EPE Association: EPE 2022 - DS3f: Wind-Energy Systems

EPE 2022 - DS3f: Wind-Energy Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2022 - DS3f: Wind-Energy Systems

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   Efficiency and Lifetime Analysis of Several Airborne Wind Energy Electrical Drive Concepts
By Bakr BAGABER [View]
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Abstract: Several electrical drive concepts and control strategies for airborne wind energy systems are compared in this work. The results suggest that the proposed modified kite trajectory control and the parallel drive concept can indeed reduce the required silicon chip area and prolong the converter's lifetime without significantly impacting the overall system efficiency. The compromise is however, a higher system complexity and larger torque ripples which could impact the noise profile of the electrical machine. The investigation also reveals that the power converter size is influenced by the installation location and the associated wind class. Where installations around land agricultural areas have the biggest impact on the drive train because of the high wind turbulence.

   Model-based Converter Control for the Emulation of a Wind Turbine Drive Train
By Alexander ERNST [View]
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Abstract: Failures in wind turbines are often attribute to faults in the power electronics. To investigate the fault mechanisms, a test bench was set up in which entire converters up to a power of 10 MW can be tested under changing climatic conditions and electrical loads. In order to generate realistic loads, one of the converters has to behave like a drive train of a wind turbine. Except from a few differences, the test bench which is used here and has a total power of 300 kW, is a scaled copy of the 10 MW test bench. This small test bench is used to perform preliminary developments of control concepts and test scenarios that can later be transferred to the large test bench. It consists mainly of two back-to-back converters and three transformers. The goal of this work is to force the behaviour of a drive train of a wind turbine on one of the converters. The second converter should be able to perform a generator current control, as is common in wind turbines. This paper shows the implementation of a wind rotor model, the connection with the existing generator model and the implementation of a speed-dependent generator load curve on the side of the device under test (DUT). The results demonstrate the functionality of the overall test bench. For this purpose, different curves of calculated and measured values such as wind speed, pitch angle, rotor speed, phase current and voltage under different conditions are shown. In summary, it can be shown that one of the converters behaves indeed like a drive train of a wind turbine and that realistic scenarios can be created based on measured wind speed curves.

   Operation and Selection of Multilevel Power Converters for Doubly Fed Induction Generator-based Wind Turbines
By Kapil JHA [View]
[Download]

Abstract: Operation of Doubly fed induction generator (DFIG) based wind turbine with 3-Level back-to-back converter has been discussed. Converter operation and loss analysis on a 3.2 MW-60Hz turbine shows that classical NPC converter is suitable for line side converter, while Active-NPC (ANPC) converter is optimal for rotor side converter realization.

   Stability Analysis of DFIG System connected with High-Frequency Capacitive Grid based on Closed-Loop Current Control and Direct Power Control
By Bin HU [View]
[Download]

Abstract: This paper analyzes the stability of doubly-fed induction generator (DFIG) system connected withhigh-frequency capacitive grid based on closed-loop current control (CCC) and direct power control(DPC). There will be some high-frequency resonance issues when employs DPC. Consequently, thereason of this high-frequency resonance and frequency coupling characteristic are studied.

EPE 2022 - DS3f: Wind-Energy Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2022 - DS3f: Wind-Energy Systems
	[return to parent folder]

	Efficiency and Lifetime Analysis of Several Airborne Wind Energy Electrical Drive Concepts By Bakr BAGABER	[View] [Download]
Abstract: Several electrical drive concepts and control strategies for airborne wind energy systems are compared in this work. The results suggest that the proposed modified kite trajectory control and the parallel drive concept can indeed reduce the required silicon chip area and prolong the converter's lifetime without significantly impacting the overall system efficiency. The compromise is however, a higher system complexity and larger torque ripples which could impact the noise profile of the electrical machine. The investigation also reveals that the power converter size is influenced by the installation location and the associated wind class. Where installations around land agricultural areas have the biggest impact on the drive train because of the high wind turbulence.

	Model-based Converter Control for the Emulation of a Wind Turbine Drive Train By Alexander ERNST	[View] [Download]
Abstract: Failures in wind turbines are often attribute to faults in the power electronics. To investigate the fault mechanisms, a test bench was set up in which entire converters up to a power of 10 MW can be tested under changing climatic conditions and electrical loads. In order to generate realistic loads, one of the converters has to behave like a drive train of a wind turbine. Except from a few differences, the test bench which is used here and has a total power of 300 kW, is a scaled copy of the 10 MW test bench. This small test bench is used to perform preliminary developments of control concepts and test scenarios that can later be transferred to the large test bench. It consists mainly of two back-to-back converters and three transformers. The goal of this work is to force the behaviour of a drive train of a wind turbine on one of the converters. The second converter should be able to perform a generator current control, as is common in wind turbines. This paper shows the implementation of a wind rotor model, the connection with the existing generator model and the implementation of a speed-dependent generator load curve on the side of the device under test (DUT). The results demonstrate the functionality of the overall test bench. For this purpose, different curves of calculated and measured values such as wind speed, pitch angle, rotor speed, phase current and voltage under different conditions are shown. In summary, it can be shown that one of the converters behaves indeed like a drive train of a wind turbine and that realistic scenarios can be created based on measured wind speed curves.

	Operation and Selection of Multilevel Power Converters for Doubly Fed Induction Generator-based Wind Turbines By Kapil JHA	[View] [Download]
Abstract: Operation of Doubly fed induction generator (DFIG) based wind turbine with 3-Level back-to-back converter has been discussed. Converter operation and loss analysis on a 3.2 MW-60Hz turbine shows that classical NPC converter is suitable for line side converter, while Active-NPC (ANPC) converter is optimal for rotor side converter realization.

	Stability Analysis of DFIG System connected with High-Frequency Capacitive Grid based on Closed-Loop Current Control and Direct Power Control By Bin HU	[View] [Download]
Abstract: This paper analyzes the stability of doubly-fed induction generator (DFIG) system connected withhigh-frequency capacitive grid based on closed-loop current control (CCC) and direct power control(DPC). There will be some high-frequency resonance issues when employs DPC. Consequently, thereason of this high-frequency resonance and frequency coupling characteristic are studied.