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Please note that all times are shown in the time zone of the conference. The current conference time is: 29th June 2025, 01:25:01am CEST
This paper introduces an innovative approach to electromagnetic modeling based on the Partial Element Equivalent Circuit (PEEC) method, including an analytical integration of the coupling coefficients. A novel surface-based formalism, termed Surface-PEEC (S-PEEC), is proposed to enhance computational efficiency and accuracy. The theoretical foundations of this method are detailed, highlighting its formulation and implementation. To demonstrate the versatility of the numerical model, various configurations are explored, including different material properties, positional arrangements, and computational domains. The results illustrate the adaptability and effectiveness of the S-PEEC approach in modeling possible aircraft lighning-strike scenarios.
Validation of an EMT Model for Surge Protective Devices Against Triggered Lightning Field Data
Thomas Tsovilis1, Alexandros Y. Hadjicostas1, Georgios D. Peppas2, Yijun Zhang3, Shaodong Chen4
1Aristotle University of Thessaloniki, Greece; 2Technical University of Crete, Greece; 3Fudan University, China; 4Institute of Tropical and Marine Meteorology, China
This work presents a comparison between field observations of the transient response of a surge protective device (SPD) and predictions of a developed equivalent circuit model employed in Electromagnetic Transient (EMT) simulations. Field data obtained from a triggered lightning event at the Field Experiment Base on Lightning Sciences of the China Meteorological Administration serve as the basis for evaluating the developed EMT model for the SPD under study. Analysis of simulation results shows an excellent agreement with field records on residual voltage and energy absorption of SPD under non-standard surge current flow. This study provides insights into methodology of modeling the nonlinear performance of SPDs via advanced EMT simulations, constituting a promising framework to enhance the design of surge protection systems for vulnerable distribution power systems and emerging smart grids.
Experimental Investigation of the 8/20 μs Impulse Current Level that Causes Transient Voltage Suppressor Diodes to Fail
Niki Gkonou1, George Peppas2, Evangelos Petrou1, Thomas Tsovilis1
1Aristotle University of Thessaloniki, Greece; 2Technical University of Crete
The surge current withstand capability of transient voltage suppression diodes is experimentally investigated. With the aid of a combination wave generator, we apply a sequence of 8/20 μs impulse currents with increasing peak with steps of 20 - 30 A to determine the surge current level that leads to failure mode the bidirectional diodes under study. Experimental results are analyzed and discussed in the context of power dissipation under surge events and potential leakage current changes under operating conditions.
Time Domain Modeling of Lightning Induced Disturbances in a Buried Shielded Cable
Nekhoul Bachir, Chikeur Hadjer
University of Jijel, Algeria
To model the problem of electromagnetic lightning transients in buried shielded cables, classical transmision line theory (CTL) is the most used in the literature. CTL uses the Pollazeck concept and consists of ignoring the earth ground admittance, therefore neglecting the displacement currents in the ground which can become significant when the frequency increases. To deal with this problem, in this work we propose a modeling which uses the extended transmission line theory (ETL) and allows us to consider the earth return admittance. The proposed model is developed directly in the time domain and considers the dependence with frequency of the parameters per unit length of the cable and the electrical characteristics of the ground. We compare our calculation results to those produced by measurement and to those obtained by other modeling.
