Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Investigation and Determination to the Most Effective Method of Voltage Control for Zone Substations
University of Borås, School of Engineering.
2007 (English)Independent thesis Basic level (degree of Bachelor)Student thesisAlternative title
Utredning och fastställande av effektivaste metoden för spänningsreglering i mottagningsstationer (Swedish)
Abstract [en]

Power quality is an issue of ever increasing importance, and with ever increasing customer expectations on such issues, the significance of supplying customers with high quality power can never be underestimated. One of the most important matters that define power of good quality is the voltage level each customer is supplied with. Most appliances are designed to operate satisfactorily only within a narrow range of supply voltages. Inappropriate supply voltages can not only result in poor performing appliances, it can also cause equipment damage, increase distribution losses and decrease the revenue for the power supplier. The point that is electrically closest to the consumers, where the voltage is actively regulated and monitored, is usually in a zone substation, where on load tap changers on the zone substation transformers ensure that the voltage in the distribution network is kept within appropriate limits. The supply voltage is therefore directly reliant on correct operation and functionality of the on load tap changers and their controlling automatic voltage regulators. The main objective that this thesis seeks to achieve is to determine the most effective method of voltage control to be utilised with different types of zone substations, primarily with respect to the algorithms utilised in the automatic voltage regulator. Metering data from the distribution network has been utilised to examine the present voltage performance of the distribution network. Different reasons that can cause voltage fluctuations and unpredictable voltage performance are investigated and discussed. Voltage levels that are investigated are steady-state voltages, hence transients, flicker, and sags and swells of short duration have not been taken into consideration. The present voltage levels are also examined in network models, with the aim to investigate the impact of altered methods of voltage control in zone substations. The accuracy of the utilised network models is also investigated, by comparing metering data to modelled voltage levels. This thesis is undertaken with the assistance of Ergon Energy Corporation Limited, a corporation owned and operated by the Queensland Government. Ergon Energy owns and operates the subtransmission and distribution network in regional Queensland. It is intended that this thesis will aid understanding of the voltage performance of the distribution network, and that it will bring clarity to how the voltage in the distribution network should be controlled in order to achieve optimum voltage performance.

Place, publisher, year, edition, pages
University of Borås/School of Engineering , 2007.
Series
Kandidatuppsats ; 1/2007
Keywords [en]
voltage regulation, voltage fluctuations, power quality
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hb:diva-18683Local ID: 2320/3116OAI: oai:DiVA.org:hb-18683DiVA, id: diva2:1310617
Note
Uppsatsnivå: CAvailable from: 2019-04-30 Created: 2019-04-30

Open Access in DiVA

fulltext(5826 kB)19 downloads
File information
File name FULLTEXT01.pdfFile size 5826 kBChecksum SHA-512
40e038c528c4e5ee28488b46aa5e3ff77b4af41f4a007908ecc39302e596c041489a8ddb9dd809f1d037f6f61eeed06496d6077590e5ddd48b296d2324f6e094
Type fulltextMimetype application/pdf

By organisation
School of Engineering
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 19 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 1 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf