Modeling, Control and Design of Wind Energy Systems at TU München

Flashcards and summaries for Modeling, Control and Design of Wind Energy Systems at the TU München

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Study with flashcards and summaries for the course Modeling, Control and Design of Wind Energy Systems at the TU München

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

4 Excersice: how does AEP and COE behave at low or high WT class? 

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

4 What are whirling modes?

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

4 2 Options to avoid resonance:

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

4 3 Important factors to assess resonance

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

6 Which 4 areas have to work together to build a wind turbine?

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

6 What is the goal of defining and calculating different deisgn situations?

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

6 name 5 Design sitiations (DLC Design load cases)

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

5 What is the problem with the control in the transition region? Explain the 2 stategies against it

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

5 How does control work for the variable spped pitch/torque regulated wind turbine with tip speed contraint?

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

5 On what does the actual cut-in wind speed depend on?

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

5 What is better constant rotor speed or TSR strategy?

Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

4 Axercise What its the "brute-force optimization"?

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Exemplary flashcards for Modeling, Control and Design of Wind Energy Systems at the TU München on StudySmarter:

Modeling, Control and Design of Wind Energy Systems

4 Excersice: how does AEP and COE behave at low or high WT class? 

At high WT classes (like 4) so low wind speed, the AEP is low and therefore the CoE is high

Modeling, Control and Design of Wind Energy Systems

4 What are whirling modes?

lagging of blades so that the CG shifts

Modeling, Control and Design of Wind Energy Systems

4 2 Options to avoid resonance:

design controller to avoid operation around the resonance frequency

increase stiffness of the blade to increase the resonance excitation frequency (keep in mind that higher excitation frequencies usually carry less energy and are therefore less harmful)

Modeling, Control and Design of Wind Energy Systems

4 3 Important factors to assess resonance

– damping of the mode,

– actual frequency ratio forcing/natural,

– amplitude/energy of excitation

Modeling, Control and Design of Wind Energy Systems

6 Which 4 areas have to work together to build a wind turbine?

aerodynamics, structure, systems, control

Modeling, Control and Design of Wind Energy Systems

6 What is the goal of defining and calculating different deisgn situations?

covering the entire lifetime (20-25 ears) operating range of a WT, incluting faults and extreme events

Modeling, Control and Design of Wind Energy Systems

6 name 5 Design sitiations (DLC Design load cases)

1. power production

2. power production + occurrence of fault

3. start up

4. normal shut down

5. emergency shut-down

Modeling, Control and Design of Wind Energy Systems

5 What is the problem with the control in the transition region? Explain the 2 stategies against it

Both controls (torque and pitch) possible

-> PID on pitch and LUT on torque

-> PID on pitch and PI for torque

Modeling, Control and Design of Wind Energy Systems

5 How does control work for the variable spped pitch/torque regulated wind turbine with tip speed contraint?

like without tip speed contraint but in the transiotion region (region 2,5 constant rotor speed) commanded collectie pitch and electrical torque needed 

Modeling, Control and Design of Wind Energy Systems

5 On what does the actual cut-in wind speed depend on?

Generated torque has to bigger than the friction in bearing, drive-train, generator

Modeling, Control and Design of Wind Energy Systems

5 What is better constant rotor speed or TSR strategy?

Constant rotor speed strategy has always a lower power capture than constant TSR strategy

Modeling, Control and Design of Wind Energy Systems

4 Axercise What its the "brute-force optimization"?

In a parametric study, the cost function (in this case CoE) is evaluated for multiple different

values of the design variables (in this case rotor diameter), and the value that minimizes the

cost function is picked. This approach is also called “brute-force optimization” as it relies

simply on trying different values of the design variable.

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