“…First, when modelling of line fault characteristics, different fault distribution on the power line can lead to various estimation results. The published literature works use the specific probability density function to simulate the fault distribution on transmission lines, such as normal density function [7] or uniform density function [8]. However, this hypothesis cannot describe the randomness of fault distribution fully and accurately, due to the occurrence of fault (short-circuit) on the power line is affected by environment condition, usage life and other uncertainty factors.…”
“…First, when modelling of line fault characteristics, different fault distribution on the power line can lead to various estimation results. The published literature works use the specific probability density function to simulate the fault distribution on transmission lines, such as normal density function [7] or uniform density function [8]. However, this hypothesis cannot describe the randomness of fault distribution fully and accurately, due to the occurrence of fault (short-circuit) on the power line is affected by environment condition, usage life and other uncertainty factors.…”
“…Em [6], apresenta-se uma ferramenta computacional para determinar os ajustes de todos os dispositivos de proteção em RD. Na referência [7] utiliza-se o ATP para modelagem de uma RD para avaliar o desempenho da rede considerando a natureza aleatória das faltas. Em [8], os autores apresentam dois algoritmos baseado em componentes simétricos da corrente de sequências zero, positivo e negativo, para proteção de relé de sobrecorrente direcional (do inglês Directional Overcurrent Relays -DOCR) na rede primária do alimentador com Geração Distribuída (GD) e em [9] apresenta-se um novo método para coordenar o relé DOCR instalado em uma RD em malha utilizando algoritmos evolutivos e programação linear.…”
Abstract⎯ This article presents the modeling and simulation in the ATP (Alternative Transients Program)/MODELS of devices used in overcurrent protection of distribution networks such as reclosers , sectionalisers , fuses , digital relays and current transformers. A radial feeder with 63 buses was used in the study case. Numerous tests of short -circuits involving singlephase, two phases and three phases at various points of the feeder, were performed, with the purpose of validating the developed models and check the performance of the protection system. The results show the advantages of this type of modeling through which it is possible to evaluate the behavior of the power system against the operation of the protection and the protection front to diverse operating situations to which it is subjected. This study may contribute to the solution of problems of adjustment, coordination and analysis of the behavior of the distribution network using it for more elaborate models of power system components that are available in the ATP software.
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