Assessment of a frequency dependent soil model impact on lightning overvoltages
| Autor: | Maria Teresa Correia de Barros, Rodolfo A. R. Moura, Marco Aurélio O. Schroeder, Sandro de Castro Assis, Antonio C. S. Lima, Marcio Matias Afonso |
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| Rok vydání: | 2016 |
| Předmět: |
Engineering
Ground business.industry 020209 energy 020206 networking & telecommunications Insulator (electricity) 02 engineering and technology Mechanics Earthing system Overvoltage Frequency domain Ground-penetrating radar 0202 electrical engineering electronic engineering information engineering Electronic engineering RLC circuit business Overhead line |
| Zdroj: | 2016 33rd International Conference on Lightning Protection (ICLP). |
| DOI: | 10.1109/iclp.2016.7791468 |
| Popis: | A key aspect in the evaluation of the lightning performance of an overhead line is the tower grounding modeling approach. It affects the insulator string overvoltages and the ground potential rise (GPR). This work aims to assess the impact of the soil model i.e. using frequency independent and frequency dependent parameters. The developed grounding system model was implemented in the EMTP-ATP program. A RLC synthetized network is used instead of a constant lumped resistance. The RLC elements are derived from the rational approximation of the grounding system response obtained using a rigorous model based on the direct solution of Maxwell's equations in the frequency domain. An application example is presented, showing that the computed overvoltage is sensitive to the frequency dependence of the soil parameters. This effect is more pronounced for high resistivity soil. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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