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| | === Aerodynamics<br> === | | === Aerodynamics<br> === |
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| − | [[Image:Wind turbine blade aerodynamics.jpg|frame|center|Aerodynamics of a wind turbine blade]] | + | [[Image:Wind turbine blade aerodynamics.jpg|frame|center|Aerodynamics of a wind turbine blade]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | | | |
| | === Stall === | | === Stall === |
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| − | [[Image:Wind turbine blade aerodynamics - stall control.jpg|frame|center|Wind turbine blade aerodynamics - stall control]]Stall Control:<br>– Passive Stall:<br>Power of the wind turbine is limited by the aerodynamic characteristics<br>of the turbine.<br>– Active stall:<br>Power of the wind turbine is limited additionally by decreasing the pitch<br>angle (increasing the inflow angle ).<br> | + | [[Image:Wind turbine blade aerodynamics - stall control.jpg|frame|center|Wind turbine blade aerodynamics - stall control]]Stall Control:<br>– Passive Stall:<br>Power of the wind turbine is limited by the aerodynamic characteristics<br>of the turbine.<br>– Active stall:<br>Power of the wind turbine is limited additionally by decreasing the pitch<br>angle (increasing the inflow angle ).<br> |
| | | | |
| | === Pitch<br> === | | === Pitch<br> === |
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| − | [[Image:Wind turbine blade aerodynamics - pitching.jpg|frame|center|Aerodynamics at a wind turbine blade during control through pitching]]Pitch Control:<br>– Power of the wind turbine is limited by increasing the pitch angle<br>(decreasing the inflow angle <math>\alpha</math>)<br> | + | [[Image:Wind turbine blade aerodynamics - pitching.jpg|frame|center|Aerodynamics at a wind turbine blade during control through pitching]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | + | |
| | + | Pitch Control:<br>– Power of the wind turbine is limited by increasing the pitch angle<br>(decreasing the inflow angle <math>\alpha</math>)<br> |
| | | | |
| | == Wind turbine operation<br> == | | == Wind turbine operation<br> == |
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| | <br> | | <br> |
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| − | <br> | + | <ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref><br> |
| | | | |
| | == Generator concepts<br> == | | == Generator concepts<br> == |
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| − | [[Image:Overview Wind generator concepts.jpg|frame|center|Overview Wind generator concepts.jpg]] | + | [[Image:Overview Wind generator concepts.jpg|frame|center|Overview Wind generator concepts.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | | | |
| | === Fixed Speed Induction Generator<br> === | | === Fixed Speed Induction Generator<br> === |
| | | | |
| − | [[Image:Fixed speed induction generator.jpg|frame|center|Fixed speed induction generator.jpg]]Only fix speed operation possible (stall control required)<br>• Reactive power compensation required<br>• No reactive power control capability. Additional devices required:<br>– TSCs (Thyristor switched capacitors)<br>– STATCOMs<br>• Risk of dynamic voltage collapse<br>GTZ Expert Workshop 2010: Grid and System Integration of Wind Energy, 22/23.11.2010, Berlin/Germany<br>y g p<br>– > Typically, wind generators based on induction generators are asked to<br>disconnect in case of voltage dips<br> | + | [[Image:Fixed speed induction generator.jpg|frame|center|Fixed speed induction generator.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | + | |
| | + | Only fix speed operation possible (stall control required)<br>• Reactive power compensation required<br>• No reactive power control capability. Additional devices required:<br>– TSCs (Thyristor switched capacitors)<br>– STATCOMs<br>• Risk of dynamic voltage collapse<br>GTZ Expert Workshop 2010: Grid and System Integration of Wind Energy, 22/23.11.2010, Berlin/Germany<br>y g p<br>– > Typically, wind generators based on induction generators are asked to<br>disconnect in case of voltage dips<br> |
| | | | |
| | === Induction Generator with Variable Rotor Resistance<br> === | | === Induction Generator with Variable Rotor Resistance<br> === |
| | | | |
