Numerical simulation of power circuits using transmission-line modelling

1990 ◽  
Vol 137 (6) ◽  
pp. 379-384 ◽  
Author(s):  
S.Y.R. Hui ◽  
C. Christopoulos
Keyword(s):  
Numerical Simulation ◽  
Transmission Line ◽  
Power Circuits

scholarly journals The implementation of the three-dimensional numerical simulation of the coaxial magnetically insulated transmission line with helical inductor

2012 ◽  
Vol 61 (16) ◽  
pp. 162901
Author(s):  
Liu La-Qun ◽  
Liu Da-Gang ◽  
Wang Xue-Qiong ◽  
Zou Wen-Kang ◽  
Yang Chao
Keyword(s):  
Numerical Simulation ◽  
Transmission Line ◽  
Three Dimensional

Experimental Simulation on Aerodynamic Character of D-Shaped Iced Conductor

2012 ◽  
Vol 614-615 ◽  
pp. 1405-1409
Author(s):  
Xin Min Li ◽  
Kuan Jun Zhu ◽  
Bin Liu
Keyword(s):  
Numerical Simulation ◽  
Wind Speed ◽  
Wind Tunnel ◽  
Transmission Line ◽  
Driving Force ◽  
Experimental Simulation ◽  
Key Factor ◽  
Simulation And Experiment ◽  
And Control

The dynamics force of iced-conductor is the driving force of galloping; its variation is depended on the aerodynamic character of iced conductor. The aerodynamic character of iced conductor is the key factor of galloping of iced-conductor, but the result of theoretically analysis and numerical simulation isn’t suited for the requirement of transmission line project. In the paper, basing on the theoretically analysis and numerical simulation, the simulation tests in wind tunnel of D-shaped iced conductor is stetted up and put into practice under different wind speed and iced thickness, and then the systemic study is carried into execution. The result of research is indicated that there is a better coherence between the numerical simulation and experiment test, and the variation rules of parameters is obvious with the different iced thickness, the result of numerical simulation is the beneficial supplement to the experiment test. The result can not only provide the original date for the galloping analysis, but also validate the affectivity of numerical simulation, support the research of mechanism and control of galloping.

scholarly journals A numerical simulation of Earth's electromagnetic cavity with the Transmission Line Matrix method: Schumann resonances

2003 ◽  
Vol 108 (A5) ◽  
Author(s):  
Juan A. Morente ◽  
Gregorio J. Molina-Cuberos ◽  
Jorge A. Portí ◽  
Bruno P. Besser ◽  
Alfonso Salinas ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Transmission Line ◽  
Matrix Method ◽  
Transmission Line Matrix ◽  
Schumann Resonances

Research on Rib Stiffener Distribution and Ultimate Strength of Steel Tubular Tower’s K-Joint

2014 ◽  
Vol 1078 ◽  
pp. 166-170
Author(s):  
Xiao Guang Hu ◽  
Jing Bo Yang ◽  
Mao Hua Li
Keyword(s):  
Numerical Simulation ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Transmission Line ◽  
Ultimate Strength ◽  
Maximum Stress ◽  
Power Transmission ◽  
Steel Structures ◽  
Power Transmission Line ◽  
Joint Structure

The method of calculating K-joint’s ultimate strength given by “Code for design of steel structures” GB 50017-2003 requires that, the angle θ between K-joint’s chord and brace is no less than 30°. While, due to the request of electric gap or transmission line corridor, the angle of steel tubular tower’ K-joint in power transmission line have to be designed less than 30° sometimes. In order to solve the engineer problem, rib stiffener were usually added to K-joint structure. 3 kinds of new rib stiffener to directly-welded K-joint of steel tubular tower were designed, and numerical simulation was made to study the structures’ performance under load and ultimate bearing capacity. With new-designed rib stiffener, K-joint’s stress distribution in weld jointing area, where usually bear stress badly, is improved obviously. Stress concentration is eliminated, and maximum stress is lowered. It is suggested that, in the case of exceeding code’s suggest range, k-joint structure must be reinforced to increase intensity, and the 3 format of rib stiffeners can improve the structure’s stress distribution and ensure the security of the structure.

Nonlinear Numerical Simulation of Iced Conductor Galloping

2010 ◽  
Vol 44-47 ◽  
pp. 2676-2680
Author(s):  
Li Li ◽  
Zi Dong Hu ◽  
Zhi Yuan Cheng ◽  
Wei Jiang
Keyword(s):  
Numerical Simulation ◽  
Transmission Line ◽  
Fluid Dynamic ◽  
Element Model ◽  
Aerodynamic Coefficient ◽  
Lagrange Formulation ◽  
Runge Kutta Method ◽  
Geometrical Nonlinear ◽  
Nonlinear Numerical Simulation ◽  
The Finite Element Model

A two-node cable element which the axial torsion and geometrical nonlinear were considered was developed based on the update Lagrange formulation, and a model of multi-span transmission line for galloping analysis was established. A nonlinear numerical simulation of single iced conductor galloping was proposed. Using computational fluid dynamic, the aerodynamic coefficient of iced conductor with different wind attack angle was simulated. According to the finite element model of multi-span transmission line and aerodynamic coefficient curve, the galloping of iced conductor through the method of fourth-ordered Runge-Kutta method was presented. By the comparison with the classical examples, the results indicated that the presented method are efficient and reliable.

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