Loading...
Publication
Coordenação da cadeia de isoladores de uma linha de transmissão a ser instalada na região Nordeste do Brasil
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 5.09 MB | Adobe PDF |
Authors
Abstract(s)
Os isoladores de cadeia desempenham um papel crucial na transmissão de eletricidade,
especialmente em linhas de média, alta e muito alta tensão. Estes componentes são
responsáveis por suportar as linhas condutoras e garantir simultaneamente que a eletricidade
flua de forma segura, evitando curtos-circuitos e perdas de energia.
Os isoladores de cadeia protegem, igualmente, os componentes da rede elétrica contra a
humidade, poeira, poluição e outros fatores ambientais, aumentando assim a confiabilidade e
a durabilidade das infraestruturas elétricas. A sua utilização é, pois, fundamental para garantir
a segurança e a eficiência na distribuição e transmissão de energia elétrica, prevenindo
acidentes e interrupções no serviço.
Esta dissertação tem como objetivo principal analisar os fatores que impactam no projeto da
cadeia de isoladores para uma linha de transmissão de alta tensão destinada a escoar a geração
de energia elétrica da região Nordeste do Brasil e identificar a metodologia para o seu correto
dimensionamento de forma a garantir a confiabilidade necessária para uma infraestrutura de
tamanha importância. A relevância do tema se evidencia pela contínua expansão do sistema de
transmissão, que prevê a implementação de aproximadamente 37.454 km de novas linhas até
2030. Deste total, cerca de 7.308 km estão projetados para a região Nordeste, a representar
um passo essencial para o escoamento da crescente geração de energia nessa região,
proveniente principalmente de energias eólica e solar fotovoltaica.
Diante dessa previsão, este estudo apresenta dados relevantes para a análise de viabilidade do
traçado de uma linha de transmissão (LT), além de considerar os impactos das características
estruturais e construtivas das cadeias de isoladores, bem como os aspetos geográficos do local
de instalação, sobre a frequência anual de desligamentos por cada 100 km de extensão da linha
devido a descargas atmosféricas. Esse índice é fundamental para avaliar a viabilidade e a
confiabilidade do projeto. Para isso, serão desenvolvidos os cálculos relevantes para o correto
dimensionamento da cadeia de isoladores, assim como a validação por meio do software Flash
1.6, no qual verificou-se os impactos das condições meteorológicas, da distância de isolamento
e do sistema de aterramento via simulações, nas quais foi possível perceber a influência
significativa do nível ceráunico, da distância de isolamento em arco da cadeia de isoladores e
da resistência do sistema de aterramento no número de desligamentos anuais.
Suspension insulators play a crucial role in electricity transmission, especially in medium, high, and extra-high voltage lines. These components are responsible for supporting the conductors while ensuring that electricity flows safely, preventing short circuits and energy losses. Suspension insulators also protect power grid components from humidity, dust, pollution, and other environmental factors, thereby increasing the reliability and durability of electrical infrastructure. Their use is therefore essential to ensure the safety and efficiency of power distribution and transmission, helping to prevent accidents and service interruptions. The main objective of this dissertation is to analyze the factors that influence the design of insulator strings for a high-voltage transmission line intended to transport electricity generated in the Northeast region of Brazil. Additionally, it aims to identify the appropriate methodology for correctly sizing the insulator strings to ensure the required reliability for infrastructure of such importance. The relevance of this topic is highlighted by the ongoing expansion of the transmission system, which is expected to incorporate approximately 37,454 km of new lines by 2030. Of this total, around 7,308 km are projected for the Northeast region, representing a key step in enabling the evacuation of the growing power generation in that region, primarily from wind and solar photovoltaic sources. Given this forecast, this study presents relevant data for analyzing the feasibility of a transmission line (TL) route, as well as considering the impacts of the structural and construction characteristics of the insulator strings and the geographic features of the installation site on the annual outage frequency per 100 km of line length due to lightning strikes. This index is fundamental for assessing the project's viability and reliability. To achieve this, the necessary calculations for the proper dimensioning of the insulator strings will be developed, along with validation through the Flash 1.6 software. Simulations conducted in the software revealed the impacts of weather conditions, insulation distance, and the grounding system, showing the significant influence of the isokeraunic level, the arc insulation distance of the insulator string, and the grounding system resistance on the annual number of outages.
Suspension insulators play a crucial role in electricity transmission, especially in medium, high, and extra-high voltage lines. These components are responsible for supporting the conductors while ensuring that electricity flows safely, preventing short circuits and energy losses. Suspension insulators also protect power grid components from humidity, dust, pollution, and other environmental factors, thereby increasing the reliability and durability of electrical infrastructure. Their use is therefore essential to ensure the safety and efficiency of power distribution and transmission, helping to prevent accidents and service interruptions. The main objective of this dissertation is to analyze the factors that influence the design of insulator strings for a high-voltage transmission line intended to transport electricity generated in the Northeast region of Brazil. Additionally, it aims to identify the appropriate methodology for correctly sizing the insulator strings to ensure the required reliability for infrastructure of such importance. The relevance of this topic is highlighted by the ongoing expansion of the transmission system, which is expected to incorporate approximately 37,454 km of new lines by 2030. Of this total, around 7,308 km are projected for the Northeast region, representing a key step in enabling the evacuation of the growing power generation in that region, primarily from wind and solar photovoltaic sources. Given this forecast, this study presents relevant data for analyzing the feasibility of a transmission line (TL) route, as well as considering the impacts of the structural and construction characteristics of the insulator strings and the geographic features of the installation site on the annual outage frequency per 100 km of line length due to lightning strikes. This index is fundamental for assessing the project's viability and reliability. To achieve this, the necessary calculations for the proper dimensioning of the insulator strings will be developed, along with validation through the Flash 1.6 software. Simulations conducted in the software revealed the impacts of weather conditions, insulation distance, and the grounding system, showing the significant influence of the isokeraunic level, the arc insulation distance of the insulator string, and the grounding system resistance on the annual number of outages.
Description
Keywords
String Insulator Lightning Strikes Outage Electrical Energy Creepage distance Transmission Line Cadeia de isoladores Descargas Atmosféricas Desligamento Energia Elétrica Distância de Isolamento Linha de Transmissão
Pedagogical Context
Citation
Publisher
CC License
Without CC licence