scholarly journals Modeling geomagnetically induced currents in the South African power transmission network using the finite element method

Space Weather ◽  
2015 ◽  
Vol 13 (3) ◽  
pp. 185-195 ◽  
Author(s):  
Electdom Matandirotya ◽  
Pierre J. Cilliers ◽  
Robert R. Van Zyl
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
South African ◽  
Power Transmission ◽  
Transmission Network ◽  
The Finite Element Method ◽  
The South ◽  
Geomagnetically Induced Currents ◽  
Induced Currents ◽  
Element Method

scholarly journals Utilization of the finite element method for the calculation and examination of underground power cable ampacity

2019 ◽  
Vol 8 (3) ◽  
pp. 257
Author(s):  
Mahmood Khalid Hadi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Power Transmission ◽  
Linear Interpolation ◽  
Distribution Model ◽  
Power Cable ◽  
The Finite Element Method ◽  
Regular Feature ◽  
Parameter Values ◽  
Element Method

Currently, the use of underground electric cables is a regular feature of present-day power transmission and distribution schemes. Issues related to economical limitations and the lack of adequate space led to the need for cables with an elevated current carrying capacity (ampacity). In order to achieve this objective, public services around the globe are focusing not only on better designs, but also on improving the level of precision in the context of cable parameter values. Precise parameter values are essential for ensuring that the replicated outcomes correspond sufficiently close to actual circumstances. While the conventional approach to ampacity calculation is through the IEC-60287 procedure, the numerical route is considered more specific and flexible. This endeavour harnesses the finite element method to conceive an innovative process for calculating the thermal field and ampacity of a cable. This process involves the crafting of a temperature field distribution model for scrutinizing temperature distribution in the region of an electric cable, and the deployment of the linear interpolation procedure for computing its ampacity. Subsequent to its formation, the model was put into operation on the underground cable 33KV XLPE.

scholarly journals Evaluating the applicability of the finite element method for modelling of geoelectric fields

2013 ◽  
Vol 31 (10) ◽  
pp. 1689-1698 ◽  
Author(s):  
B. Dong ◽  
D. W. Danskin ◽  
R. J. Pirjola ◽  
D. H. Boteler ◽  
Z. Z. Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electric Field ◽  
Power Systems ◽  
Electric Fields ◽  
Current Source ◽  
The Finite Element Method ◽  
Geomagnetically Induced Currents ◽  
The Earth ◽  
Element Method

Abstract. Geomagnetically induced currents in power systems are due to space weather events which create geomagnetic disturbances accompanied by electric fields at the surface of the Earth. The purpose of this paper is to evaluate the use of the finite element method (FEM) to calculate the magnetic and electric fields to which long transmission lines of power systems on the Earth are exposed. The well-known technique of FEM is used for the first time to simulate magnetic and electric fields applicable to power systems. Several test cases are modelled and compared with known solutions. It is shown that FEM is an effective modelling technique that can be applied to determine the electric fields which affect power systems. FEM enables an increased capability beyond the traditional methods for modelling electric and magnetic fields with layered earth conductivity structures, as spatially more complex structures can be considered using FEM. As an example results are presented for induction, due to a line current source, in adjacent regions with different layered conductivity structures. The results show the electric field away from the interface is the same as calculated for a single region; however near the interface the electric field is influenced by both regions.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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