EPE Association: EPE 2013 - LS9b: Generator Converter Control and Fault Ride through Methods

EPE 2013 - LS9b: Generator Converter Control and Fault Ride through Methods
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 14: Converters for rotating and linear generators > EPE 2013 - LS9b: Generator Converter Control and Fault Ride through Methods

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   ANALYSIS OF DOUBLY FED INDUCTION GENERATOR WIND TURBINE SYSTEM DURING ONE PHASE-TO-GROUND FAULT
By Yusuf YASA, Evren ISEN, Yilmaz SOZER, Erkan MESE, Hilmi GURLEYEN [View]
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Abstract: This paper presents detailed analysis of doubly fed induction generator (DFIG) wind turbine electrical components during normal and unbalanced fault condition. Wind turbine components are individually modeled and then combined in a simulation process which is called coupled simulation. The coupled simulation results show that grid frequency oscillation occurs on q and d axis currents under one phase-ground fault condition. Experimental study has been done to show the effects of fault on rotor currents. Same behavior is also found in experimental rotor currents. Additionally experimental study shows that rotor currents are very sensitive to the grid fault voltage level.

   LVRT dynamic performance analysis in a detailed time domain simulation scenario beyond the impedance divisor fault
By Markel ZUBIAGA, Sergio AURTENETXEA, Agurtzane ETXEGARAI, Esther TORRES [View]
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Abstract: This paper presents the implementation of the low voltage ride-through (LVRT) voltage curve based on two different grid models. The first grid model is based on an inductive divisor, the classic model used in electromagnetic transient analyses and the second one is based on an equivalent dynamic model of the grid which is usually used in dynamic analyses of power systems. Both grid models and their associated LVRT voltage curves are implemented by using electromagnetic time domain simulation (PSCAD/EMTDC). The LVRT curve is evaluated based on the Spanish REE grid.

   Reduction of Converter Rating for New Induction Generator System by 3rd Harmonic Injection
By Noriyuki KIMURA, Kenta ISOZUMI, Kahiwagi SHUTA, Toshimitsu MORIZANE, Omori HIDEKI [View]
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Abstract: In this paper, the new wind power generation system, which uses the diode rectifier to convert the real power from the induction generator to the intermediate dc voltage, and the inverter to supply the reactive power necessary to excite the induction generator, has been investigated. Reduction of the peak current of the voltage source converter (VSC) which excites the induction generator (IG) is most important factor to reduce the total cost of the system. The simulation results show that the 3rd harmonic injection can allow to reduce the VSC rating about 13\%. The simulation results confirm the same performance with the reduced dc voltage. It is also shown that the 3rd harmonic component of the current from the VSC is suppressed. This also reduced the peak current value about 16\%. These effects can reduce the total VSC rating to 72\% of that without 3rd harmonic injection. However, 5th harmonic component was increased and the cause should be investigated. The experimental results will be provided for the final version of the full paper.

EPE 2013 - LS9b: Generator Converter Control and Fault Ride through Methods
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 14: Converters for rotating and linear generators > EPE 2013 - LS9b: Generator Converter Control and Fault Ride through Methods
	[return to parent folder]

	ANALYSIS OF DOUBLY FED INDUCTION GENERATOR WIND TURBINE SYSTEM DURING ONE PHASE-TO-GROUND FAULT By Yusuf YASA, Evren ISEN, Yilmaz SOZER, Erkan MESE, Hilmi GURLEYEN	[View] [Download]
Abstract: This paper presents detailed analysis of doubly fed induction generator (DFIG) wind turbine electrical components during normal and unbalanced fault condition. Wind turbine components are individually modeled and then combined in a simulation process which is called coupled simulation. The coupled simulation results show that grid frequency oscillation occurs on q and d axis currents under one phase-ground fault condition. Experimental study has been done to show the effects of fault on rotor currents. Same behavior is also found in experimental rotor currents. Additionally experimental study shows that rotor currents are very sensitive to the grid fault voltage level.

	LVRT dynamic performance analysis in a detailed time domain simulation scenario beyond the impedance divisor fault By Markel ZUBIAGA, Sergio AURTENETXEA, Agurtzane ETXEGARAI, Esther TORRES	[View] [Download]
Abstract: This paper presents the implementation of the low voltage ride-through (LVRT) voltage curve based on two different grid models. The first grid model is based on an inductive divisor, the classic model used in electromagnetic transient analyses and the second one is based on an equivalent dynamic model of the grid which is usually used in dynamic analyses of power systems. Both grid models and their associated LVRT voltage curves are implemented by using electromagnetic time domain simulation (PSCAD/EMTDC). The LVRT curve is evaluated based on the Spanish REE grid.

	Reduction of Converter Rating for New Induction Generator System by 3rd Harmonic Injection By Noriyuki KIMURA, Kenta ISOZUMI, Kahiwagi SHUTA, Toshimitsu MORIZANE, Omori HIDEKI	[View] [Download]
Abstract: In this paper, the new wind power generation system, which uses the diode rectifier to convert the real power from the induction generator to the intermediate dc voltage, and the inverter to supply the reactive power necessary to excite the induction generator, has been investigated. Reduction of the peak current of the voltage source converter (VSC) which excites the induction generator (IG) is most important factor to reduce the total cost of the system. The simulation results show that the 3rd harmonic injection can allow to reduce the VSC rating about 13\%. The simulation results confirm the same performance with the reduced dc voltage. It is also shown that the 3rd harmonic component of the current from the VSC is suppressed. This also reduced the peak current value about 16\%. These effects can reduce the total VSC rating to 72\% of that without 3rd harmonic injection. However, 5th harmonic component was increased and the cause should be investigated. The experimental results will be provided for the final version of the full paper.