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# Wind Turbines - Science topic

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Questions related to Wind Turbines

It would make my essay easier to find information about this airfoil.

Thank you anyway!

#naca #aviation #engineering #airfoils #pilots #2430 #information #wind turbine #CFD

Hello all

I am working on small offshore 3 straight blade vertical axis wind turbine with 6 degree of motion. Could anyone please let me know which NACA airfoil is best suitable ?

Thanks

Why don't physicists promote the mixture of solar panels that work maximally half of the day and wind turbines that spoil the horizon and collapse after thirty years in a dangerous and difficult-to-repair way by sun-meadows full of a mixture of solar panels and wind turbines that are not higher than a few meters, work twenty-four hours, do not collapse dangerously and can easily be repaired or replaced? These meadows do not spoil the horizon and can provide human communities with sufficient energy to live without worsening the climate. Even individual houses or complete streets can mix their solar panels with short wind turbines that can deliver several kilowatts per sunny or windy hour. Take a look at windy.com.

I am working on a small wind turbine as part of my internship for my course. The rated capacity of the small wind turbine is 700 watts at a rated wind speed of (…) m/s. The turbine is installed on a (height of the pole) m- steel pole/ tower. Further, the turbine is connected to the local electricity grid.

Challenges faced: At 3 m/s- windspeed, I am observing that the connected sensors/ electronics are consuming 15W

I am looking to design and further running simulations and analyse a low speed shaft of a typical wind turbine. What should be the optimal shaft diameter and length for a given torque and rotational speed requirement in a transmission system of a wind turbine. Do you recommend any good software to run FEA simulations for validation analysis purposes.

Any suggestion, I will much appreciate.

I am looking to design and further running simulations and analyse a low speed shaft of a typical wind turbine. In particular I am looking to design the shaft diameter and length and any other connection components such bearings, keys and so on, for a given torque and rotational speed requirement in a transmission system of a wind turbine. Do you recommend any good software to run FEA simulations for validation analysis purposes.

Any suggestions or comments, I will much appreciate.

I am looking to design and further running simulations and analyse a low speed shaft of a typical wind turbine. In particular I am looking to design the shaft diameter and length and any other connection components such bearings, keys and so on, for a given torque and rotational speed requirement in a transmission system of a wind turbine. Do you recommend any good software to run FEA simulations for validation analysis purposes.

Any suggestions or comments, I will much appreciate.

I am investigating the open jets of small wind tunnels and the study of small scale wind turbines and need to know how to calculate the distance "x" where the jet flow manages to flood the machine.

Why don't physicists promote the mixture of solar panels that work maximally half of the day and wind turbines that spoil the horizon and collapse after thirty years in a dangerous and difficult-to-repair way by sun-meadows full of a mixture of solar panels and wind turbines that are not higher than a few meters, work twenty-four hours, do not collapse dangerously and can easily be repaired or replaced? These meadows do not spoil the horizon and can provide human communities with sufficient energy to live without worsening the climate. Even individual houses or complete streets can mix their solar panels with short wind turbines that can deliver several kilowatts per sunny or windy hour. Take a look at windy.com.

Is there any comprehensive review on types of vertical wind turbines?

What are the laws, regulations, zoning guidelines, etc., for preventing negative impacts of noise coming from infrastructure, especially renewable energy? Some countries have more lax environmental regulations for renewable energy, others are missing any reference to this issue because these technologies are relatively new or perceived as relatively harmless (in comparison to non-renewable energy).

I have written a review on Wind Turbine Noise effects on wildlife and the planning regulations and guidelines (and lack thereof) in Germany, California, and Israel, and looking for additional cases and countries, including photovoltaic energy impacts.

Attaching the article if it helps some of you who are interested in the field (open access). The title is: "Noise pollution from wind turbines and its effects on wildlife: A cross-national analysis of current policies and planning regulations".

**In MATLAB simulation model of DFIG grid tied system, why after starting the DFIG, the torque produced by the wind turbine DFIG increases and the rotor speed decreases and why it is not coming under steady state? What is this phenomena called?**

Hello Researchers,

I want to design controller for PMSG Wind turbine that works satisfactorily while operating in High Speed region, probably more than 20m/s wind speed. Kindly suggest me controller, I should use to give good performance?

Thanks in Advance

I made this hybrid power plant simulation with HOMER where I assumed the solar power plant system doesn't have enough irradiation so it can't produce any power and it's just the wind power plant system that worked. It turned out that the result is the consumption power (AC Primary Load) is bigger than the power generated by the wind turbine. Is it okay? How do I solve this problem?

