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- W588868582 abstract "This research project has been conducted at RTE in order to study the transient stability afterasymmetrical faults. When three-phase short-circuits occur in a network, almost all the electricalpower is lost on the relevant line(s). Among all short-circuit types, it is the most drastic event and theissue has to be solved very quickly. But oddly, it is also the easiest problem to solve mathematicallyspeaking. This comes from the fact that the system stays balanced, and equations can be simplified.However with line-to-ground faults this is no longer the case, and transient stability analysis becomestricky.Until now, unbalanced situations have not been studied much. Since this kind of trouble is lessserious than losing all three phases, every protection devices on the network have been sized tocounter three-phase faults in time and avoid severe consequences. They will then also work for onephaseproblems.Despite this, there is a desire from RTE to understand– physically and mathematically – whathappens when one-phase faults occur, and it is the mission behind this master thesis. First, amathematical theoretical model was derived to examine anetwork’s stability without running anysimulation. Then, once simulation software programs were taken in hand, several tests were run on avery simplified network, and compared with the theory developed previously. Finally, theseexperiments were carried out on a much larger scale.It is important to understand that, except for the theoretical model, all the results and conclusions inthis document come from simulations. Even if a lot of tests and models led to them, theseconclusions must be handled with care. The goal of this work was also to have a betterunderstanding of unbalanced systems, of the Fortescue representation and thus, understand moreclearly the parameters required by simulation tools like Eurostag© for future studies." @default.
- W588868582 created "2016-06-24" @default.
- W588868582 creator A5090019675 @default.
- W588868582 date "2015-01-01" @default.
- W588868582 modified "2023-09-27" @default.
- W588868582 title "Transient Stability During Asymmetrical Faults" @default.
- W588868582 hasPublicationYear "2015" @default.
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