EPE Association: EPE 2019 - DS2i: Wind Energy Systems

EPE 2019 - DS2i: Wind Energy Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 05: Renewable Energy Power Systems > EPE 2019 - DS2i: Wind Energy Systems

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   Emulation of prime movers in wind turbine and diesel generator systems for laboratory use
By Inaki ERAZO DAMIAN [View]
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Abstract: This paper presents an experimental system with hardware-in-the-loop emulation of both a dieselengine and wind turbine prime movers. System equations are analysed to model the required dynamicsof the prime movers and design the control of the emulators. Experimental and simulation results showthe dynamic response of the emulated systems.

   Island Mode Operation of Rotating-Voltage-Vector Control for Wind Power Plants
By Nastaran FAZLI [View]
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Abstract: Increasing penetration of converter-based generation in the power system has shown the important role of conventional power plants. Absence of the inherent capabilities of directly-connected synchronous machines in these conventional power plants in mitigation of frequency and provision ofancillary services in the power system has become a challenge for decentralised generation units. Ithas forced them to comply with grid restoration as the alternatives of synchronous generators. Themajority of installed capacity of wind turbines currently use grid-feedings current control, that theyare always dependent on another generation unit to synchronise with in islanding situation and haveno participation in ancillary services to protect frequency and voltage profile of the grid. Therefore,the necessity for another control performance under the definition of grid-supporting voltage sourceconverters has arisen. Rotating Voltage Vector Control's principle has placed it on this category. Rotating Voltage Vector Control models the converter as a voltage source which is capable of seamless operation in island mode as it requires no Phase-locked loop in its control method. This paper investigates the performance of RVVC in islanding operation mode following a split in the power system. Also, droop controllers are integrated into the control strategy to provide primary control features for the generation unit. Simulation results in Matlab are presented to show the performance of the control in the presence of loads, including resistive, directly-connected drives and converter-connected drives in islanding situation.

   Modeling and Dynamic Stability Analysis of a Wind Turbine Connected to a DC Collector Grid
By Yohan Fajar SIDIK [View]
[Download]

Abstract: In dc collector grids for offshore wind parks, stability issues may happen among power electronic converters and passive components. This paper aims to develop impedance models of a machine-side converter and a dc network to analyze the stability. Influences of wind turbine parameters and passivecomponents on the stability are analyzed both in frequency- and time-domain simulation. The resultscan be used to optimize certain parameters to have better dynamic performance and to avoid instabilities.

   Power Hardware In-the-Loop validation of DC-DC power converter for offshore wind energy
By Luc BOURSERIE [View]
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Abstract: The paper describes the development of a power converter small scale mock-up and a real time model of an off-shore wind farm. A Power Hardware In-the-Loop validation is proposed for a demonstration of grid architecture and control principles. The paper presents the design methodology of the PHIL test bench and underlines the contribution of PHIL in the design flow of power converter development for DC grid application. Experimental results of preliminary PHIL tests are presented.

   Stability margin definition for a converter-grid system based on diagonal dominance property in the sequence-frame
By Gabriele AMICO [View]
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Abstract: The increased presence of power converters in power networks has set new power system stability challenges. New methodologies have been proposed to analyse these systems and one of the most promising is the impedance-based stability criterion. To date using this method the grid interfaced converter is represented in terms of impedances and it is assumed that the converter impedances within the sequence-frame are decoupled. However, coupling between the components of the sequence-frame converter impedances have been observed, and different studies have shown how relevant this might become to the stability performance. Hence, a stability margin that takes such coupling into account is presented in this paper. This results in a more conservative measure of the stability robustness of the system, compared to the gain and phase margin figures employed in the impedance-based stability criterion. The presented study has been used to assess how the relative stability of a VSC system connected to a weak grid varies with its operating point, and experimental data have been used to support the analytical study.

   Wind energy electret-based electrostatic harvester
By Daniel Augusto CASTELLANOS CORONADO [View]
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Abstract: In this paper an electret-based electrostatic induction wind harvester is presented. The induction electrostatic field is produced with an electret. It is described how the electret and the harvester prototype have been obtained. A complete electrical characterization of the harvester and experimental results are then reported.

