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Author: | Sjöberg, Anders |
Title: | Supercapacitor implementation on an uninterruptible power supply |
Superkondensator implementation av ett avbrottsfritt kraftförsörjnings system | |
Superkondensaattoritoteutus keskeytymättömän virransyötön järjestelmässä | |
Publication type: | Master's thesis |
Publication year: | 2014 |
Pages: | ix + 61 Language: eng |
Department/School: | Sähkötekniikan korkeakoulu |
Main subject: | Elektroniikka ja sovellukset (S3007) |
Supervisor: | Ovaska, Seppo |
Instructor: | Koehler, Stephan |
Electronic version URL: | http://urn.fi/URN:NBN:fi:aalto-201405131807 |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
Instructions Reading digital theses in the closed network of the Aalto University Harald Herlin Learning CentreIn the closed network of Learning Centre you can read digital and digitized theses not available in the open network. The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/ You can read theses on the Learning Centre customer computers, which are available on all floors.
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Location: | P1 Ark Aalto 1052 | Archive |
Keywords: | supercapacitor ultracapacitor battery energy reserve superkondensaattori ultrakondensaattori akku energiavarasto UPS superkondensator ultrakondensator batteri energireserv |
Abstract (eng): | The capacity of supercapacitors has risen to levels which makes it feasible to use them as energy reserves in applications that are dominated by battery-type energy reserves to improve cycling charge and discharge lifetime. This thesis explores the possibility to use supercapacitors as the main backup energy reserve for uninterruptible power supplies. Different types of UPS topologies and characteristics are reviewed followed by an overview of the supercapacitor. The modifications needed to convert a VRLA-battery UPS to a supercapacitor UPS are discussed followed by supercapacitor behavior simulation as an energy reserve. The UPS is only firmware modified, no hardware modifications were made. The implementation details are discussed and are then tested to verify the operation. Issues as, for example, mutual inductance affecting the battery converter is explored and a solution developed. The goal of converting a battery UPS to a supercapactor UPS is achieved and the UPS is able to provide 12 seconds of backup run time with supercapacitors as its main backup energy source. |
Abstract (swe): | Superkondensatorernas kapacitans har stigit, vilket möjliggör deras användning inom områden som vanligen präglas av ackumulator-energireserver. Superkondensatorer tål bättre laddningar och urladdningar i förhållande till ackumulatorer. I detta diplomarbete undersöks möjligheten att använda superkondensatorer som huvudenergireserv för avbrottsfria kraftförsörjningssystem (UPS). Olika UPS topologier och egenskaper presenteras, efter vilket superkondensatorerna presenteras. De nödvändiga förändringarna för att omvandla en vanlig ackumulator-UPS till en superkondensator-UPS presenteras och superkondensatorns funktion som energireserv simuleras. Bara UPS:ens mjukvaran modifieras, inga förändringar i hårdvaran görs. Implementationen testas och veriferas fungera rätt. Problem, som till exempel den ömsesidiga induktanssens påverkan på batteri-omvandlaren undersöks och en lösning presenteras. Målet att omvandla en ackumulator-UPS till en superkondensator-UPS fylls och UPS:sen klarar av att driva sin fulla specifierade belastning i 12 sekunder. |
ED: | 2014-05-18 |
INSSI record number: 49039
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