EPE Association: NORpie 2004 - Topic 10: Wind Farms

NORpie 2004 - Topic 10: Wind Farms - System Disturbances
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   Analysis of a 1.7 MVA Doubly Fed Wind-Power Induction Generator during Power Systems Disturbances
By S. Seman; J. Niiranen; S. Kanerva; A. Arkkio [View]
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Abstract: The performance of a 1.7 MVA wind-power doubly fed induction generator (DFIG) under network fault is studied using simulator developed in MATLAB-Simulink. The simulator consists of the DFIG analytical model, the detailed frequency converter model including passive crowbar protection, and model of the transformer. The rotor-side frequency converter is controlled by a modified direct torque control (DTC). Simulation results show the transient behavior of the doubly fed induction generator when a sudden voltage dip is introduced with and without the crowbar implemented.

   Voltage Sag Response of PWM Rectiers for Variable-Speed Wind Turbines
By R. Ottersten; A. Petersson; K. Pietiläinen [View]
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Abstract: The voltage sag response of PWM rectifiers is analyzed for a candidate dc-link voltage control system. It is shown that the voltage sag response is mainly determined by the dynamics of the dc-link voltage and the control system. PWM rectifiers are found to be robust against voltage sags, but the remaining grid rms voltage limits the maximum active power that can be delivered to the utility grid during voltage sags.

   Dynamic Response of Grid-Connected Wind Turbine with Doubly Fed Induction Generator During Disturbances
By A. Perdana; O. Carlson; J. Persson [View]
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Abstract: The use of the Doubly-fed Induction Generator (DFIG) in large wind turbines (MW-class) is growing rapidly. In order to investigate the dynamic response of a wind turbine with DFIG connected to the power system during grid disturbance, a model has been developed. This model includes aerodynamics, the mechanical drive train, the induction generator as well as the control parts. The response of the system during grid disturbances is studied. An inclusion of saturation effect in the generator during faults is included as well.

   Investigating the Impact of Removing the Undervoltage Protection for Wind Turbines
By K. N. Al-Ghadhban; T. Thiringer [View]
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Abstract: This paper focuses on how to maintain active power production from wind turbines by disabling the undervoltage protection which sometimes disconnect wind turbines when it might not be absolutely necessary. This will lead to that the reliability of wind generation will increase. In addition, analysis and simulation of wind turbine generator protection will be shown including undervoltage, overcurrent and overspeed protections. All simulations in this paper where done using SIMPOW® program and DSL Code generator. A fictive power system grid was used in the study which was inspired from wind turbine grids on Gotland, an island on the Baltic sea.

   Control of a Wind Turbine with a Doubly Fed Induction Generator after Transient Failures
By J. I. Marvik; T. Björgum; B. I. Naess; T. Undeland; T. Gjengedal [View]
[Download]

Abstract: Large Wind turbines are often equipped with doubly fed induction generators. In numerous papers the stability problems are pointed out and there are also many papers describing control strategies for wind turbines equipped with doubly fed induction generators. This paper focuses on stability after a transient failure for wind turbines equipped with a doubly fed induction machine, some of the proposed control solutions are tested in PSCAD/EMTDC.

NORpie 2004 - Topic 10: Wind Farms - System Disturbances
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2004 > NORpie 2004 - Topic 10: Wind Farms - System Disturbances
	[return to parent folder]

	Analysis of a 1.7 MVA Doubly Fed Wind-Power Induction Generator during Power Systems Disturbances By S. Seman; J. Niiranen; S. Kanerva; A. Arkkio	[View] [Download]
Abstract: The performance of a 1.7 MVA wind-power doubly fed induction generator (DFIG) under network fault is studied using simulator developed in MATLAB-Simulink. The simulator consists of the DFIG analytical model, the detailed frequency converter model including passive crowbar protection, and model of the transformer. The rotor-side frequency converter is controlled by a modified direct torque control (DTC). Simulation results show the transient behavior of the doubly fed induction generator when a sudden voltage dip is introduced with and without the crowbar implemented.

	Voltage Sag Response of PWM Rectiers for Variable-Speed Wind Turbines By R. Ottersten; A. Petersson; K. Pietiläinen	[View] [Download]
Abstract: The voltage sag response of PWM rectifiers is analyzed for a candidate dc-link voltage control system. It is shown that the voltage sag response is mainly determined by the dynamics of the dc-link voltage and the control system. PWM rectifiers are found to be robust against voltage sags, but the remaining grid rms voltage limits the maximum active power that can be delivered to the utility grid during voltage sags.

	Dynamic Response of Grid-Connected Wind Turbine with Doubly Fed Induction Generator During Disturbances By A. Perdana; O. Carlson; J. Persson	[View] [Download]
Abstract: The use of the Doubly-fed Induction Generator (DFIG) in large wind turbines (MW-class) is growing rapidly. In order to investigate the dynamic response of a wind turbine with DFIG connected to the power system during grid disturbance, a model has been developed. This model includes aerodynamics, the mechanical drive train, the induction generator as well as the control parts. The response of the system during grid disturbances is studied. An inclusion of saturation effect in the generator during faults is included as well.

	Investigating the Impact of Removing the Undervoltage Protection for Wind Turbines By K. N. Al-Ghadhban; T. Thiringer	[View] [Download]
Abstract: This paper focuses on how to maintain active power production from wind turbines by disabling the undervoltage protection which sometimes disconnect wind turbines when it might not be absolutely necessary. This will lead to that the reliability of wind generation will increase. In addition, analysis and simulation of wind turbine generator protection will be shown including undervoltage, overcurrent and overspeed protections. All simulations in this paper where done using SIMPOW® program and DSL Code generator. A fictive power system grid was used in the study which was inspired from wind turbine grids on Gotland, an island on the Baltic sea.

	Control of a Wind Turbine with a Doubly Fed Induction Generator after Transient Failures By J. I. Marvik; T. Björgum; B. I. Naess; T. Undeland; T. Gjengedal	[View] [Download]
Abstract: Large Wind turbines are often equipped with doubly fed induction generators. In numerous papers the stability problems are pointed out and there are also many papers describing control strategies for wind turbines equipped with doubly fed induction generators. This paper focuses on stability after a transient failure for wind turbines equipped with a doubly fed induction machine, some of the proposed control solutions are tested in PSCAD/EMTDC.