EPE Association: EPE 2009 - Subtopic 14-1 - LS: 'Doubly Fed Induction Generator Drives'

EPE 2009 - Subtopic 14-1 - LS: 'Doubly Fed Induction 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 14-1 - LS: 'Doubly Fed Induction Generator Drives'

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   A Novel Approach of Direct Active and Reactive Power Control Allowing the Connection of the DFIG to the Grid
By Manel JEBALI-BEN GHORBAL, Jihen ARBI, Ilhem SLAMA-BELKHODJA [View]
[Download]

Abstract: A new method for Grid connection of a Doubly Fed Induction Generator (DFIG) based wind power generation system relying on DPC principles is presented. This control method, called Direct Power Control for Grid Connection (DPCGC), is particularly very simple and gives fast response of the stator voltage to meet the synchronization conditions. Indeed the fact that the efficiency of the widely known control of DPC is deeply investigated; this control presents an improved version of transmission network connection scheme without any external control loop. The proposed control strategy is tested by simulation tools. The results show the effectiveness of the control that ensures an excellent synchronization of the stator and grid voltages. Experimental results tested on a 4kW-DFIG prototype are carried to prove the excellent performance of the DPCGC using Field Programmable Gate Arrays (FPGA) technology.

   Dynamic Analysis of Start-up Strategies of AC Excited Double Fed Induction Machine for Pumped Storage Power Plant
By Rajesh SAIJU, Klaus KRUEGER, Jiri KOUTNIK [View]
[Download]

Abstract: The electric power generation using hydro potential is increasing around the globe due to many reasons like increasing power demand, deregulated markets, and environmental concerns etc. At the same time, extended transmission networks, higher degrees of interconnection between different networks, and fast connection and disconnection of the heavy loads demand flexible, fast power generation and consumption to and from the grid respectively. The variable speed pump storage hydropower plant with Double Fed Induction Machines [DFIM] is an excellent choice to tackle such problems, which also provides better dynamic stability compared to the conventional synchronous generator. The conventional starting procedure used in case of the synchronous generator can not be used. DFIM can be operated in positive or negative slip. This characteristic makes it possible to use partially decoupled variable frequency AC excitation system based upon power electronic converters. This paper focuses on a comparison of different start-up strategies and three phase short circuit by using the models developed in the SIMSEN software.

   Investigation of Doubly-Fed Induction Generator Drives Behaviour at Synchronous Operating Point in Wind Turbines
By Martin Bruns; Balduino Rabelo; Wilfried Hofmann [View]
[Download]

Abstract: State-of-the-art doubly-fed induction generator drives avoid operation at synchronous speed. Engineers point out stability problems and unequal heating of semiconductors and windings as the main reasons. The latter problem is consequence of unequal losses distribution in the semiconductors and rotor windings. This work investigates the thermal behaviour of the inverter switches at this singular point with the help of semiconductor loss and thermal models described along the text. Simulation results of the junction temperatures under different operating conditions are presented and analysed. These results should help on the dimensioning of the semiconductors and possible strategies to avoid the unequal heating are pointed out.

EPE 2009 - Subtopic 14-1 - LS: 'Doubly Fed Induction 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 14-1 - LS: 'Doubly Fed Induction Generator Drives'
	[return to parent folder]

	A Novel Approach of Direct Active and Reactive Power Control Allowing the Connection of the DFIG to the Grid By Manel JEBALI-BEN GHORBAL, Jihen ARBI, Ilhem SLAMA-BELKHODJA	[View] [Download]
Abstract: A new method for Grid connection of a Doubly Fed Induction Generator (DFIG) based wind power generation system relying on DPC principles is presented. This control method, called Direct Power Control for Grid Connection (DPCGC), is particularly very simple and gives fast response of the stator voltage to meet the synchronization conditions. Indeed the fact that the efficiency of the widely known control of DPC is deeply investigated; this control presents an improved version of transmission network connection scheme without any external control loop. The proposed control strategy is tested by simulation tools. The results show the effectiveness of the control that ensures an excellent synchronization of the stator and grid voltages. Experimental results tested on a 4kW-DFIG prototype are carried to prove the excellent performance of the DPCGC using Field Programmable Gate Arrays (FPGA) technology.

	Dynamic Analysis of Start-up Strategies of AC Excited Double Fed Induction Machine for Pumped Storage Power Plant By Rajesh SAIJU, Klaus KRUEGER, Jiri KOUTNIK	[View] [Download]
Abstract: The electric power generation using hydro potential is increasing around the globe due to many reasons like increasing power demand, deregulated markets, and environmental concerns etc. At the same time, extended transmission networks, higher degrees of interconnection between different networks, and fast connection and disconnection of the heavy loads demand flexible, fast power generation and consumption to and from the grid respectively. The variable speed pump storage hydropower plant with Double Fed Induction Machines [DFIM] is an excellent choice to tackle such problems, which also provides better dynamic stability compared to the conventional synchronous generator. The conventional starting procedure used in case of the synchronous generator can not be used. DFIM can be operated in positive or negative slip. This characteristic makes it possible to use partially decoupled variable frequency AC excitation system based upon power electronic converters. This paper focuses on a comparison of different start-up strategies and three phase short circuit by using the models developed in the SIMSEN software.

	Investigation of Doubly-Fed Induction Generator Drives Behaviour at Synchronous Operating Point in Wind Turbines By Martin Bruns; Balduino Rabelo; Wilfried Hofmann	[View] [Download]
Abstract: State-of-the-art doubly-fed induction generator drives avoid operation at synchronous speed. Engineers point out stability problems and unequal heating of semiconductors and windings as the main reasons. The latter problem is consequence of unequal losses distribution in the semiconductors and rotor windings. This work investigates the thermal behaviour of the inverter switches at this singular point with the help of semiconductor loss and thermal models described along the text. Simulation results of the junction temperatures under different operating conditions are presented and analysed. These results should help on the dimensioning of the semiconductors and possible strategies to avoid the unequal heating are pointed out.