I want to perform fatigue analysis of a wind turbine blade and I want to model a real wind turbine. Are there any related materials that can help with detail modeling?

How to obtain the dynamic equation of the power system consisting of synchronous generator, a step up transformer, a series compensated transmission line and a wind turbine DFIG, in which the synchronous generator acts as a source delivering real power, and wind turbine DFIG acts as a load consuming real power ?

I came with the following explanation, but I am not sure if it is correct. The variation of the thrust coefficient is directly related to the variation of the thrust force. According to the Newton’s second law, the aerodynamic forces are associated with the change in momentum of the fluid with time. This is equivalent to the mass times the velocity of the fluid. Then, the density depends on the mass airflow, that means a higher value of air density contains additional mass, which lead to a greater thrust force

So imagine modelling a viable design of a fixed-speed wind energy conversion system (WECS) for remotely located geographical areas without grid connection using Simulink. The 3-phase WECS should consist of a wound-rotor diesel synchronous generator, a wind turbine induction generator with shunt reactive power compensation, and 3-phase customer loads to be supplied at constant voltage and frequency over the entire wind speed range of [5,12] m/s. The power system to be designed should be initially operated in steady state supplying the main 50 kW load only, with an additional 50 kW load being subsequently switched on by closing the circuit breaker. so we are to analyse the system transient response to this step load change by computer simulations making the relevant conclusions/observations from the results obtained.

I'm currently working on my project which is 'Aerodynamic Analysis and design of airfoils for wind turbines. I'd really appreciate if anyone could help me with finding new airfoils.

Is there a law or method that determines the division of the outer domain surrounding the rotating domain of wind turbines into multi sections in Ansys, as well as choosing the position of the rotating domain inside it as shown in the pictures

Do we need man-made wind turbines everywhere? Can’t we utilize nature-made trees to harvest wind energy?

Hello. Does anyone know why the torque of bipale wind turbine optimized with the gradient method doesn't start from zero. Thank you for your answers.

Hello, I have a real problem statement from wind industry. Does, anyone suggest the solution.

We have power converters for 2-3MW wind turbine and their failures are a cause of concern, I know there is peak wind season is going on which may be the one of the reason of failures.

Can anyone suggest the other causes of failures and possible solutions? Please share if any case study available in public domain.

I am micro-siting wind turbines in WAsP.

I need to optimize the layout obtained after micro-siting using open-source optimization software.

Hi there,

any independent research available regarding the storage of energy in a very efficient battery for retail solar panels vs home wind turbines? Cherish your feedback.

hello all,

I am currently working on studying the effect of integrating wind energy on the IEEE 9 BUS using Matlab Simulink, the curve of voltage and frequency in the buss gave satisfactory results without wind, but after integrating the wind turbine, the voltage and the frequency diverged from the default value.

so I wanted to as if there is someone here that simulated similar work and can help me to clarify some questions.

- Any recommendations for optimal integration of wind energy into the grid? ( with Simulink Matlab ) , references?

Thank you.

Who has a simulation model of a wind turbine based on a dual-fed asynchronous generator for high power?

**Who has a simulation model of a wind turbine based on a dual-fed asynchronous generator for high power that takes into account grid-side power converter control and generator-side power converter control?**

my turbine is a variable speed wind turbine.

Hello everyone, I am working on the aerodynamics of blades of a Horizontal axis wind turbine .I want to know how to pick the best airfoils along the blade studied . for example if I have a 100 kw wind turbine and i would like to mixt 4 different airfoils in my blade , how do i know the type of those airfoils , and thier orde along the blade ?

**Why Are Wind Turbines Built In Rural Locations Instead Of In Cities Where The Energy Is Used?**

Dear contacts , can you recommend any references or papers in topic related to structural analysis of floating offshore wind turbine .

I did a calculation of the output power of VAWT with the following equation:

[Available output power]=([density of air]*[Swept area of blades]*[wind speed]^3)/2

[Real output power]=[Available output power]*[wind turbine efficiency]

I achieved some values, but I am not sure if it is the right way to calculate the output power.

According to VAWTs on market such as Makemu EOLO 3000, the output power is achieving 2kW at 8m/s which is 10 times bigger than my calculation, on the other hand, the output of EOLO 3000 was achieving more than the [Available output power]. Is there any other way to calculate the output power of VAWT?

