization coefficient. And this is only the theoretical power absorbed by the wind wheel. If it reaches the generator through the transmission system, there will be a loss.

As for the actual voltage, current and power output by the generator you asked about, they are determined based on the working conditions and power characteristics of the engine. For example, for some medium-sized machines, the voltage is. 670 V at rated wind speed. The power is 750 kW. Most generatThey have a nominal voltage of between several thousand and tens of thousands of volts. After its output, it must be amplified by the transformer station and filtered to remove harmonics before being supplied to the Internet.

I hope this can help you

If you are a beginner, I suggest you buy two books,

"Wind Engineering and Industrial Aerodynamics" by He Dexin.

"Wind Energy Technology" written by Tony Burton and translated by Wu Xin and others

The question you added is that the custom is between 10 m/s and 20 m/s, and the electricity is produced between 20 and 30V Of course there is absolutely no problem.

As for the cost, it cannot be determined immediately. If you already have a good usage address, i.e. a wind farm, it will not cost you much to produce such a small amount of electricity. can use a small vertical axis wind turbine is placed on the toit and can be directly driven. The main cost is the engine, and everything else is cheap. You complete the overall design plan, then request a price from the parts supplier. There's no need for a tower or large-scale lift, and it doesn't cost a lot of money.

By the way, sending this little call, haha, it's not worth it, personal opinion. I wish you good work

3000 seems a bit high. The key is that it is your own new idea. This is not a mass-produced product and the labor cost is very high.

Parts like small motors + gears + wires + bearings are relatively easy to tell, but your blades, steering gears, brake pads, etc. are relatively easy to tell. must be specially made unless you are a carpenter or lathe, otherwise. 3000 should be If you can't download it, you should save space, add a little budget,try to save as much as possible, maybe it will work, because your machine is small and the technical requirements are not very high.

How about searching for a complete set supplier directly? There are manufacturers of complete sets of small wind turbines, some of which cost more than 2,000 yuan.

The largest is 5 MW in Denmark and one in China. Generally, 2 MW, 1.5 MW or less 0.8 MW are used in China.

The common models currently used in wind farms are all 1.5 MW units, that is, the full power of the wind turbine is 1,500 kW. This 1500 is the power output. It is not necessary to calculate the power factor. But now wind turbines all have some breeder generation capabilities, and some models can even generate up to 1,700 KW. However, given the particularity of wind farms;

The power changes quickly independing on changes in the wind, therefore. full power is not often the case. Current wind farm planning generally calculates that a phase does not exceed 50 MW, so a single 1.5 MW wind turbine with 33 units has a total power of 49.5 MW.

Detailed information:

Electric power calculation formula: P=W/ t =UI;

In a purely resistive circuit, according to Ohm's law U=IR replaces P=UI and we can also obtain: P=I2R=(U2)/R

In dynamic: power Calculation formula: 1.P=W/t (average power) 2.P=FV; P=Fvcosα (instantaneous power)

Because W=F (force F) × S (displacement s) (work (definition formula), so the power formula can also be derived as P= F v:

P=W /t=F*S/t=F*V (this formula is suitable for objects moving in a straight line at a uniform speed)

P in the formula represents power, the unit is "Watt", callée "Watt", and the symbol is W.

W represents work. The unit is "joule", called "joule", and the symbol is J.

t represents time, the unit is "second" and the symbol is "s".

Baidu-Power Encyclopedia

  • Popular Focus
  • Where is the cheapest battery wholesale?

    Where is the cheapest battery wholesale in Tangxia, Sanyuanli, Baiyun District? There is an enterprise specializing in the independent production of electric vehicles in Tangxia, Sanyuanli, Baiyun District, Baiyun Sanyuanli Avenue, Baiyun Sanyuanli Street
    08-02
  • Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. How to reduce it to 4.8V/4.4A?

    Four 3.7V lithium batteries in series and parallel produce 7.4V/4.4A. I personally think it is impossible to reduce it to 4.8V/4.4A. Because the discharge platform of lithium batteries is generally set
    08-10
  • What are the materials of the negative electrodes of lithium batteries?

