Communications Internationales
Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/11
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Item Power transformer differential relay reliability assessment using false trip root cause analysis(IEEE, 2020) Zitouni, AbdelkaderPower transformer is vital element in power grid. Its failure may affect on the continuity of supply of electrical energy to the consumers. A differential relay, which is generally used for protecting this power transformer, may be affected by the disturbances such as inrush current, current transformer saturation and over-excitation due to external faults. Accordingly, false trips (mal-operation) of protection system may be resulted in. This research work proposes root cause analysis based on fault tree analysis to be used for assessing disturbances that lead to false trips. When the critical root causes are identified, mitigation measures are used. The model of security can help to quantify analytically the reliability of the considered protection systemItem Fast Ids – Vgs technique implementation for NBTI characterization(IEEE, 2020) Dhia Elhak, Messaoud; Zitouni, Abdelkader; Djezzar, Boualem; Benabdelmoumene, Abdelmadjid; Zatout, BoumedieneIn this paper, we implemented the fast I ds - V gs technique to get the entire characteristic of p-MOSFET devices; as fast as possible. This technique is used within MSM protocol under NBTI conditions. We reached 10μs in measurement time; a stress-measure delay (switching time) of about a hundred of milliseconds was reached. However, strengths and weaknesses of the technique have been discussed. Furthermore, Transconductance (g m ), subthreshold slope (SS) and mid-gap (MG) methods have also been implemented and discussed. NBTI parameter i.e. ΔV th , n, y and E a are extracted and compared to other results. A time exponent n of 0.149 has been touched. Activation energy E a = 0.039 eV and a field factor y = 0.41 MV. cm -1 for a stress time t s <; 10s have been obtainedItem A new method of oxide charges densities determination using Charge-Pumping technique in MOS structures(World Scientific and Engineering Academy and Society, 2008) Bentarzi, Hamid; Zitouni, Abdelkader; Kribes, YoucefItem Distance protective system performance enhancement using optimized digital filter(2011) Bentarzi, Hamid; Ouadi, Abderrahmane; Zitouni, AbdelkaderItem Microcontroller based protective relay testing system(World Scientific and Engineering Academy and Society (WSEAS), 2011) Ouadi, Abderrahmane; Bentarzi, Hamid; Chafai, Mahfoud; Zitouni, AbdelkaderItem PC based testing system for protective relay(IEEE, 2013) Chafai, Mahfoud; Bentarzi, Hamid; Ouadi, Abderrahmane; Zitouni, Abdelkader; Recioui, AbdelmadjidItem Measurement quality enhancement using digital filter in power grid integrating TCSC(IEEE, 2015) Zitouni, Abdelkader; Ouadi, Abderrahmane; Bentarzi, Hamid