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WG C4.37 Electromagnetic Computation Methods for Lightning Surge Studies with Emphasis on the FDTD Method

Background :

Recently, electromagnetic computation methods (ECMs), which include the method of moments (MoM), the finite-element method (FEM), the partial-element equivalent-circuit (PEEC) method, the finite-difference time-domain (FDTD) method and so on, have been used frequently in analyzing lightning surges on electrical systems and related electromagnetic compatibility (EMC) issues. One of the advantages of ECMs, in comparison with circuit simulation methods, is that they allow a self-consistent full-wave solution for both the transient current distribution in a 3D conductor system and resultant electromagnetic fields. In Technical Brochure 543 (Guide for Numerical Electromagnetic Analysis Methods: Application to Surge Phenomena and Comparison with Circuit Theory-based Approach, June 2013), fundamental theories of representative ECMs are explained, and their typical applications are presented. Among ECMs, the FDTD method, which was first used in surge simulations in the early 2000s, is most frequently and successfully used. Interest in using the FDTD method still continues to grow, in part due to availability of commercial codes and increased computer capabilities. It is now in need of detailed study in a relevant CIGRE WG.

Scope :

The following issues will be studied by the working group: 1. Theory of the FDTD method 2. Advantages and possible disadvantages of the 2D- and 3-D FDTD method in comparison with other representative ECMs 3. Modeling techniques for lightning, thin wires, nonlinear components/phenomena, and so on 4. Other techniques, such as non-uniform gridding and sub-gridding, for applying the FDTD method to lightning surge and EMC simulations 5. Typical examples of applications: overhead transmission and distribution lines, power cables, substations, intelligent smart buildings, wind-turbine-generator towers, and others.

Convener: Y. Baba (Japan)

Progress Report 2014 (pptx, 145kB)

Progress Report 2015 (pptx, 142kB)

Progress Report 2016 (pptx, 142kB)