http://dspace.univ-setif.dz:8888/jspui/handle/123456789/1421 2026-05-26T08:49:51Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/3086 Titre: Distortion phenomena on transmission lines using corona modeling ATP/EMTP Auteur(s): Anane, Zahira; Bayadi, Abdelhafid; Huang, Kejie Résumé: The influence of corona on the propagation of transient voltages on transmission lines can be studied by modeling the impulse corona discharge, taking into account its physical properties. The technique of corona characteristics (charge-voltage) is more favorable than the propagation delay characteristic which is known to be less accurate and leads to results that are far from reality. In this paper, a mathematical model of corona discharge is integrated into the Alternative Transients Program of the ElectroMagnetic Transients Program software (ATP/EMTP), using the MODELS interface. The attenuation and distortion phenomena on the overhead transmission line caused by corona is modeled and simulated by the implementation of a corona model with the user-defined multi-branch type-94 circuit in ATP. Comparison between the computed results and literature experimental investigations gives a good agreement between them. 2019-01-27T00:00:00Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/3085 Titre: A dynamic corona model for EMTP computation of multiple and non-standard impulses on transmission lines using a type-94 circuit component Auteur(s): Anane, Zahira; Bayadi, Abdelhafid; Harid, Noureddine Résumé: In this paper, a new non-linear corona model for computation of overvoltages of standard and non-standard oscillatory shape is proposed and implemented in a new model in ATP-EMTP using MODELS simulation language. The corona model is solved simultaneously with the rest of simulated system interacting with it as a circuit element; this is accomplished by using the model with a type-94 circuit component. The model can be used to compute the lightning overvoltage that propagates on overhead transmission lines. The model computes the position of the corona space charge generated around the conductor to its diffusion at the conductor surface. An analysis for the computed results is made with an emphasis on the differences between the Q–V curves under impulse overvoltages of lightning, switching, oscillatory, and multiple-impulse type. Charge, electric field and voltage are related macroscopically in the model. The proposed model is verified by a comparison of the simulation results with measurements results available in the literature. 2019-01-23T00:00:00Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/3063 Titre: A new strategy for battery and supercapacitor energy management for an urban electric vehicle Auteur(s): Azizi, Idris; Radjeai, Hammoud Résumé: A new strategy of energy management between battery and supercapacitors for an urban electric vehicle is suggested in this paper. These two sources are connected in parallel to theDCbus through twobidirectionalDC–DCcon-verters enabling separate control over the power flowof each source. Vehicle dynamics with load torque applied on the shaft motor is to be considered. This strategy of energyman-agement permits dividing energy between the two sources depending on the state of charge of each source as well as on the vehicle displacement state such as stopping, acceler-ation, cruising down and uphill, and deceleration. The aim of the proposed strategy is the best use of energy through maximizing the use of SCs by transferring energy from bat-teries to SCs during the standstill phase or when the load applied to the vehicle is small; supercapacitors will then be ready in critical situations such as rapid acceleration or in high hills climbing. In order to validate the control design and evaluate our energy management strategy performance, a simulation of an urban hybrid electric vehicle movement with the Matlab/Simulink software is implemented. 2019-01-16T00:00:00Z http://dspace.univ-setif.dz:8888/jspui/handle/123456789/3000 Titre: Electromagnetic Design and Analysis of a Novel Axial-Transverse Flux Permanent Magnet Synchronous Machine Auteur(s): Bendib, Mohamed el Hadi; Hachemi, Mabrouk; Marignetti, Fabrizio Résumé: This paper analyzes a novel hybrid axial-transverse flux permanent magnet (PM) synchronous motor achieving high torque density. The stator pole pitch and the rotor pole pitch are the same. The motor is suitable for vehicle traction systems. The new axial-transverse machine has a single-sided or double-sided air gap. The machine has two adjacent quasi-U stator cores with ring-type wind-ing, and the rotor has two PM groups, one outer and one inner. The shape of quasi-U stator core allows changing the flux path without changing power supply polarity. The analytical expressions of the no-load back-EMF and the torque are derived, after the development of 3-D magnetic equivalent circuit (MEC) model. The 3-D finite ele-ment method (FEM) is used to analyze the magnetic field, torque, and cogging torque for different skewings of the PMs. 2018-12-09T00:00:00Z