Hi ,

I have transient CFD of a rotating Vertical Axis Wind Turbine. The torque changes with the rotation angle theta, I wish to obtain a plot of torque against azimuth angle as attached below and other properties as well. I am currently unsure how to do this as I can only do a standard XY plot on Ansys.

Hi guys, I am simulating a horizontal axis small scale wind turbine using Ansys Fluent. In order to validate the manufacturing data, I vary the wind speed and its corresponded angular velocity, but unfortunately the obtained results exceeds the experimental ones especially in high wind speeds (15m/s). According to the wind turbine manufacturer the turbine have a pitch control system, but there is no information about the used pitch angle in the experimental results. What must I do in this case? Can I choose the pitch angle that gives the same results as experimental ones ?

Thank you.

Hi,

I have been looking at the La Haute Borne wind farm data for my research. The data descriptions are given here:

As a CFD guy, I'm not well-informed about the wind turbine controls and nomenclature, and I was not able to find a reference manual for the said turbine (Senvion MM82) yet. Hence any help with the following questions will be well appreciated:

1. Is there a global standard for direction readings? For instance, are parameters like "Absolute_wind_direction" and "Nacelle_angle" measured zero for north (true or magnetic?), or east, or a pre-defined direction? This page (https://www.eol.ucar.edu/content/wind-direction-quick-reference) defines CW as positive (north:0deg, east:90deg ...), should I assume this for the said turbine?

2. Let us assume 0 means north, this means that 0 indicates a northerly (blowing from north to south) wind, right?

3. What does "corrected" indicate for these parameters exactly in that regard?

Some of the questions might sound silly :) But I don't know if those definitions are standard for all turbines, so I thought that referring to another turbine's descriptions or making assumptions might have misled me.

Thanks in advance,

Hüseyin

I want to do some research on Flex5. What's the difference between FAST and Flex5 code? I want to do some simulation about individual pitch control. Which one is better for me? If you know the link for downloading the Flex5 code, can you tell me? I am really appreciate. Thank you!

I really need real data of voltage output for completing my research. I would be really appreciate if someone can help me.

Hi guys, I investigate an aerodynamic study of an HAWT using Ansys Fluent. After solution convergence I need to calculate the loads on the blade turbine using CFD-post. How can I do this? Thank you.

Dear experts,

I am elaborating on the impact of flicker shading from wind turbines on solar inverters.

Racing shadows from wind turbine blade shadows across a solar field impact the current flow at the DC terminals of an inverter. Depending on configuration - just few or multiple strings per MPP tracker - the inverter would want to follow that fluctuating signal.

- What is the follow rate of MPP trackers and conversion electronics on such steep change ramps?
- What is the impact on the inverter life time?
- What is the recommended design?

(Note: the question is NOT about the impact on the plant performance due to shading losses.)

Many thanks for hints or papers.

Best regards

Ralf

I am trying to use cfd to get an output for the power of a vertical axis wind turbine. I have done lots of research but am still unsure about what parameters to use/ measure in the CFD solver calculations and what equations to put them into. Ie how to I get pressure co efficnt from cfd at various angles to azimuth angles and plot them into a graph and equation to find power output?

Thank you

The WES consists of wind turbines, a boost converter, a diode rectifier, Permanent Magnet Synchronous Generator (PMSG), and an MPPT controller. having characteristics of

Stator resistance

0.048 ohms

Armature inductance

0.00016 H

Link flow

0.048 V. s

Inertia

0.000002

How to find number of poles?

Formula?

Mathematical model?

For example, WTG having 2.5 MW and the current (Ipeak) is 2200 A @690 V, 300 sq.mm CU 475 A UG.

I would like to know for design of sizing of conduits.

Which type of turbine is better on a moving vehicle

Darrieus or Savonius?

I am working on a grid-connected wind turbine based on a PMSG, the referenced active power is adjusted to be 80% of the maximum available power to have a power reserve for the frequency support. The frequency error and its derivative are used to generate the increment/decrement in the active power reference during frequency disturbances (PLL is used to extract the grid frequency). To simulate the frequency disturbance, the programmable voltage source block in SIMULINK has been used to have a step decrease in the frequency of about 1 Hz. However, when comparing the frequency waveform with and without the frequency droop control it looks exactly the same. Different gains are attempted for the frequency droop are attempted but the output is the same. Any suggestion what might be the problem?

