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An Analysis of Frequency Variations and its Implications on Connected Equipment for a Nanogrid during Islanded Operation
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0003-1894-6980
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-4004-0352
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0003-4074-9529
2018 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, article id en11092456Article in journal (Refereed) Published
Abstract [en]

Frequency, voltage and reliability data have been collected in a nanogrid for 48 weeks during islanded operation. Frequency values from the 48 week measurements were analyzed and compared to relevant limits. During 19.5% of the 48 weeks, the nanogrid had curtailed the production due to insufficient consumption in islanded operation. The curtailment of production was also the main cause of the frequency variations above the limits. When the microgrid operated on stored battery power, the frequency variations were less than in the Swedish national grid. 39.4% of all the interruptions that occurred in the nanogrid are also indirectly caused by the curtailment of solar production. Possible solutions for mitigating the frequency variations and lowering the number of interruptions are also discussed.

Place, publisher, year, edition, pages
Basel, Switzerland: MDPI, 2018. article id en11092456
Keywords [en]
frequency variations, islanded operation, nanogrids, power quality, power system reliability
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-71121DOI: 10.3390/en11092456ISI: 000446604500277Scopus ID: 2-s2.0-85053911592OAI: oai:DiVA.org:ltu-71121DiVA, id: diva2:1253661
Note

Validerad;2018;Nivå 2;2018-10-05 (svasva)

Available from: 2018-10-05 Created: 2018-10-05 Last updated: 2019-04-24Bibliographically approved

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Nömm, JakobRönnberg, SarahBollen, Math

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