EPE Association: NORpie 2000 - Topic 01: WIND TURBINE SYSTEMS

NORpie 2000 - Topic 01: WIND TURBINE SYSTEMS
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2000 > NORpie 2000 - Topic 01: WIND TURBINE SYSTEMS

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   Active Flicker Reduction from a Sea-Based 2.5 MW Wind Park Connected to a Weak Grid
By Tomáš Petru; Torbjörn Thiringer [View]
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Abstract: The grid voltage impact by a 5 * 0.5 MW sea-based wind park on a weak grid has been investigated. Converters with a rated power of half of the wind turbine rating are used in this park in order to reduce the flicker contribution of the wind turbines. The results show that the flicker reduction works very well and no major power quality disturbances occur on the grid, although the grid is very weak. In fact, the only limit to install further wind turbines on this grid is that the lines would be overheated, i.e. the same limit as with any other energy generating units.

   Combining Wind Farm and Energy Storage to Improved Grid Integration
By Henrik Bindner; Lars Henrik Hansen [View]
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Abstract: In many parts of the world and certainly in Europe large areas exist where the wind resources are good or even very good and the grid is relatively weak due to a small population. In these areas the capacity of the grid can very often be a limiting factor for the exploitation of the wind resource. Especially the voltage level and fluctuations can limit the exploitation. Grid reinforcement can be very expensive and difficult. Therefore other ways of making it possible to increase the amount of wind power that can be absorbed by the grid are being investigated. One of the technologies that can be used is buffering of energy by means of a battery storage. This option is investigated in the paper. It is shown how the power from a wind turbine can be controlled so that the power quality from the combined system is improved. The further development and application of energy storage combined with wind energy is a interesting option for facilitating the integration of wind energy in the power system.

   Experimental Results of a 100 kW Current-source PWM-converter Operation in a Variable Speed Wind Energy Drive
By P. Puttonen; M. Salo; H. Tuusa [View]
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Abstract: In Tampere University of Technology a variable speed wind energy system has been planned and constructed, in which the generator can be directly connected to the wind turbine without a gearbox by using a pulse-width modulated current- source converter (PWM-CSC). This paper presents the experimental results of the 100 kW PWM-CSC operation in a variable speed wind energy drive. The functioning of the whole system was tested in laboratory conditions using an asynchronous motor with chain gearing and a frequency converter instead of a wind turbine. In addition to the efficiency, nonharmonic line current components caused by the 6-pulse diode rectifier were also studied.

   Comparison of Generator Topologies for Direct-Drive Wind Turbines
By M.R. Dubois; H. Polinder; J.A. Ferreira [View]
[Download]

Abstract: In direct-drive wind turbines, the generator outer diameter and cost must be reduced substantially to allow a higher penetration of direct-drive wind-turbines on the market. In this paper, different generator topologies are investigated. A comparison is carried out, on the basis of 60 different machine prototypes built or designed by numerous authors. Data for those machines is found in the scientific literature. The comparison is based on torque density and cost/torque. Only the machines active material is considered.

NORpie 2000 - Topic 01: WIND TURBINE SYSTEMS
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2000 > NORpie 2000 - Topic 01: WIND TURBINE SYSTEMS
	[return to parent folder]

	Active Flicker Reduction from a Sea-Based 2.5 MW Wind Park Connected to a Weak Grid By Tomáš Petru; Torbjörn Thiringer	[View] [Download]
Abstract: The grid voltage impact by a 5 * 0.5 MW sea-based wind park on a weak grid has been investigated. Converters with a rated power of half of the wind turbine rating are used in this park in order to reduce the flicker contribution of the wind turbines. The results show that the flicker reduction works very well and no major power quality disturbances occur on the grid, although the grid is very weak. In fact, the only limit to install further wind turbines on this grid is that the lines would be overheated, i.e. the same limit as with any other energy generating units.

	Combining Wind Farm and Energy Storage to Improved Grid Integration By Henrik Bindner; Lars Henrik Hansen	[View] [Download]
Abstract: In many parts of the world and certainly in Europe large areas exist where the wind resources are good or even very good and the grid is relatively weak due to a small population. In these areas the capacity of the grid can very often be a limiting factor for the exploitation of the wind resource. Especially the voltage level and fluctuations can limit the exploitation. Grid reinforcement can be very expensive and difficult. Therefore other ways of making it possible to increase the amount of wind power that can be absorbed by the grid are being investigated. One of the technologies that can be used is buffering of energy by means of a battery storage. This option is investigated in the paper. It is shown how the power from a wind turbine can be controlled so that the power quality from the combined system is improved. The further development and application of energy storage combined with wind energy is a interesting option for facilitating the integration of wind energy in the power system.

	Experimental Results of a 100 kW Current-source PWM-converter Operation in a Variable Speed Wind Energy Drive By P. Puttonen; M. Salo; H. Tuusa	[View] [Download]
Abstract: In Tampere University of Technology a variable speed wind energy system has been planned and constructed, in which the generator can be directly connected to the wind turbine without a gearbox by using a pulse-width modulated current- source converter (PWM-CSC). This paper presents the experimental results of the 100 kW PWM-CSC operation in a variable speed wind energy drive. The functioning of the whole system was tested in laboratory conditions using an asynchronous motor with chain gearing and a frequency converter instead of a wind turbine. In addition to the efficiency, nonharmonic line current components caused by the 6-pulse diode rectifier were also studied.

	Comparison of Generator Topologies for Direct-Drive Wind Turbines By M.R. Dubois; H. Polinder; J.A. Ferreira	[View] [Download]
Abstract: In direct-drive wind turbines, the generator outer diameter and cost must be reduced substantially to allow a higher penetration of direct-drive wind-turbines on the market. In this paper, different generator topologies are investigated. A comparison is carried out, on the basis of 60 different machine prototypes built or designed by numerous authors. Data for those machines is found in the scientific literature. The comparison is based on torque density and cost/torque. Only the machines active material is considered.