RELIABILITAS STRUKTUR MENARA JARINGAN TRANSMISI TERHADAP PROBABILITAS BEBAN AKIBAT ARUS

SITOMPUL, SANG TOGA (2022) RELIABILITAS STRUKTUR MENARA JARINGAN TRANSMISI TERHADAP PROBABILITAS BEBAN AKIBAT ARUS. S2 thesis, Universitas Mercu Buana Jakarta.

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Abstract

Transmission towers are the main part of the transmission line infrastructure system which can collapse due to various things, including the incorrect determination of loads such as the load due to the distribution of electric current. Load events due to current cannot be defined deterministically due to the uncertainty of consumers electricity usage, so further research is needed with a probabilistic approach. This study aims to identify the factors that affect the current distribution, review the statistical behavior of these factors and analyze the reliability of the tower structure with possible current loads. This study analyzes the reliability of the tower structure by analyzing the current first. Current data is needed to calculate the temperature that occurs in the conductor, temperature affects the expansion of the conductor so that there is a change in the conductor tension. The monte carlo simulation is applied to the conductor tension data. Random variables of conductor tension are generated and simulated on the tower structure. The failure criteria is determined as the limit of the reliability of the structure. The data for the bar stresses is distributed data so that a distribution curve can be formed. Conductors have material characteristics that affect the current so that there is a change in the conductor tension. Based on the results of the structural reliability analysis, the probability of structural failure is 2% and the reliability of the structure is 98%. This research is expected to be an input for standards in Indonesia in the procedure for assessing the security of transmission network tower structures. Keywords: transmission line, failure criteria, monte carlo, probability of failure, reliability of structure Menara transmisi merupakan bagian utama sistem infrastruktur jaringan transmisi yang dapat runtuh oleh berbagai hal, antara lain tidak tepatnya penentuan beban seperti beban akibat distribusi arus listrik. Peristiwa beban akibat arus tidak dapat didefinisikan secara deterministik karena ketidaktentuan penggunaan listrik dari konsumen sehingga perlu dilakukan penelitian lebih lanjut dengan pendekatan probabilistik. Penelitian bertujuan untuk mengidentifikasi faktor pengaruh akibat distribusi arus, meninjau perilaku statistik dari faktor tersebut dan melakukan analisa keandalan struktur menara dengan probabilitas beban akibat arus. Penelitian ini melakukan analisa keandalan struktur menara dengan meninjau arus terlebih dahulu. Data arus diperlukan untuk menghitung suhu yang terjadi pada konduktor, suhu mempengaruhi pemuaian pada konduktor sehingga terjadi perubahan pada gaya tarik konduktor. Simulasi monte carlo diterapkan pada data gaya tarik konduktor. Variabel acak dari gaya tarik konduktor dibangkitkan dan disimulasikan pada struktur menara. Kriteria keruntuhan ditentukan sebagai batas keandalan struktur. Data tegangan batang dilakukan distribusi data sehingga dapat dibentuk kurva distribusi. Konduktor memiliki karakteristik material yang berpengaruh terhadap arus sehingga terjadi perubahan pada gaya tarik konduktor. Berdasarkan hasil analisa keandalan struktur didapatkan probabilitas kegagalan struktur sebesar 2% dan keandalan struktur sebesar 98%. Penelitian ini diharapkan dapat menjadi masukan terhadap standar di Indonesia dalam prosedur penilaian keamanan struktur menara jaringan transmisi. Kata kunci: menara jaringan transmisi, kriteria kegagalan, monte carlo, probabilitas kegagalan, keandalan struktur

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