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Titre: | Inter-area oscillation minimization in power system |
Auteur(s): | Tsebia, Mohammed Bentarzi, Hamid(Directeur de thèse) |
Mots-clés: | Power systems Electrical energy |
Date de publication: | 2023 |
Editeur: | Université M'Hamed Bougara : Institut de génie électrique et électronique |
Résumé: | Inter-area oscillations result from system events coupled with a poorly damped
electric power system. These oscillations are observed in large power systems,
encompassing groups of generators or generating plants connected by relatively weak
tie lines. The low-frequency modes (0.1 to 0.8 Hz) often involve groups of generators
or generating plants on one side of the tie oscillating against groups of generators on
the other side of the tie bus. These oscillations are undesirable as they lead to
suboptimal power flows, inefficient grid operation, and, consequently, grid instability.
Mitigating these oscillations is of vital concern. To address inter-area
oscillations, equipment such as Static Var Compensators (SVCs) and various Flexible
AC Transmission System (FACTS) devices are increasingly employed. The feasibility
of these techniques has been made possible by recent advancements in power
electronic technology. The involvement of SVCs and FACTS devices in the
transmission network is referred to as Variable Series Compensation (VSC).
In addition to FACTS devices, the application of Superconducting Magnetic
Energy Storage (SMES) to enhance inter-area oscillation damping has been reported.
Although Power System Stabilizers (PSS) are present in many generators, their effect
is limited to the local area and does not effectively damp out inter-area oscillations.
In this research work, it has been demonstrated that inter-area oscillations can
be detected using phasor measurement units (PMUs) installed in the power system. In
a typical implementation, one or more generators in a system are selected as Remote
Feedback Controllers (RFCs). These RFCs receive synchronized phasor
measurements from one or more remote phasor measurement units. Analyzing the
phase angles provided from multiple sites enables the detection of inter-area
oscillations. If an oscillation is detected, a control signal is sent to the generator's
voltage regulator, effectively modulating the voltage and damping out the oscillation |
Description: | 83 p. : ill. ; 30 cm |
URI/URL: | http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/12171 |
Collection(s) : | Doctorat
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