Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
S_Th_C_Room4: Numerical Simulation Techniques for EMC Problems (III)
2:00pm - 3:20pm
Session Chair: Salvador Gonzalez Garcia
Shielding effectiveness assessement of a coaxial cable design with a combination of numerical and analytical solutions
Clement Pornin1, Tan Phu Vuong1, Gilbert Angenieux2, Pascal Xavier1
1Grenoble INP IMEP-LaHC, France; 2Universite Savoie-Mont Blanc, IMEP LaHC, France
This paper introduces a novel approach to assess the shielding effectiveness of coaxial cables design by combining the numerical electromagnetic modeling and an analytical solution. A simplified numerical 3D model is built with the software CST microwaves. The 3D model is limited by the complexity of the braided structure of the coaxial cable's shield. Hence, in this model, the woven structure of the braided shield is simplified by using nonwoven crossed strands. The effect of the weaving is added separately using an analytical solution. A comparison between measurement results extracted from literature, raw results of simulation and simulation results corrected with analytical formula is given. Finally the relevance of the presented method is discussed.
Electromagnetic Pulse Propagation over Large Area Simulation through Massively Parallel Adaptive Mesh Refinement FDTD
Hanyu Li1, Xianfeng Bao2, Haijing Zhou1
1Institute of Applied Pysics and Computational Mathematics, China, People's Republic of; 2Software Center for High Performance Numerical Simulation, CAEP
FDTD method is an effective approach for electromagnetic pulse (EMP) problems simulation. However, simulating EMP propagating over large area with conventional FDTD is not applicable, even with the state-of-art super-computers due to the numerous computations required. In this paper, an FDTD method with multi-level parallel computation techniques and adaptive mesh refinement (AMR) strategy is proposed to solve EMP propagation over a large area. Numerical example shows the computation time decrease down to 20% while preserving excellent precision. The parallel AMR FDTD method is capable of simulating EMP propagation in city as shown in the example.
Recent Advances to the Feko Integrated Cable Harness Modeling Tool
Marlize Schoeman1, Elia A. Attardo2, Jordi Soler-Castany3
1Altair Development SA (Pty) Ltd; 2Altair Engineering GmbH; 3Altair Engineering Inc
This paper describes the latest cable modeling improvements added to the electromagnetic field solver Feko. Covered topics include relaxing the high frequency cable-to- installation height restriction; extending the options to model a cable shield through direct modeling of a double shield and adding single-layered braided shield formulas by Tyni and Demoulin; hybridisation of the finite difference time domain (FDTD) solver with an irradiating cable solution; optimisation of time critical cable solver phases.
A Simplified Modeling Of Transient Electromagnetic Coupling In Air Insulation Substation
To study the problem of electromagnetic coupling in the power transmission network by modeling, generally the theory of Multiconductor Transmission Line (MTLs) is adopted. The formalism proposed in the literature is now well known, realized in two steps, calculation of the emitted electromagnetic field and then the resolution of the coupling equations of the MTLs. In this work, we propose a realistic time domain approach that directly treats the electromagnetic coupling in air insulation substation in one step and without having to calculate the electromagnetic wave emitted by the lines and bus bar. To achieve this we use the topological electromagnetic formalism and we consider simultaneously the transmitter (line and busbar) and the receiver (control cable) in the same mathematical equation. To validate our work, we propose an application where we consider an operation of a closing a circuit breaker inside substation