Change search
ReferencesLink to record
Permanent link

Direct link
Substation Reliability Analysis Using PSS/E
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. (RCAM)
2011 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This report documents an MSc Thesis work of sub-transmission reliability study using PSS/Eperformed at Vattenfall. The network that is examined in this thesis is a sub-transmission network.Vattenfall Distribution Sweden is going to invest and rebuild the network in their 70 and 130 kVmeshed sub transmission network. To invest and rebuild in a network is very expensive. The gridowners want a reliable system that has a high reliability at a low cost.The main focus in this thesis is to examine different substation layouts. Calculating the failureintensities and unavailability for the different substation layouts gives the opportunity to do a life cyclecosts (LCC) on the different substations. With help of LCC calculations it is possible to find thesubstation that gives the lowest cost during a life time. Choosing right equipment in the grid will helpthe Vattenfall network company lower their equipment costs.The thesis work consists of mainly three parts as follows. Network modeling in PSS/EA subset of the existing sub transmission network was used in the project. This subset was taken outfrom the complete network model and modeled in PSS/E. Validation of PSS/E reliability modulesPSS/E reliability modules were new and have not been used earlier by the Vattenfall networkcompany. To be sure that the program calculates correctly a validation was performed. The main focusof the validation has been in looking if the program calculates the interrupted power correctly. Reliability analysis of different substation layoutsFor each of the substation layout the reliability was calculated. On component level (e.g. breaker,disconnector) different types of configuration were studied. To find out the best layout from aneconomical point of view a LCC calculation was also performed.The LCC calculation on the different substation layouts showed that the investment costs affect theresult very much. When the active power through the substation is low it is preferred to use asubstation that has low investment costs. At active power that is 30 MW or higher it is preferred to usethe substation with higher reliability (having higher investment cost). The result shows that using acombined breaker and disconnector instead of circuit breaker could lower the failure intensity andunavailability of substations.

Place, publisher, year, edition, pages
2011. , 70 p.
EES Examensarbete / Master Thesis, XR-EE-ETK 2011:013
Keyword [en]
Reliability, PSS/E, Substations, Sub-transmission network, Life Cycle Cost
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Engineering and Technology
URN: urn:nbn:se:kth:diva-48118OAI: diva2:456823
Available from: 2011-11-22 Created: 2011-11-16 Last updated: 2012-07-05Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Nosrati, Kamyar
By organisation
Electromagnetic Engineering
Electrical Engineering, Electronic Engineering, Information EngineeringEngineering and Technology

Search outside of DiVA

GoogleGoogle ScholarTotal: 24 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

Total: 531 hits
ReferencesLink to record
Permanent link

Direct link