By Yoshihiro Baba, Vladimir A. Rakov
"Presents present study into electromagnetic computation theories with specific emphasis on Finite-Difference Time-Domain procedure This e-book is the 1st to consolidate present learn and to ascertain the theories of electromagnetic computation tools with regards to lightning surge security. The authors introduce and evaluate current electromagnetic computation equipment reminiscent of the strategy of moments (MOM), the partial aspect an identical circuit (PEEC), the finite aspect technique (FEM), the transmission-line modeling (TLM) approach, and the finite-difference time-domain (FDTD) technique. the applying of FDTD solution to lightning security experiences is a subject that has matured via many functional functions long ago decade, and the authors clarify the derivation of Maxwell's equations required through the FDTD, and modeling of assorted electric parts wanted in computing lightning electromagnetic fields and surges with the FDTD approach. The e-book describes the appliance of FDTD approach to present and rising difficulties of lightning surge safeguard of constantly extra advanced installations, fairly in serious infrastructures of strength and knowledge, resembling overhead energy strains, air-insulated sub-stations, wind turbine generator towers and telecommunication towers. either authors are the world over famous specialists within the region of lightning research and this is often the 1st publication to provide present examine in lightning surge safeguard Examines intimately why lightning surges happen and what could be performed to guard opposed to them comprises theories of electromagnetic computation equipment and lots of examples in their program followed via a pattern published software in response to the finite-difference time-domain (FDTD) process written in C++ software "-- Read more...
Presents present learn into electromagnetic computation theories with specific emphasis on Finite-Difference Time-Domain process
This e-book is the 1st to consolidate present examine and to envision the theories of electromagnetic computation tools when it comes to lightning surge protection.
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Additional resources for Electromagnetic computation methods for lightning surge protection studies
The ICC can be viewed as a continuation of the UPL when the latter has reached the main negative charge region in the cloud. At that time, the upper extremity of the UPL is likely to become heavily branched. The UPL and ICC constitute the initial stage of a classical triggered-lightning discharge. After cessation of the ICC, one or more dart-leader–return-stroke sequences may traverse the same path to the triggering facility. The dart leaders and the following return strokes in triggered lightning are similar to dartleader–return-stroke sequences in natural lightning, although the initial processes in natural downward lightning and in triggered lightning are distinctly different.
21 Conceptual pictures of axial electric fields around horizontal and vertical wires above flat, perfectly conducting ground. where L is the inductance of the wire per unit length, C is the capacitance (to ground) per unit length, μ0 is the permeability of air, and ε0 is the permittivity of air. 02 m. The reason why the electric potential and characteristic impedance are defined for a long horizontal wire such as a ground wire and a phase conductor is that the electromagnetic field structure around the horizontal wire is transverse electromagnetic (TEM), in that no axial electric field exists.
4. It is based on a simple procedure, and therefore its computer programming is relatively easy. It is capable of treating complex geometries and inhomogeneities. It is capable of incorporating nonlinear effects and components. It can handle wideband quantities from one run with a time-to-frequency transforming tool. Its disadvantages are: 1. It is computationally expensive compared to other methods such as the method of moments (MoM). Electromagnetic Computation Methods for Lightning Surge Protection Studies, First Edition.