Estimation of an unbalanced grid impedance using a three-phase power converter

Kukkola, Jarno; Pirsto, Ville; Routimo, Mikko; Hinkkanen, Marko

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Estimation of an unbalanced grid impedance using a three-phase power converter

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Title:	Estimation of an unbalanced grid impedance using a three-phase power converter
Author(s):	Kukkola, Jarno ; Pirsto, Ville ; Routimo, Mikko ; Hinkkanen, Marko
Date:	2020-09-07
Language:	en
Pages:	10
Department:	Electric Drives Renewable Energy in Electrical Power Department of Electrical Engineering and Automation
ISBN:	9789075815368
Series:	Proceedings of the 22nd European Conference on Power Electronics and Applications, EPE’20 ECCE Europe
DOI-number:	10.23919/EPE20ECCEEurope43536.2020.9215676
Keywords:	Converter control, Estimation technique, Impedance measurement, Three-phase system
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Citation: Kukkola , J , Pirsto , V , Routimo , M & Hinkkanen , M 2020 , Estimation of an unbalanced grid impedance using a three-phase power converter . in Proceedings of the 22nd European Conference on Power Electronics and Applications, EPE’20 ECCE Europe . , 9215676 , European Conference on Power Electronics and Applications , IEEE , European Conference on Power Electronics and Applications , Virtual, Online , 07/09/2020 . https://doi.org/10.23919/EPE20ECCEEurope43536.2020.9215676
Abstract: This paper proposes a real-time method for estimating an unbalanced grid impedance using a three-phase converter. In the method, a periodic single-frequency or multi-frequency excitation signal is added to the converter voltage reference. The converter measures currents and voltages at the point of common coupling. The impedance estimate is obtained from the measurements using sliding discrete Fourier transform (SDFT). The method is experimentally validated.

Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-202010165843 Email this Export to RefWorks QR Code Print BibTex Tweet