Reference : Online Determination of Grid Impedance Spectrum through Pseudo-Random Excitation of a...

	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a journal
	Discipline(s) :	Engineering, computing & technology : Energy
	To cite this reference:	http://hdl.handle.net/10993/16348

Title :	Online Determination of Grid Impedance Spectrum through Pseudo-Random Excitation of a Pulse Width Modulator
Language :	English
Author, co-author :	Neshvad, Surena [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
	Chatzinotas, Symeon [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
	Sachau, Jürgen [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC) >]
Publication date :	2014
Journal title :	Renewable Energy and Power Quality Journal
Publisher :	European Association for the Development of Renewable Energies, Environment and Power Quality
Peer reviewed :	No
Audience :	International
ISSN :	2172-038X
e-ISSN :	2172-038X
Country :	Spain
Event name :	ICREPQ'14
Event date :	7-4-2014 to 10-4-2014
Event organizer :	European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ)
Event place (city) :	Cordoba
Event country :	Spain
Keywords :	[en] Impedance ; PRBS ; PWM
Abstract :	[en] The last decade has seen a dramatic rise in renewable energy converters connected to the grid, consisting mostly of intermittent distributed generators on the medium or low voltage grid. Due to this evolution in energy transmission, improved monitoring and control of the distribution grid is becoming mandatory in order to efficiently integrate the new power sources and guarantee power quality, efficiency and reliability. Our paper describes a reliable and precise power grid impedance estimation method using an innovative scheme to control the Pulse Width Modulator’s pulse pattern on the inverters, in order to inject broad spectrum identification patterns. The generated harmonics and inter-harmonics will allow the online computation of the complete spectrum of the grid impedance at the Point of Common Coupling during normal operation. Simulations in typical grid situations verify that the proposed algorithm is robust to a realistic environment and can be used for automated feedback control.
Funders :	Fonds National de la Recherche - FnR ; Creos
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/10993/16348

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