Hi everyone, I simulate a three bladed wind turbine using Ansys Fluent. The variation of wind turbine torque with tip speed ratio must have a peak. But in my case, as tip speed ratio increases , torque also increases.

How can I solve this problem ?

Hi guys, I am simulating an horizontal axis wind turbine using Ansys Fluent (steady state simulation). To get more accurate results I use second order upwind momentum discretization scheme, but unfortunately the results don't agree with the experimental ones. Meanwhile with the 1st order upwind momentum discretization scheme, the solution match better with the experimental one. What must I do in this case ?

Hello Everyone, I am simulating a small wind turbine using Ansys Fluent 19.0. Because of problem periodicity only one third of the fluid domain is simulated. The generated power is calculated using this equation: P=T*omega, with T is the rotor torque. My question is: the torque in this equation, is-it the calculated torque found by Ansys multiplied by 3 or only the calculated value ?.

Thank you.

Hello Everyone,

We have recently investigated a Semi-Supervised Deep Learning approach for anomaly detection of Wind Turbine generators based on vibration signals in the paper entitled "Anomaly Detection on Wind Turbines based on a Deep Learning Analysis of Vibration Signals" [1]. We found that vibration data enables a promising mechanism to detect abnormal behavior on wind turbines with a careful Machine Learning pipeline design. The paper presents an IoT-ready Machine Learning pipeline that encompasses data gathering, preprocessing, feature extraction, and classification. The approach is based on a Semi-Supervised Deep Learning approach, using Deep Autoencoders combined with a normality threshold selection based on the F1-Score analysis for a labeled data-set. The vibration data is preprocessed with band-pass filters and DC-component removal, rotation speed relation, and FFT. Finally, 11 features are extracted, from minimum, maximum, RMS, and standard deviation, to kurtosis, shape factor, energy, and entropy. The trained detection model achieved accuracy >99%, precision >97%, and recall of 100% for the evaluated data-set.

Moreover, with the IoT integration, the proposed workflow can notify users whenever abnormal behavior is noticed. What do you think about our findings? For more details, check the full paper at . If you have similar experiences with anomaly detection in rotating machinery, or if you have any comments or questions, feel free to leave a comment so we can start a fascinating discussion.

[1] José Luis Conradi Hoffmann, Leonardo Passig Horstmann, Mateus Martínez Lucena, Gustavo Medeiros de Araujo, Antônio Augusto Fröhlich, and Marcos Hisashi Napoli Nishioka, Anomaly Detection on Wind Turbines Based on a Deep Learning Analysis of Vibration Signals, In Applied Artificial Intelligence:9, 2021. DOI: 10.1080/08839514.2021.1966879.

Best Regards,

José Luis Conradi Hoffmann

Software/Hardware Integration Lab

Federal University of Santa Catarina, Florianópolis - SC, Brasil

What can cause severe bending conditions on the wind power plant's tower(only the tower part)? I assume that as the wind hits the blades it create a bending moment which vary linearly from wing tip to wing base. This moment will be transferred from blade's base to the top of the tower ( we have then a model like a beam with one end fixed and a bending moment on top). And I think that this moment has larger condtribution to tower's bending than the force coming from the wind as it hits the structure. Correct If I am wrong.

Hi guys, I want to test a wind turbine performance with different rotation speeds and a fixed wind velocity. But when I used a TSR of 6,7,8,9 I found high torque coefficient so multiplied by high rotation speed, an high power coefficient is resulted (0.78?!). What must I do to have logical results?. Thank you.

so its an reduced order model for modelling off shore wind turbine dynamics to support reliability and O and M so which component for example power production, root bending forces on blades, so which specific output will be the best to do my dissertation on ...

Thank you

Hello all, I am looking for a database on noise produced at wind turbine sites. Can you please refer some database, which are publicly available.

I have a question on Cp in the wind turbine. I have calculated the moment in the z-axis as my rotor also rotors along the z-axis. I got the moment values from my simulation. I applied the procedure which ansys recommended formula (P= torque x rotational velocity) for extracting power from the turbine. I got huge discrepancies between actual and theoretical. After calculating power, I have calculated Cp it comes around 0.8 to 1, but the Betz limit is 0.59. plz help me to calculate the Cp.

Conditions :

Turbine Aera =17.5 m2

R=3.5m

V=3

omega=2.14 rad/s

TSR=2

Fluid water (990 is the density)

We know wind turbines extract energy from the wind in order to produce electricity, the wind downstream of a turbine has a lower energy content than the wind upstream. Suppose, the understudy region is formed of two zones (Figure attached). In the dark red zone, the initial wind velocity is greater than that in the light red zone.

