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Publications (10 of 188) Show all publications
de Oliveira, R. A., Salles, R. S., Rönnberg, S., de Carli, M. P. & Leborgne, R. C. (2024). Harmonic Anomalies due to Geomagnetically Induced Currents as a Potential Cause of Protection Mal-Trips at the South Atlantic Anomaly Area. IEEE Transactions on Power Delivery
Open this publication in new window or tab >>Harmonic Anomalies due to Geomagnetically Induced Currents as a Potential Cause of Protection Mal-Trips at the South Atlantic Anomaly Area
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2024 (English)In: IEEE Transactions on Power Delivery, ISSN 0885-8977, E-ISSN 1937-4208Article in journal (Refereed) Epub ahead of print
Place, publisher, year, edition, pages
IEEE, 2024
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-100716 (URN)10.1109/TPWRD.2024.3353487 (DOI)
Note

Funder: Swedish Energy Agency and Rönnbäret Foundation (24549);

This article has previously appeared as a manuscript in a thesis.

Available from: 2023-08-24 Created: 2023-08-24 Last updated: 2024-01-29
Gutierrez-Ballesteros, E., Rönnberg, S. & Gil-de-Castro, A. (2023). Comparison of Measurement-based Classification Methods of LED Lamps. IEEE Open Access Journal of Power and Energy, 10
Open this publication in new window or tab >>Comparison of Measurement-based Classification Methods of LED Lamps
2023 (English)In: IEEE Open Access Journal of Power and Energy, E-ISSN 2687-7910, Vol. 10Article in journal (Refereed) Published
Abstract [en]

The topology of a device will determine the impact said device has on the grid and how immune that device is for disturbances in the grid. LED lamps are very commonly used devices, with different topologies available in the market, each topology showing different behavior when connected to a grid. For power quality studies, it is important to classify LED lamps, without breaking them to know the topology. Several classification methods are found in the literature with this purpose. In this paper, four methods from different papers for classifying LED lamps have been applied to a group of 21 LED lamps with active power consumption below 25 W. It has been observed that the applicability of the methods may lead to a gap of knowledge needed for classification, leaving space for personal criteria when classifying, that can be afforded using unsupervised Machine Learning. Two unsupervised Machine Learning methods were applied using the electrical parameters and statistics proposed in literature.

Place, publisher, year, edition, pages
IEEE, 2023
Keywords
Behavioral sciences, Classification methods, comparison, Current measurement, Distortion, LED lamps, Machine Learning, Reactive power, topology, Topology, Total harmonic distortion
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Computer Sciences
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-97042 (URN)10.1109/OAJPE.2023.3263793 (DOI)000995880200008 ()2-s2.0-85153341982 (Scopus ID)
Funder
Swedish Energy Agency
Note

Validerad;2023;Nivå 2;2023-07-12 (sofila);

Available from: 2023-05-10 Created: 2023-05-10 Last updated: 2023-09-05Bibliographically approved
Giri, M. & Rönnberg, S. (2023). Considerations for EV usage for distributed energy storage employment & charging infrastructure. In: Paulo F. Ribeiro; Rafael S. Salles (Ed.), Distributed Energy Storage in Urban Smart Grids: (pp. 121-147). Institution of Engineering and Technology
Open this publication in new window or tab >>Considerations for EV usage for distributed energy storage employment & charging infrastructure
2023 (English)In: Distributed Energy Storage in Urban Smart Grids / [ed] Paulo F. Ribeiro; Rafael S. Salles, Institution of Engineering and Technology , 2023, p. 121-147Chapter in book (Other academic)
Place, publisher, year, edition, pages
Institution of Engineering and Technology, 2023
Series
IET Energy Engineering Series ; 214
National Category
Infrastructure Engineering
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-103560 (URN)10.1049/pbpo214e_ch6 (DOI)2-s2.0-85166098708 (Scopus ID)
Note

ISBN for host publication: 9781839535499, 9781839535505

Available from: 2024-01-11 Created: 2024-01-11 Last updated: 2024-01-11Bibliographically approved
A. Oliveira, R., S. Salles, R. & Rönnberg, S. K. (2023). Deep Learning for Power Quality with Special Reference to Unsupervised Learning. In: 27th International Conference on Electricity Distribution (CIRED 2023): . Paper presented at 27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023 (pp. 935-939). IEEE, Article ID 10417.
Open this publication in new window or tab >>Deep Learning for Power Quality with Special Reference to Unsupervised Learning
2023 (English)In: 27th International Conference on Electricity Distribution (CIRED 2023), IEEE, 2023, p. 935-939, article id 10417Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2023
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Computer Sciences
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-100717 (URN)10.1049/icp.2023.0593 (DOI)2-s2.0-85181538517 (Scopus ID)
Conference
27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023
Note

