rian.ie - Browse

Limited By:	Subject = Voltage Unbalance;

Marked Mark

ANALYSIS OF A VARIABLE SPEED DOUBLE-FED INDUCTION GENERATOR WIND TURBINE DURING NETWORK VOLTAGE UNBALANCE CONDITIONS. (2007)

Kearney, Joseph; Conlon, Michael

ANALYSIS OF A VARIABLE SPEED DOUBLE-FED INDUCTION GENERATOR WIND TURBINE DURING NETWORK VOLTAGE UNBALANCE CONDITIONS. (2007)

Kearney, Joseph; Conlon, Michael

Abstract:

The behaviour of Double-Fed Induction Generators to supply network voltage unbalance is investigated. The paper shows the effects that voltage unbalance can have on a DFIG, using Matlab/Simulink. The results from simulations show that voltage unbalance affects both the induction generator and the rotor converter, due to the high unbalanced currents generated. The ability to modify the control strategy of a DFIG to compensate for voltage unbalance is outlined and simulations show the improvements to the performance of the DFIG.

https://arrow.dit.ie/engscheleart/219

Marked Mark

Analysis of Compensation Techniques Applied to the Control of Converter Connected Synchronous Wind Turbines and DFIG’s During Grid Disturbances. (2012)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

Analysis of Compensation Techniques Applied to the Control of Converter Connected Synchronous Wind Turbines and DFIG’s During Grid Disturbances. (2012)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

Abstract:

This paper investigates control schemes to improve the performance of converter connected synchronous generators and DFIG’s to grid voltage unbalance and grid faults. Both the synchronous generator with a full converter and a DFIG are modelled in Matlab/Simulink. The control schemes of both turbines are modified to improve their performance during grid disturbances including grid voltage unbalance and single-phase faults. These disturbances are introduced into the models at specific times to analyse the performance of the wind generation systems. The performances of both systems to the grid disturbances are compared and the results are analysed.

https://arrow.dit.ie/engscheleart/226

Marked Mark

Analysis of Converter Connected Synchronous Wind Turbines to Grid Disturbances. (2011)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

Analysis of Converter Connected Synchronous Wind Turbines to Grid Disturbances. (2011)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

Abstract:

This paper investigates the performance of synchronous generators to grid voltage unbalance and grid faults. A Model of a synchronous generator with a full converter is implemented in the SimPowerSystems toolbox in Matlab/Simulink. Methods to modify the converter control schemes to improve the synchronous generator systems response to grid voltage unbalance and grid faults are investigated. Grid faults including grid voltage unbalance, and line-to-ground faults are introduced into the model at specific times to analyse the performance of the wind generation system. Improvements in the performance of the synchronous generator WECS to the grid disturbances are illustrated.

https://arrow.dit.ie/engscheleart/225

Marked Mark

PERFORMANCE OF A VARIABLE SPEED DOUBLE-FED INDUCTION GENERATOR WIND TURBINE DURING NETWORK VOLTAGE UNBALANCE CONDITIONS (2006)

Kearney, Joseph; Conlon, Michael

PERFORMANCE OF A VARIABLE SPEED DOUBLE-FED INDUCTION GENERATOR WIND TURBINE DURING NETWORK VOLTAGE UNBALANCE CONDITIONS (2006)

Kearney, Joseph; Conlon, Michael

Abstract:

The issues of the negative performance of DFIG’s due to supply network voltage unbalance are outlined in this paper. The paper shows the effects that voltage unbalance can have on a DFIG, using the power simulation program DigSilent. The results from simulations show that voltage unbalance affects the both the induction generator and the rotor converter, due to the high unbalanced currents generated. The ability to modify the control strategy of a DFIG to compensate for voltage unbalance is outlined and a proposal to build a test-rig suitable to implement such a system is suggested.

https://arrow.dit.ie/engscheleart/218

Marked Mark

The Application of Multi Frequency Resonant Controllers in in a DFIG to Improve Performance by Reducing Unwanted Power and Torque Pulsations and Reducing Current Harmonics. (2010)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

The Application of Multi Frequency Resonant Controllers in in a DFIG to Improve Performance by Reducing Unwanted Power and Torque Pulsations and Reducing Current Harmonics. (2010)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

Abstract:

The paper describes a method to control the rotor-side and grid side converters in a DFIG when subjected to the effects of network voltage unbalance conditions. Multi Frequency Resonant Controllers are incorporated into the grid side and rotor side converters to assist in the control functions. The Resonant Controllers are tuned to twice the network frequency to assist in the control of power and torque pulsations and to three times the network frequency to assist in the control of the generated third harmonic currents. A DFIG model is implemented in Matlab/Simulink and simulations show the reduction in power and torque oscillations and a reduction in the 3rd harmonic currents generated as a result of the applied voltage unbalance.

https://arrow.dit.ie/engscheleart/224

Marked Mark

The Application of Multi Frequency Resonant Controllers in in a DFIG to Improve Performance by Reducing Unwanted Power and Torque Pulsations and Reducing Current Harmonics. (2010)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

The Application of Multi Frequency Resonant Controllers in in a DFIG to Improve Performance by Reducing Unwanted Power and Torque Pulsations and Reducing Current Harmonics. (2010)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

Abstract:

https://arrow.dit.ie/engscheleart/222

Marked Mark

The Control of Rotor Side and Grid Side Converters in a DFIG During Network Voltage Unbalance Conditions Using Resonant Current Controllers. (2010)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

The Control of Rotor Side and Grid Side Converters in a DFIG During Network Voltage Unbalance Conditions Using Resonant Current Controllers. (2010)

Kearney, Joseph; Conlon, Michael; Coyle, Eugene

Abstract:

This paper implements control techniques to enable improved operation of DFIG’s when subjected to the effects of network voltage unbalance conditions. The control scheme involves the integration of a resonant regulator into the PI controllers of both the rotor side and grid side converters in a DFIG. The resonant controller is tuned to twice the network frequency (2ωe) and designed to mitigate against the oscillations in a DFIG due to network voltage unbalance conditions. The grid side converter controller also incorporates a second resonant controller tuned to three times the grid frequency (3ωe) to alleviate the amplitude of the generated third harmonic currents. The control schemes of both the rotor side and grid side converters are coordinated to enable concurrently reductions in both the torque pulsations and the total DFIG power oscillations. A DFIG model is implemented in the program Matlab/Simulink and simulations show the reduction in power and torque oscillations and a red...

https://arrow.dit.ie/engscheleart/223