| − | [[Image:Induction Generator with Variable Rotor Resistance.jpg|frame|center|Induction Generator with Variable Rotor Resistance.jpg]]Simple concept for variable speed operation.<br>• Reactive power compensation required.<br>• No reactive power control capability. Additional devices required:<br>– TSCs (Thyristor switched capacitors)<br>– STATCOMs<br>• Limited LVRT capability. Dynamic voltage collapse problems have to<br>GTZ Expert Workshop 2010: Grid and System Integration of Wind Energy, 22/23.11.2010, Berlin/Germany<br>be mitigated by:<br>– Fast increase of rotor resistance during faults<br>– Additional reactive power compensation devices (typically TSCs)<br> | + | [[Image:Induction Generator with Variable Rotor Resistance.jpg|frame|center|Induction Generator with Variable Rotor Resistance.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | + | |
| | + | Simple concept for variable speed operation.<br>• Reactive power compensation required.<br>• No reactive power control capability. Additional devices required:<br>– TSCs (Thyristor switched capacitors)<br>– STATCOMs<br>• Limited LVRT capability. Dynamic voltage collapse problems have to<br>GTZ Expert Workshop 2010: Grid and System Integration of Wind Energy, 22/23.11.2010, Berlin/Germany<br>be mitigated by:<br>– Fast increase of rotor resistance during faults<br>– Additional reactive power compensation devices (typically TSCs)<br> |
| | | | |
| | === Doubly-Fed Induction Generator<br> === | | === Doubly-Fed Induction Generator<br> === |
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| − | [[Image:Doubly-fed induction generator.jpg|frame|center|Doubly-fed induction generator.jpg]][[Image:Doubly fed induction generatorf Power flow over- and subsyncronous speed.jpg|frame|center|Doubly fed induction generatorf Power flow over- and subsyncronous speed.jpg]] | + | [[Image:Doubly-fed induction generator.jpg|frame|center|Doubly-fed induction generator.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref>[[Image:Doubly fed induction generatorf Power flow over- and subsyncronous speed.jpg|frame|center|Doubly fed induction generatorf Power flow over- and subsyncronous speed.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | | | |
| − | === Generator with Fully Rated Converter === | + | === Generator with Fully Rated Converter === |
| | | | |
| − | [[Image:Generator with Fully Rated Converter Kopie.jpg|frame|center|Generator with Fully Rated Converter Kopie.jpg]] | + | [[Image:Generator with Fully Rated Converter Kopie.jpg|frame|center|Generator with Fully Rated Converter Kopie.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | | | |
| − | === Generator with fully rated converter and direct drive === | + | === Generator with fully rated converter and direct drive === |
| | | | |
| | <br> | | <br> |
| | | | |
| − | [[Image:Generator with Fully Rated Converter and direct drive.jpg|frame|center|Generator with Fully Rated Converter and direct drive.jpg]] | + | [[Image:Generator with Fully Rated Converter and direct drive.jpg|frame|center|Generator with Fully Rated Converter and direct drive.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | | | |
| | === Directly Coupled Synchronous Generator with Variable Gear Box<br> === | | === Directly Coupled Synchronous Generator with Variable Gear Box<br> === |
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| − | [[Image:Directly Coupled Synchronous Generator with Variable Gear Box.jpg|frame|center|Directly Coupled Synchronous Generator with Variable Gear Box.jpg]][[Portal:Wind]] | + | [[Image:Directly Coupled Synchronous Generator with Variable Gear Box.jpg|frame|center|Directly Coupled Synchronous Generator with Variable Gear Box.jpg]]<ref>Weigel S., Poeller M. (2010) Wind Turbine Generators (WTGs) Physical Principals and Generator Concepts, Presentation prepared by DigSILENT GmbH for the Wind Energy and Development Dialogue 2010, retrieved 27.8.2011 [[http://www.gtz.de/de/dokumente/gtz2010-en-wedd-1-2-WTG-concepts.pdf]]</ref> |
| | + | |
| | + | [[Portal:Wind]] |
| | | | |
| | [[Category:Wind]] | | [[Category:Wind]] |
of the turbine.
angle (increasing the inflow angle ).
Simple concept for variable speed operation.
• Reactive power compensation required.
• No reactive power control capability. Additional devices required:
– TSCs (Thyristor switched capacitors)
– STATCOMs
• Limited LVRT capability. Dynamic voltage collapse problems have to
GTZ Expert Workshop 2010: Grid and System Integration of Wind Energy, 22/23.11.2010, Berlin/Germany
be mitigated by:
– Fast increase of rotor resistance during faults
– Additional reactive power compensation devices (typically TSCs)
