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Numerical model of cascade failure of transmission lines under downbursts
https://orcid.org/0000-0002-3419-6174
Highlights A numerical model is developed to study the cascaded failure of transmission lines under downbursts. An extensible catenary approach is utilized to predict the tension forces developed in the conductors. The post failure geometry of the towers within the line is predicted. A segment of an existing transmission line is considered as a case study.
Abstract Transmission line’s cascades have played a major role in several serious accidents around the world, as they are particularly prone to occurring in the presence of strong winds. The failure of a line component overloads the system, inducing a progressive failure that can involve many transmission line (TL) supports. Due to their localized nature, downbursts, in particular, cause unequal wind forces on various towers of a transmission line; the collapse of one tower can affect the adjacent towers through the unbalanced forces that develop in the conductors, which can lead to a cascaded-type of failure along the entire line. In this study, a numerical model is developed in-house to predict this type of line failure. A major challenge in this numerical model is the prediction of the geometric configuration of the tower and of the conductor forces after the tower collapses. Details of this unique numerical model are presented in this paper along with a case study for illustration.
Numerical model of cascade failure of transmission lines under downbursts
https://orcid.org/0000-0002-3419-6174
Highlights A numerical model is developed to study the cascaded failure of transmission lines under downbursts. An extensible catenary approach is utilized to predict the tension forces developed in the conductors. The post failure geometry of the towers within the line is predicted. A segment of an existing transmission line is considered as a case study.
Abstract Transmission line’s cascades have played a major role in several serious accidents around the world, as they are particularly prone to occurring in the presence of strong winds. The failure of a line component overloads the system, inducing a progressive failure that can involve many transmission line (TL) supports. Due to their localized nature, downbursts, in particular, cause unequal wind forces on various towers of a transmission line; the collapse of one tower can affect the adjacent towers through the unbalanced forces that develop in the conductors, which can lead to a cascaded-type of failure along the entire line. In this study, a numerical model is developed in-house to predict this type of line failure. A major challenge in this numerical model is the prediction of the geometric configuration of the tower and of the conductor forces after the tower collapses. Details of this unique numerical model are presented in this paper along with a case study for illustration.
Numerical model of cascade failure of transmission lines under downbursts
https://orcid.org/0000-0002-3419-6174
Highlights A numerical model is developed to study the cascaded failure of transmission lines under downbursts. An extensible catenary approach is utilized to predict the tension forces developed in the conductors. The post failure geometry of the towers within the line is predicted. A segment of an existing transmission line is considered as a case study.
Abstract Transmission line’s cascades have played a major role in several serious accidents around the world, as they are particularly prone to occurring in the presence of strong winds. The failure of a line component overloads the system, inducing a progressive failure that can involve many transmission line (TL) supports. Due to their localized nature, downbursts, in particular, cause unequal wind forces on various towers of a transmission line; the collapse of one tower can affect the adjacent towers through the unbalanced forces that develop in the conductors, which can lead to a cascaded-type of failure along the entire line. In this study, a numerical model is developed in-house to predict this type of line failure. A major challenge in this numerical model is the prediction of the geometric configuration of the tower and of the conductor forces after the tower collapses. Details of this unique numerical model are presented in this paper along with a case study for illustration.
Numerical model of cascade failure of transmission lines under downbursts
Shehata, Ahmed (author) / EL Damatty, Ashraf (author)
Engineering Structures ; 255
2022-01-09
Article (Journal)
Electronic Resource
English
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