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Overvoltage due to single-phase and three-phase connected PV and what to do about it
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-3449-1579
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0003-4074-9529
Vattenfall R&D, Sweden.ORCID iD: 0000-0003-0749-7366
2019 (English)In: CIRED 2019 Proceedings, AIM , 2019, article id 370Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents the overvoltage caused by single and three-phase connected PV to a low-voltage distribution grid. Statistics are obtained based on source-impedance data for 40 000 customers. A stochastic approach is applied to a 28-customer low-voltage network and the probability of overvoltage is assessed. It is shown that the voltage rise due to single-phase connected PV is six times the rise for three-phase connected PV.To mitigate the overvoltage, grid-reinforcement, reactive power compensation, curtailment and coordinated connection of PV can be used. It is shown that reactive compensation is not effective in LV grids due to high R/X ratio. Coordinated connection helps in reducing the overvoltages caused by single-phase PV.Policy suggestions towards three-phase PV installations and coordinated single-phase PV connections are included in the paper.

Place, publisher, year, edition, pages
AIM , 2019. article id 370
Series
CIRED Proceedings, ISSN 2032-9644
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-74484DOI: 10.34890/1036OAI: oai:DiVA.org:ltu-74484DiVA, id: diva2:1324231
Conference
25th International Conference on Electricity Distribution (CIRED 2019), 3-6 June, 2019, Madrid, Spain
Projects
Hosting Capacity for Solar Power in Northern Sweden
Note

ISBN för värdpublikation: 978-2-9602415-0-1

Available from: 2019-06-13 Created: 2019-06-13 Last updated: 2020-09-16Bibliographically approved

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Mulenga, EnockBollen, MathEtherden, Nicholas

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CiteExportLink to record
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