ISBN for host publication: 978-1-83953-855-1;

Available from: 2023-08-24 Created: 2023-08-24 Last updated: 2024-02-05Bibliographically approved
de Oliveira, R. A., Nakhodchi, N., De Souza Salles, R. & Rönnberg, S. K. (2023). Deep Learning Graphical Tool Inspired by Correlation Matrix for Reporting Long-Term Power Quality Data at Multiple Locations of an MV/LV Distribution Grid. In: 27th International Conference on Electricity Distribution (CIRED 2023): . Paper presented at 27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023 (pp. 609-613). IEEE, Article ID 10324.
Open this publication in new window or tab >>Deep Learning Graphical Tool Inspired by Correlation Matrix for Reporting Long-Term Power Quality Data at Multiple Locations of an MV/LV Distribution Grid
2023 (English)In: 27th International Conference on Electricity Distribution (CIRED 2023), IEEE, 2023, p. 609-613, article id 10324Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2023
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-103655 (URN)10.1049/icp.2023.0433 (DOI)2-s2.0-85181541951 (Scopus ID)
Conference
27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023
Note

ISBN for host publication: 978-1-83953-855-1

Available from: 2024-01-15 Created: 2024-01-15 Last updated: 2024-02-08Bibliographically approved
Sutaria, J., Rönnberg, S. & Espin Delgado, A. (2023). Factors influencing the induced primary emission and induced secondary emission in the frequency range of 2 to 150 kHz. Electric power systems research, 224, Article ID 109725.
Open this publication in new window or tab >>Factors influencing the induced primary emission and induced secondary emission in the frequency range of 2 to 150 kHz
2023 (English)In: Electric power systems research, ISSN 0378-7796, E-ISSN 1873-2046, Vol. 224, article id 109725Article in journal (Refereed) Published
Abstract [en]

The induced primary emission leads to changes in the primary emission of a device and the induced secondary emission leads to changes in the propagation of supraharmonics in the adjacent phase due to the connection of single-phase loads spread over three phases in an installation. The induced primary emission and induced secondary emission are shown to give a significant contribution to the total emission measured at a given point in an installation. The induction of the emission is caused by the inductive and capacitive coupling among the conductors within the cables. This paper presents an analysis of four parameters that impact the magnitude of the induced emissions. Simulations carried out in COMSOL, show that the type of cable used impacts the induced emission and studies show that shielded cable with a stranded conductor with the shield grounded will lead to a reduction in the induced emissions. Among the other parameters, i.e., the load and transformer impedance and the length of the cable, the length of the cable is dominating in deciding the magnitude of the induced emissions. Analysis is carried out using Monte Carlo simulation and varying parameters stochastically. For all investigated parameters there is a strong frequency dependency. The stochastic variation of the load impedance in one phase causes a variation of 5% whereas the change in length of the cable leads to a maximum 40% variation in the considered frequency range for induced primary emission. Measurement results are presented to validate the results.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Crosstalk, inductive coupling, power quality, supraharmonics, primary emission, secondary emission
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-96640 (URN)10.1016/j.epsr.2023.109725 (DOI)2-s2.0-85165970374 (Scopus ID)
Funder
Swedish Energy Agency, 43090-2
Note

Validerad;2023;Nivå 2;2023-08-07 (joosat);

Licens fulltext: CC BY License

This article has previously appeared as a manuscript in a thesis.

Available from: 2023-04-17 Created: 2023-04-17 Last updated: 2023-10-11Bibliographically approved
Espín-Delgado, Á. & Rönnberg, S. (2023). Harmonic Distortion in Microgrids in Islanded Operation. In: 27th International Conference on Electricity Distribution (CIRED 2023): . Paper presented at 27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023 (pp. 1265-1269). IEEE, Article ID 10513.
Open this publication in new window or tab >>Harmonic Distortion in Microgrids in Islanded Operation
2023 (English)In: 27th International Conference on Electricity Distribution (CIRED 2023), IEEE, 2023, p. 1265-1269, article id 10513Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2023
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-103649 (URN)10.1049/icp.2023.0692 (DOI)2-s2.0-85181538492 (Scopus ID)
Conference
27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023
Note

Funder: Rönnbäret foundation;

