WEBREVIEW

Characterisation of an Optical Strain Gauge for Pantograph Applications .

Davies T., Khanniche M. S., Khanniche R. — 2011-03-14T10:21:51Z

An optical strain gauge is developed and characterised for an active pantograph for
high-speed electrical trains applications. Indeed, the pantograph is subjected to a
continuous impact forces when it makes contact with the 25 kV overhead ac line.
To detect load behaviour experienced, by the electrical pick-up on the pantograph,
tests were carried out. The results show that the strain gauge responded linearly to
static load over the range 0 to 80 Newton. Also, a high repeatability was (...)

- Volume 01 issue 03 / Optical strain gauge, Load behaviour, Electromagnetic field, Repeatability

Comparison between Optimal Minimization of Total Harmonic Distortion and Harmonic Elimination with Voltage Control candidates for Multilevel Inverters.

Fellah M. K., Sahali Y. — 2011-03-14T10:07:46Z

This paper is devoted to the comparative evaluation of the two modulation
strategies developed for multilevel inverters control : the harmonic elimination
technique with voltage control (OHSW) and the optimal minimization of the total
harmonic distortion method (OMTHD), which are a very important and efficient
strategies of eliminating selected harmonics from spectrum of the output voltage or
minimizing its total harmonic distortion in order to improve its quality. First, we (...)

- Volume 01 issue 03 / Thd, Multilevel inverter (vsi), Cascade inverter, Harmonic elimination, Pulse width modulation (pwm)

Coupled Analytical-Finite Element Methods for Linear Electromagnetic Actuator Analysis.

Miraoui A., Rahem D., Srairi K., Srairi S. — 2011-03-14T10:00:55Z

In this paper, a linear electromagnetic actuator with moving parts is analyzed. The
movement is considered through the modification of boundary conditions only using
coupled analytical and finite element analysis. In order to evaluate the dynamic
performance of the device, the coupling between electric, magnetic and mechanical
phenomena is established. The displacement of the moving parts and the inductor
current are determined when the device is supplied by capacitor discharge (...)

- Volume 01 issue 03 / Actuators, Analytical analysis, Coupling model, Finite element method, Movement, Transient feeding

Dynamic Performance of an HVDC Link.

Fellah M. K., Hadjeri S., Zidi S.A. — 2011-03-14T09:48:10Z

This paper presents the results of a simulation study on a 12 pulse HVDC (High
Voltage Direct Current) using a system in Matlab/Simulink. The object of the
study is to investigate the steady state and dynamic performance of the system.
First we examine response of current regulator after change in current reference in
order to see the behavior of the controllers in controlling the desired current. Next,
we present the digital simulation of a test system and show the response to a DC (...)

- Volume 01 issue 03 / Hvdc, Recovery, Fault simulation, vdcol

Artificial Neural Network for Real Time Load Flow Calculation:Application to a Micro Grid with Wind Generators .

Francois B., Hadj Abdallah H., Krichen L. — 2011-03-14T09:35:01Z

This work presents a method for solving the problem of load flow in electric power
systems including a wind power station with asynchronous generators. For this type
of power station, the generated active power is only known and consequently the
absorbed reactive power must be determined. So we have used the circular diagram
at each iteration and by considering this node as a consuming node in the load flow
program. Since the wind speed is not constant, the generated power is neither (...)

- Volume 01 issue 03 / Artificial neural networks, Electrical supply networks, Load flow, Microgrid, Circular power diagram, Wind generator