Finite-element simulation of a generator on load during and after a three-phase fault

1992 ◽  
Vol 7 (4) ◽  
pp. 787-793 ◽  
Author(s):  
J.P. Sturgess ◽  
M. Zhu ◽  
D.C. Macdonald
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Element Simulation ◽  
Three Phase

scholarly journals STACKED DELTA DESIGN OF THREE-PHASE PERMANENT-MAGNET FAULT CURRENT LIMITERS

2021 ◽  
Vol 18 (1) ◽  
pp. 26-35
Author(s):  
Mohamed ELADAWY ◽  
Ibrahim Metwally
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Finite Element Simulation ◽  
Voltage Drop ◽  
Dynamic Performance ◽  
Iron Core ◽  
Fault Current ◽  
Element Simulation ◽  
Three Phase ◽  
Realistic Representation

This paper proposes an improvement for the dynamic performance of presaturated stacked permanent magnet biased three-phase fault current limiter (PMFCL) through COMSOL finite element simulation. The nonlinear demagnetization behavior of the permanent magnet, especially in the upper part of the B-H curve with negative magnetic field intensity, has been modelled through the Jiles-Atherton method. This enables a realistic representation of the PMFCL dynamic behavior throughout its entire operations of pre-fault, fault and fault removal, respectively. The experimental measurements have been considered to validate the trends of the simulation outcomes during the entire operation of PMFCL. Extensive finite element simulation shows that the stacked design of PMFCL can increase the capability of fault current limiting with proper selection of the number and arrangement of the AC coils around the iron core (soft magnet). Results reveal that the division of AC coils into series differential connected subcoils, with an even number, can increase the limiting capability with increasing the AC coil number of turns, without exceeding the permissible tolerances of voltage drop and power losses. Moreover, this stacked design is subjected to parametric investigation for different fault types, either symmetrical or unsymmetrical, or even when changing the fault current peak value.

Design of Five-Phase Transformer through Finite Element Simulation

2015 ◽  
Vol 761 ◽  
pp. 12-16
Author(s):  
Kasrul Abdul Karim ◽  
Lim Geok Yin ◽  
Nor Azizah Mohd Yusoff ◽  
Md Nazri Othman ◽  
Auzani Jidin
Keyword(s):  
Finite Element ◽  
Finite Elements ◽  
Finite Element Simulation ◽  
Design Process ◽  
Phase Angle ◽  
Motor Drive ◽  
Diagram Method ◽  
Element Simulation ◽  
Three Phase ◽  
Simulation Results

The interests in multiphase (more than three) system are escalating recently especially in the motor drive applications. Thus, this paper introduces the graphical phasor diagram method in designing the multiphase transformer connection. The proposed method eases the design process of the static multiphase transformer that produces multiphase output from the standard three phase input. The transformer connection was simulated in ANSYS Maxwell and the multiphase waveform with appropriate phase angle was obtained. The design of five-phase transformer using graphical phasor and simulation results from the finite elements software are presented in this paper.

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