EPE Association: EPE 2009 - Subtopic 14-2 - LS: 'Low Voltage Ride Through of Generator Drives'

EPE 2009 - Subtopic 14-2 - LS: 'Low Voltage Ride Through of Generator Drives'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 14: 'Electrical Energy Generating Systems, Renewable Energy Systems' > EPE 2009 - Subtopic 14-2 - LS: 'Low Voltage Ride Through of Generator Drives'

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   Control of a doubly-fed induction generator under unbalanced conditions considering the converter limits
By Oriol GOMIS-BELLMUNT, AdriÃ JUNYENT-FERRE, Andreas SUMPER, Montserrat MATA-DUMENJO, Marc SALA LLUMA [View]
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Abstract: The present paper addresses the control of doubly fed induction generators under unbalanced voltage sags considering the converter limits. A control strategy is proposed by choosing certain current reference values in the positive and negative sequences so that the torque and the DC voltage are kept stable during such unbalanced sags considering the converter limits.

   High Performance Controller for DFIG of Grid Connected Wind Turbines
By Jean Patric DA COSTA, Humberto PINHEIRO, Thomas DEGNER, Arnold GUNTER [View]
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Abstract: This paper presents a high performance stationary frame non-linear controller for DFIG which improves the behavior of the grid connected wind turbines especially during asymmetric disturbances at the PCC. A controller design procedure that guarantees the DFIG stability under uncertainties and disturbances at grid side is presented in details. Furthermore, it is demonstrated in the paper that with the proposed controller different goals such as control of grid side active and reactive power, minimization of toque pulsation under unbalance operation and improvement of the low voltage ride through capability can be easily achieved. Simulations and experimental results are given to illustrate the good performance of a grid connected DFIG with the proposed controller.

   High Voltage Ride Through with FACTS for Wind Turbines with Doubly Fed Induction Generator
By Christian WESSELS, Friedrich W. FUCHS [View]
[Download]

Abstract: In future grid codes wind farms will have to fulfill demanding fault ride through requirements. Among several grid faults the voltage swell is a critical event. Wind farms with doubly-fed induction generators will not be able to fulfill the new grid code requirements without additional fault mitigation equipment. In this publication the applicability of the Dynamic Voltage Restorer and the Static Synchronous Compensator tomitigate a three phase voltage swell without phase angle variation at a wind turbine is investigated and compared. The mitigation equipment adds the missing high voltage ride through capability to the wind energy system in order to become grid compliant. The function, control structure and design and the performance is presented and verified by simulations.

EPE 2009 - Subtopic 14-2 - LS: 'Low Voltage Ride Through of Generator Drives'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 14: 'Electrical Energy Generating Systems, Renewable Energy Systems' > EPE 2009 - Subtopic 14-2 - LS: 'Low Voltage Ride Through of Generator Drives'
	[return to parent folder]

	Control of a doubly-fed induction generator under unbalanced conditions considering the converter limits By Oriol GOMIS-BELLMUNT, AdriÃ JUNYENT-FERRE, Andreas SUMPER, Montserrat MATA-DUMENJO, Marc SALA LLUMA	[View] [Download]
Abstract: The present paper addresses the control of doubly fed induction generators under unbalanced voltage sags considering the converter limits. A control strategy is proposed by choosing certain current reference values in the positive and negative sequences so that the torque and the DC voltage are kept stable during such unbalanced sags considering the converter limits.

	High Performance Controller for DFIG of Grid Connected Wind Turbines By Jean Patric DA COSTA, Humberto PINHEIRO, Thomas DEGNER, Arnold GUNTER	[View] [Download]
Abstract: This paper presents a high performance stationary frame non-linear controller for DFIG which improves the behavior of the grid connected wind turbines especially during asymmetric disturbances at the PCC. A controller design procedure that guarantees the DFIG stability under uncertainties and disturbances at grid side is presented in details. Furthermore, it is demonstrated in the paper that with the proposed controller different goals such as control of grid side active and reactive power, minimization of toque pulsation under unbalance operation and improvement of the low voltage ride through capability can be easily achieved. Simulations and experimental results are given to illustrate the good performance of a grid connected DFIG with the proposed controller.

	High Voltage Ride Through with FACTS for Wind Turbines with Doubly Fed Induction Generator By Christian WESSELS, Friedrich W. FUCHS	[View] [Download]
Abstract: In future grid codes wind farms will have to fulfill demanding fault ride through requirements. Among several grid faults the voltage swell is a critical event. Wind farms with doubly-fed induction generators will not be able to fulfill the new grid code requirements without additional fault mitigation equipment. In this publication the applicability of the Dynamic Voltage Restorer and the Static Synchronous Compensator tomitigate a three phase voltage swell without phase angle variation at a wind turbine is investigated and compared. The mitigation equipment adds the missing high voltage ride through capability to the wind energy system in order to become grid compliant. The function, control structure and design and the performance is presented and verified by simulations.