EPE 2019 - DS2i: Wind Energy Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 05: Renewable Energy Power Systems > EPE 2019 - DS2i: Wind Energy Systems
	[return to parent folder]

	Emulation of prime movers in wind turbine and diesel generator systems for laboratory use By Inaki ERAZO DAMIAN	[View] [Download]
Abstract: This paper presents an experimental system with hardware-in-the-loop emulation of both a dieselengine and wind turbine prime movers. System equations are analysed to model the required dynamicsof the prime movers and design the control of the emulators. Experimental and simulation results showthe dynamic response of the emulated systems.

	Island Mode Operation of Rotating-Voltage-Vector Control for Wind Power Plants By Nastaran FAZLI	[View] [Download]
Abstract: Increasing penetration of converter-based generation in the power system has shown the important role of conventional power plants. Absence of the inherent capabilities of directly-connected synchronous machines in these conventional power plants in mitigation of frequency and provision ofancillary services in the power system has become a challenge for decentralised generation units. Ithas forced them to comply with grid restoration as the alternatives of synchronous generators. Themajority of installed capacity of wind turbines currently use grid-feedings current control, that theyare always dependent on another generation unit to synchronise with in islanding situation and haveno participation in ancillary services to protect frequency and voltage profile of the grid. Therefore,the necessity for another control performance under the definition of grid-supporting voltage sourceconverters has arisen. Rotating Voltage Vector Control's principle has placed it on this category. Rotating Voltage Vector Control models the converter as a voltage source which is capable of seamless operation in island mode as it requires no Phase-locked loop in its control method. This paper investigates the performance of RVVC in islanding operation mode following a split in the power system. Also, droop controllers are integrated into the control strategy to provide primary control features for the generation unit. Simulation results in Matlab are presented to show the performance of the control in the presence of loads, including resistive, directly-connected drives and converter-connected drives in islanding situation.

	Modeling and Dynamic Stability Analysis of a Wind Turbine Connected to a DC Collector Grid By Yohan Fajar SIDIK	[View] [Download]
Abstract: In dc collector grids for offshore wind parks, stability issues may happen among power electronic converters and passive components. This paper aims to develop impedance models of a machine-side converter and a dc network to analyze the stability. Influences of wind turbine parameters and passivecomponents on the stability are analyzed both in frequency- and time-domain simulation. The resultscan be used to optimize certain parameters to have better dynamic performance and to avoid instabilities.

	Power Hardware In-the-Loop validation of DC-DC power converter for offshore wind energy By Luc BOURSERIE	[View] [Download]
Abstract: The paper describes the development of a power converter small scale mock-up and a real time model of an off-shore wind farm. A Power Hardware In-the-Loop validation is proposed for a demonstration of grid architecture and control principles. The paper presents the design methodology of the PHIL test bench and underlines the contribution of PHIL in the design flow of power converter development for DC grid application. Experimental results of preliminary PHIL tests are presented.

	Stability margin definition for a converter-grid system based on diagonal dominance property in the sequence-frame By Gabriele AMICO	[View] [Download]
Abstract: The increased presence of power converters in power networks has set new power system stability challenges. New methodologies have been proposed to analyse these systems and one of the most promising is the impedance-based stability criterion. To date using this method the grid interfaced converter is represented in terms of impedances and it is assumed that the converter impedances within the sequence-frame are decoupled. However, coupling between the components of the sequence-frame converter impedances have been observed, and different studies have shown how relevant this might become to the stability performance. Hence, a stability margin that takes such coupling into account is presented in this paper. This results in a more conservative measure of the stability robustness of the system, compared to the gain and phase margin figures employed in the impedance-based stability criterion. The presented study has been used to assess how the relative stability of a VSC system connected to a weak grid varies with its operating point, and experimental data have been used to support the analytical study.

	Wind energy electret-based electrostatic harvester By Daniel Augusto CASTELLANOS CORONADO	[View] [Download]
Abstract: In this paper an electret-based electrostatic induction wind harvester is presented. The induction electrostatic field is produced with an electret. It is described how the electret and the harvester prototype have been obtained. A complete electrical characterization of the harvester and experimental results are then reported.