    What are the materials of the negative electrodes of lithium batteries? The main commercial applications of lithium batteries include graphite, which is a sheet of copper used to guide current and which does not react. another safe
    08-02
  • The difference between 18500 and 26500 batteries

    What is the difference between 18500 and 26500 batteries? The answer above is 18650. The person asking the question should ask what is the difference between 18505 and 26500 batteries. In the case of Fuant ER1
    08-02
  • What does 3.7V 80mAh written on a lithium battery mean?

    What does 3.7V 80mAh written on a lithium battery mean? 3.7 V, 80 mA = 0.08 A, H means 1 hour, or 3600 seconds. Taken together, it is
    08-02
  • How long does a lithium battery (cell phone battery) last?

    How long does a lithium battery (cell phone battery) last? The lifespan of mobile phone batteries, under normal conditions of use and without serious impact, the lifespan set by the manufacturer must be 5 years.
    08-02
  • Will lithium batteries explode when charging?

    Will lithium batteries explode when charged? Will lithium batteries explode when charged? Lithium battery explosions usually occur during the charging process, because the negative electrode material of lithium batteries is graphite or other carbon materi
    08-02
  • Parameters of lgdas31865 lithium battery

    Parameters of lgdas31865 lithium battery The parameters of lgdas31865 lithium battery are as follows: LGDAS31865 is a model 18650 lithium battery with a capacity of
    08-02
  • What are the main components of lithium battery electrolyte?

    What are the main components of lithium battery electrolyte? The composition of lithium battery electrolyte is shown below. 1. Ethylene carbonate: molecular formula C3H4O3. Colorless transparent liquid (>35℃), room temperature
    08-02
  • Who are the lithium battery manufacturers in Shandong?

    What are the lithium battery manufacturers in Shandong? Shandong Shengyang Power Supply Co., Ltd. and Shandong Weineng Environmental Protection Power Technology Co., Ltd. 1. Shandong Shengyang Power Supply Co., Ltd. is located in Shengyang, Qufu City.
    08-02
  • Types of drone batteries available in 2024

    Part 1. Types of drone batteries available in 2024In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in
    07-30
  • How long does it take to charge 26650 battery?

    How long does it take to charge a 26650 battery? The charging time for a 26650 battery is generally between 3 and 6 hours, but the precise time depends on the power of the charger and the capacity of the battery. in general
    08-02
  • For what?Sure, here's an article based on the phrase "For what?

    The simple yet profound question, "For what?" often serves as a gateway to deeper reflections on purpose and intention. It is a query that invites us to delve into the reasons behind actions, decisions, and circumstances that shape our lives and the wor
    08-02
  • Choosing the Right Cart Battery

    This comprehensive guide will walk you through everything you need about cart batteries, from understanding different types to making an informed purchase decision.
    08-02
  • 30mAh~500mAh 3.7 V Li-ion Battery

    Welcome to Ufine's collection of 3.7V lithium-ion batteries ranging from 30mAh to 500mAh. Explore a diverse range of compact and lightweight batteries suitable for various electronic devices,
    08-02
  • Here are 10 essential facts about drone batteries for 2024.

    10 Key Facts About Drone Battery for 2024 In 2024, drone batteries have advanced significantly, offering a range of options to cater to various needs in the consumer, commercial, and industrial sectors. Below are the primary types of drone batteries avai
    08-02
  • Could you please explain the difference among IMR, ICR, INR, and IFR 18650 batteries?

    What is the Difference Between IMR, ICR, INR, and IFR 18650 Battery?In 18650 batteries, discerning the differences among IMR, ICR, INR, and IFR types is fundamental for tailored and efficient battery usage. These distinct
    08-02
  • Safety considerations for cart batteries

    Selecting the ideal cart battery is crucial for ensuring optimal performance and longevity of your electric vehicle or vaping device. This comprehensive guide w
    08-01