Bearing in mind the different initial wind velocities, How to determine the resulting wind speed, due to the wake effect of turbine 1 on turbine 2 (case 1) and of turbine 3 on turbine 4 (case 2)?

Scenario: The problem in case 2, perhaps the recovered wind speed at turbine 4 is greater than V

_{0}=8 m/s (initial speed at light red region)I want to check whether the new design vertical axis wind turbine rotates or not? How shall I check this? Is there any software for that?

Hi everyone,

I created a 2-bladed VAWT model. The dimension is the same as the turbine used in the experiment.

I have run a 3D transient simulation via sliding mesh. The calculated torque from the simulation is close to the experimental data.

Now, I want to repeat it with the MRF approach. All the settings are the same (mesh, rotational speed, boundary conditions, turbulence model, solver). However, I couldn`t get a good result from the MRF approach. It has far deviated (negative value).

I read from literature, there are only small differences between the torque calculated from MRF and sliding mesh.

I`m just wondering did I miss out on some important steps?

*The terms is only for Floating horizontal axis wind turbine and the fluid supposed to be humid air contained by the ocean.*Hi, I am working on wind turbine aerodynamic and I want to know if the stability of an aerodynamic body like an aircraft can be applied in the wind turbine field. If you have any ideas or propositions, please help me

The longest known wind turbine blade manufactured by General Electric - LM Wind Power was unveiled in 2019. What airfoils have been used from the root to the tip of the blade? Or how can I know the airfoil shape used in any working wind turbine blade of MW capacity?

Hi All,

I have a big wind data (wind speed and direction) for four wind turbines with fixed location.

I would like to find maximum or optimum wind power and minimum turbine cost with changing locations and the number of turbines using this wind data. I will use NMGAII as a optimization algorithm.

The problem is that I need wind information for varies wind turbine location. How can I find or calculate this information using current wind data.

Dear everyone .can i have resources or refrences for studying the motion of floating offshore wind turbine

Wind speed data set from European and Australian continents. Please share the same

Hi, I am working on small scale wind turbine. I use Ansys Fluent to investigate the rotor performances. Prior to the study, a mesh sensitivity test was conducted, the results of this study are presented in the table below. I want to know your opinion about these results.

Thank you.

Are there any wind turbine pitch control to track the Maximum Power from the wind turbine, similar to what's implemented in PV Systems.

Hello, I have the power curve of a turbine and the corresponding capacity factor at wind speed increments of 0.5.

I was wondering how I would calculate the power of a turbine with the following values and a year's time series of wind data.

I intend to use the equation P=0.5*CapacityFactor*Densty*Area*(Velocity)^3

I know it is sometimes common practice to use the maximum capacity factor, however, I know this is less accurate.

I am using MATLAB to code this.

The attached pfd file has been created with 16.0.1 (6018) version which I do not have access to.

I would appreciate it if someone with the PowerFactory v16.0.1 or newer could import the attached pfd file and export it to an older version (v15.1.7 or older).

Thanks

Wind energy has been established as the most profitable and tested energy since ancient times. It was first used on sailboats since ancient times, followed by windmills. Today it is included in "clean" energy sources, as they are commonly called non-polluting energy sources. A large part of the cost for the construction of a wind turbine is its support on the ground. Large wind turbines need huge reinforced concrete bases that use the same weight to prevent the wind turbine from overturning, which receives very large gusts of wind. There are wind turbines where their base consists of 2000 cubic meters of reinforced concrete. That is, they weigh 2000 m3 X specific weight of reinforced concrete which is 2450 kg / m3 = 4.900000 kg or 4.900 tons The cost of reinforced concrete in the mountains exceeds 300 euros per m3 That is, the cost of the base is 2000 m3 X 300 euros = 600,000 euros. If you put in the excavations, it is very expensive. In order to reduce the cost of support but also the cost of electricity, as well as the pollution from the manufacture and transport of concrete, the concrete base must be removed and replaced with deep ground anchors like that of the patent which I hope is the strongest anchor worldwide. The cost of support with my patent of this particular wind turbine of 2000 m3 will not exceed 80,000 euros.

I would like to ask you how can I simulate wind pressure on wind turbine towers in Abaqus as in the attached picture.

Hi evry one, i have a question about calculation of rate of change of frequncy in grid connected Wind turbine and how to choose the threshold value.