EPE Association: EPE 2020 - LS6b: Wind Power

EPE 2020 - LS6b: Wind Power
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 05: Renewable Energy Power Systems > EPE 2020 - LS6b: Wind Power

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   A General Method to Damp Wind Turbine SSR With Different Transmission Systems
By Jian SUN [View]
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Abstract: This paper presents a general method to damp subsynchronous resonance (SSR) of type-III and type-IV wind turbines with different types of transmission systems. The method is based on reshaping the output impedance of wind turbines through a supplementary damping function added to existing turbine electrical control system. The types of transmission systems considered include long overhead transmission lines, overhead lines with series compensation, as well as high-voltage dc transmission.

   Cost of energy assessment of wind turbine configurations
By Catalin Gabriel DINCAN [View]
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Abstract: This paper presents findings from a comparative study on LCoE (levelized cost of energy) impact from various configurations of electrical power conversion in on-shore wind turbines. All comparisons are made against a baseline configuration, based on proprietary models and input data, thus boundary conditions and assumptions apply, which do not necessarily translate to other manufacturers of wind turbines and electrical power conversion solutions. In our analysis, we asked the question: which power conversion topology and converter building block size can offer the best LCoE reduction across a broad range of wind turbine products employing uniform architecture_ And which contributions to life-cycle cost dominate_ The methodology is explained, and results indicate, among those analysed, that a scalable, modular medium-voltage converter platform should be employed in a turbine down-tower architecture.

   Impact of silicon carbide devices in 2 MW DFIG based wind energy system
By Antxon ARRIZABALAGA [View]
[Download]

Abstract: Renewable energies are going through a major increment, mainly wind and photovoltaic energies, being market competitiveness the main driver for their massive penetration. As power converters are used to interface renewable energy systems with the utility grid, their optimization is crucial. For their superior conduction and switching capabilities, silicon carbide (SiC) semiconductors are considered for their use in the optimization of power electronics in doubly fed induction generator (DFIG) based wind energy systems (WES). Potential efficiency gain and volume reduction due to the use of SiC semiconductors are studied by simulation, explaining the models in detail. Commercial products are evaluated to calculate cooling systems (CS) and output filters volumes. The performance and volume of SiC converter is analyzed and compared to its Si counterpart, at different wind speeds and switching frequencies. A design for maximum efficiency and minimum CS volume, and another for minimum output filters volume without efficiency penalty are achieved. A switching frequency optimization is performed to obtain the minimum combined volume between the CS and output filter, still improving the Si converters efficiency at nominal wind speed conditions. The conclusion is that SiC semiconductors can improve the power converters efficiency and overall size in DFIG WES.

   Improved Direct-Model Predictive Control with a Simple Disturbance Observer for DFIGs
By Mohamed ABDELRAHEM [View]
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Abstract: In this paper, a computationally-efficient and robust direct-model predictive control (DMPC) technique for doubly-fed induction generators in variable-speed wind turbines systems is proposed. In order to avoid several predictions of the rotor currents, the reference voltage (RV) is directly computed from the reference currents, which notably reduces the calculation load. Furthermore, the disturbances due to parameters mismatches and un-modeled dynamics are considered in the RV calculation. Accordingly, the sensitivity to mismatches in the model parameters is avoided and a zero steady-state error is realized. Finally, based on the location of this RV, the quality function is evaluated for only two times to find the best switching state, which is applied to the power converter in the next sample. The performance of the suggested DMPC is experimentally validated and compared with the convention DMPC.

EPE 2020 - LS6b: Wind Power
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 05: Renewable Energy Power Systems > EPE 2020 - LS6b: Wind Power
	[return to parent folder]

	A General Method to Damp Wind Turbine SSR With Different Transmission Systems By Jian SUN	[View] [Download]
Abstract: This paper presents a general method to damp subsynchronous resonance (SSR) of type-III and type-IV wind turbines with different types of transmission systems. The method is based on reshaping the output impedance of wind turbines through a supplementary damping function added to existing turbine electrical control system. The types of transmission systems considered include long overhead transmission lines, overhead lines with series compensation, as well as high-voltage dc transmission.

	Cost of energy assessment of wind turbine configurations By Catalin Gabriel DINCAN	[View] [Download]
Abstract: This paper presents findings from a comparative study on LCoE (levelized cost of energy) impact from various configurations of electrical power conversion in on-shore wind turbines. All comparisons are made against a baseline configuration, based on proprietary models and input data, thus boundary conditions and assumptions apply, which do not necessarily translate to other manufacturers of wind turbines and electrical power conversion solutions. In our analysis, we asked the question: which power conversion topology and converter building block size can offer the best LCoE reduction across a broad range of wind turbine products employing uniform architecture_ And which contributions to life-cycle cost dominate_ The methodology is explained, and results indicate, among those analysed, that a scalable, modular medium-voltage converter platform should be employed in a turbine down-tower architecture.

	Impact of silicon carbide devices in 2 MW DFIG based wind energy system By Antxon ARRIZABALAGA	[View] [Download]
Abstract: Renewable energies are going through a major increment, mainly wind and photovoltaic energies, being market competitiveness the main driver for their massive penetration. As power converters are used to interface renewable energy systems with the utility grid, their optimization is crucial. For their superior conduction and switching capabilities, silicon carbide (SiC) semiconductors are considered for their use in the optimization of power electronics in doubly fed induction generator (DFIG) based wind energy systems (WES). Potential efficiency gain and volume reduction due to the use of SiC semiconductors are studied by simulation, explaining the models in detail. Commercial products are evaluated to calculate cooling systems (CS) and output filters volumes. The performance and volume of SiC converter is analyzed and compared to its Si counterpart, at different wind speeds and switching frequencies. A design for maximum efficiency and minimum CS volume, and another for minimum output filters volume without efficiency penalty are achieved. A switching frequency optimization is performed to obtain the minimum combined volume between the CS and output filter, still improving the Si converters efficiency at nominal wind speed conditions. The conclusion is that SiC semiconductors can improve the power converters efficiency and overall size in DFIG WES.

	Improved Direct-Model Predictive Control with a Simple Disturbance Observer for DFIGs By Mohamed ABDELRAHEM	[View] [Download]
Abstract: In this paper, a computationally-efficient and robust direct-model predictive control (DMPC) technique for doubly-fed induction generators in variable-speed wind turbines systems is proposed. In order to avoid several predictions of the rotor currents, the reference voltage (RV) is directly computed from the reference currents, which notably reduces the calculation load. Furthermore, the disturbances due to parameters mismatches and un-modeled dynamics are considered in the RV calculation. Accordingly, the sensitivity to mismatches in the model parameters is avoided and a zero steady-state error is realized. Finally, based on the location of this RV, the quality function is evaluated for only two times to find the best switching state, which is applied to the power converter in the next sample. The performance of the suggested DMPC is experimentally validated and compared with the convention DMPC.