ISBN for host publication: 978-1-83953-855-1

Available from: 2024-01-15 Created: 2024-01-15 Last updated: 2024-02-06Bibliographically approved
Malfoy, A., A. Oliveira, R. & Rönnberg, S. K. (2023). Harmonics in the Transmission and Distribution Grid and their Relation to Geomagnetically Induced Currents. In: 27th International Conference on Electricity Distribution (CIRED 2023): . Paper presented at 27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023 (pp. 60-64). IEEE, Article ID 00121.
Open this publication in new window or tab >>Harmonics in the Transmission and Distribution Grid and their Relation to Geomagnetically Induced Currents
2023 (English)In: 27th International Conference on Electricity Distribution (CIRED 2023), IEEE, 2023, p. 60-64, article id 00121Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
IEEE, 2023
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Astronomy, Astrophysics and Cosmology
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-103646 (URN)10.1049/icp.2023.0241 (DOI)2-s2.0-85181532521 (Scopus ID)
Conference
27th International Conference and Exhibition on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023
Note

ISBN for host publication: 978-1-83953-855-1; 

Available from: 2024-01-16 Created: 2024-01-16 Last updated: 2024-01-30Bibliographically approved
Nakhodchi, N., Bakhtiari, H., Bollen, M. H. J. & Rönnberg, S. K. (2023). Including uncertainties in harmonic hosting capacity calculation of a fast EV charging station utilizing Bayesian statistics and harmonic correlation. Electric power systems research, 214, Article ID 108933.
Open this publication in new window or tab >>Including uncertainties in harmonic hosting capacity calculation of a fast EV charging station utilizing Bayesian statistics and harmonic correlation
2023 (English)In: Electric power systems research, ISSN 0378-7796, E-ISSN 1873-2046, Vol. 214, article id 108933Article in journal (Refereed) Published
Abstract [en]

The harmonic emission from an electric vehicle fast charger depends on factors like charger topology, EV type, initial state of charge of EV battery, as well as supply voltage and background distortion. This paper presents the results from harmonic current measurement of a fast charger for a period of one month in Sweden that has charged a variety of EVs from different brands under different state of charge and background distortion. Besides the common harmonic emission pattern, a high level of variation in emission is observed that can affect the aggregation of the emission from multiple chargers. To include such uncertainties, the harmonic hosting capacity is obtained for a fast EV charging station in a stochastic way. A new method, based on Bayesian statistics and the correlation between harmonic magnitude and fundamental magnitude, is proposed for the generation of stochastic samples. It is shown that the proposed method, to a high extent, can model the stochastic behavior of harmonic emission from a fast charger. Furthermore, the results show that neglecting the correlation between harmonic magnitude and fundamental magnitude can underestimate the harmonic hosting capacity.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Electric vehicle charging, harmonic analysis, harmonic distortion, hosting capacity, power system harmonics
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
urn:nbn:se:ltu:diva-93358 (URN)10.1016/j.epsr.2022.108933 (DOI)000886826000009 ()2-s2.0-85140914689 (Scopus ID)
Note

Validerad;2022;Nivå 2;2022-11-08 (hanlid);

Funder: Göteborg Energi Research Foundation; Umeå Energi;

This article has previously appeared as a manuscript in a thesis

Available from: 2022-09-30 Created: 2022-09-30 Last updated: 2023-09-05Bibliographically approved
Giri, M., Sadeghi, B., Rönnberg, S., Johansson, J. & Ekman, J. (2023). Observations of radiated and conducted emissions from an Electric Plane charging station. In: 2023 International Symposium on Electromagnetic Compatibility - EMC Europe: . Paper presented at 2023 International Symposium on Electromagnetic Compatibility - EMC Europe 2023, Krakow, Poland, September 4-8, 2023. Institute of Electrical and Electronics Engineers Inc.
Open this publication in new window or tab >>Observations of radiated and conducted emissions from an Electric Plane charging station
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2023 (English)In: 2023 International Symposium on Electromagnetic Compatibility - EMC Europe, Institute of Electrical and Electronics Engineers Inc. , 2023Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2023
Series
EMC Europe, ISSN 2325-0356, E-ISSN 2325-0364
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering; Electronic Systems
Identifiers
urn:nbn:se:ltu:diva-103302 (URN)10.1109/EMCEurope57790.2023.10274227 (DOI)2-s2.0-85174617130 (Scopus ID)979-8-3503-2400-6 (ISBN)979-8-3503-2401-3 (ISBN)
Conference
2023 International Symposium on Electromagnetic Compatibility - EMC Europe 2023, Krakow, Poland, September 4-8, 2023
Available from: 2023-12-13 Created: 2023-12-13 Last updated: 2024-02-12Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4004-0352

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