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Author: | Shrestha, Rabhu |
Title: | Impacts of Exceptional Fault Sequences at the Finnish transmission grid |
Publication type: | Master's thesis |
Publication year: | 2005 |
Pages: | 79 Language: eng |
Department/School: | Sähkö- ja tietoliikennetekniikan osasto |
Main subject: | Sähköverkot ja suurjännitetekniikka (S-18) |
Supervisor: | Lehtonen, Matti |
Instructor: | Pottonen, Liisa |
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 S80 | Archive |
Keywords: | power system dynamic stability transmission grid protection systems long-duration faults loadflow |
Abstract (eng): | This study deals with impacts of exceptional fault sequence m transmission grid. More precisely, this research work takes the account of substation operations after three phase shunt faults and the impacts of possible failures of the operation on the power system. This work aims to forecast system condition after exceptional fault sequences of the network by detailed dynamic stability analysis on the real existing Finnish grid. In other words, this method enables the estimation of the system breakdown. The simulations done in this thesis takes into account of, three phase line shunt fault, fault location on the line, protection system and circuit breaker operations, different substation structures, and the dynamic behaviour of the power system after different loadflows. Power System Simulator (PSS/E 29.0) program package by Shaw PTI is used for stability analysis. The system conditions after the exceptional fault sequences in different load flows are modeled in the PSS/E and the results at different load flows are used to determine the most vulnerable conditions of the system leading the partial breakdown or the entire breakdown of the system. Contributing factors to partial and total system breakdown after line faults were studied in this research. On the basis of obtained results, it is interesting to observe that the complete system breakdown is dependent on total load flow of the entire grid rather than regional local load flows. It also estimates, amount of generation loss as the impacts of these exceptional faults, which contributes towards complete or partial system breakdown. |
ED: | 2005-07-14 |
INSSI record number: 29016
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