A comprehensive analysis of the effect of frequency-dependent soil electrical parameters on the lightning response of wind-turbine grounding systems

Alípio, Rafael; Conceição, Daiane Leal da; Conti, Alberto De; Yamamoto, Kazuo; Dias, Rosilene N.; Visacro, Silvério

doi:10.1016/j.epsr.2019.105927

Cited by 28 publications

(10 citation statements)

References 19 publications

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“…Later, in the 1970s, several authors developed theoretical and experimental models based on field experiments as summarized in [5,16]. Recently, in the electromagnetic software tools that solve the frequency-domain Maxwell's equations include the frequency dependence of soil electrical parameters to carry out the lightning performance on grounding systems and on transmission lines such as in [22,[37][38][39]43].…”

Section: Frequency-dependent Soil Electrical Parametersmentioning

confidence: 99%

“…Lightning is one of the primary sources of outages in electrical power systems due to the back flashover mechanism and other insulation failures that can occur in several pieces of equipment [34]. In this context, lately, several authors had worked on the lightning performance of overhead multiphase transmission lines [22,44,45], wind turbines [43,46] and renewable-based hybrid systems [47,48].…”

Section: Lightning Modelingmentioning

confidence: 99%

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Transient Analysis of Multiphase Transmission Lines Located above Frequency-Dependent Soils

et al. 2021

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This paper evaluates the influence of frequency-dependent soil conductivity and permittivity in the transient responses of single- and double-circuit transmission lines including the ground wires subjected to lightning strikes. We use Nakagawa’s approach to compute the ground-return impedance and admittance matrices where the frequency-dependent soil is modeled using Alípio and Visacro’s model. We compare some elements of these matrices with those calculated by Carson’s approach which assumes the frequency constant. Results show that a significant difference can be obtained in high resistive soils for these elements in impedance and admittance matrices. Then, we compute the transient responses for single- and double-circuit lines with ground wires located above soils of 500, 1000, 5000, and 10,000 Ω·m considering the frequency constant and frequency-dependent parameters generated for two lightning strikes (subsequent stroke and Gaussian pulse). We demonstrate that the inclusion of frequency dependence of soil results in an expressive reduction of approximately 26.15% and 42.75% in the generated voltage peaks in single- and double-circuit lines located above a high-resistive soil. These results show the impact of the frequency-dependent soils that must be considered for a precise transient analysis in power systems.

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Section: Frequency-dependent Soil Electrical Parametersmentioning

confidence: 99%

Section: Lightning Modelingmentioning

confidence: 99%

Transient Analysis of Multiphase Transmission Lines Located above Frequency-Dependent Soils

et al. 2021

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“…Para simulação do comportamento transitório do sistema de aterramento em questão, utiliza-se o Modelo Eletromagnético Híbrido (HEM do inglês Hybrid Electromagnetic Model), baseado na teoria de campo e cujos detalhes podem ser encontrados em (Visacro and Soares, 2005). Esse modelo foi recentemente validado para simulação de transitórios em aterramentos típicos de aerogeradores, considerando a comparação com resultados experimentais (Alipio et al, 2019). Em síntese, considera-se a abordagem de fio fino, discretiza-se o sistema de aterramento em diversos elementos e determina-se o acoplamento eletromagnético entre eles de forma rigorosa empregando-se os potenciais vetor magnético e escalar elétrico.…”

Section: Modelagem Eletromagnética Do Sistema De Aterramentounclassified

“…Isso ocorre para esse caso específico em função do elevadíssimo valor de resistividade, o que implica uma baixa atenuação das ondas que se propagam no eletrodo de interligação. Adicionalmente, segundo (Alipio et al, 2019), para valores muito elevados de resistividade e arranjos de aterramento típicos de turbinas eólicas, o efeito capacitivo é pronunciado, o que leva a curva de GPR atingir o pico em instantes de tempo maiores; assim, o efeito do aterramento vizinho alcança a torre atingida pela descarga antes que o GPR tenha atingido seu valor máximo.…”

Section: (ω )unclassified

Análise do Desempenho de Aterramentos Elétricos Interligados de Parques Eólicos frente a Descargas Atmosféricas: uma Avaliação Considerando Condições Típicas Brasileiras

Alípio

Barros

Passos

et al. 2020

Anais Do Simpósio Brasileiro De Sistemas Elétricos 2020

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Este trabalho investiga o comportamento impulsivo de sistemas de aterramentos interligados de parques eólicos, considerando condições típicas brasileiras. São considerados diferentes comprimentos de eletrodo que interligam os aterramentos de aerogeradores vizinhos, bem como uma ampla faixa de valores de resistividade do solo. De acordo com os resultados, a interligação entre os aterramentos de aerogeradores adjacentes pode levar a uma melhoria do desempenho impulsivo, com redução do valor de pico da elevação de potencial desenvolvida em resposta à injeção da corrente de descarga. A redução relativa do pico da elevação de potencial torna-se mais significativa com o aumento da resistividade do solo e é mais pronunciada para correntes mais lentas. Em todos os casos, a interligação leva a uma redução expressiva da resistência de aterramento vista por cada aerogerador individualmente.

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“…The height of WTs and their location, often in mountainous regions, makes them very exposed to the lightning hazard [2], [3]. Tall WTs attract downward flashes, but they initiate an appreciable number of upward flashes as well [4].…”

Section: Introductionmentioning

confidence: 99%

Do Wind Turbines Amplify the Effects of Lightning Strikes? A Full-Maxwell Modelling Approach

Torchio

Nicora

Mestriner

et al. 2022

IEEE Trans. Power Delivery

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Wind turbines (WTs) can be seriously damaged by lightning strikes and they can be struck by a significant number of flashes. This should be taken into account when the WT lightning protection system is designed. Moreover, WTs represent a path for the lightning current that can modify the well-known effects of the lightning discharge in terms of radiated electromagnetic fields, which are a source of damage and interference for nearby structures and systems. In this paper, a WT struck by a lightning discharge is analyzed with a full-wave modelling approach, taking into account the details of the WT and its interactions with the lightning channel. The effects of first and subsequent return strokes are analyzed as well as that of the rotation angle of the struck blade. Results show that the lightning current along the WT is mainly affected by the ground reflection and by the reflection between the struck blade and the channel. The computed electromagnetic fields show that, for subsequent return strokes, the presence of a WT almost doubles their magnitude with respect to a lightning striking the ground. Such enhancement is emphasized when the inclined struck blade is considered.

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A comprehensive analysis of the effect of frequency-dependent soil electrical parameters on the lightning response of wind-turbine grounding systems

Cited by 28 publications

References 19 publications

Transient Analysis of Multiphase Transmission Lines Located above Frequency-Dependent Soils

Transient Analysis of Multiphase Transmission Lines Located above Frequency-Dependent Soils

Análise do Desempenho de Aterramentos Elétricos Interligados de Parques Eólicos frente a Descargas Atmosféricas: uma Avaliação Considerando Condições Típicas Brasileiras

Do Wind Turbines Amplify the Effects of Lightning Strikes? A Full-Maxwell Modelling Approach

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