Effect of temperature on galloping of iced conductors

Li, Guo; Li, Li

doi:10.1177/1369433217700423

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Photovoltaic cell dibuat dari material semikonduktor terutama silikon yang dilapisi oleh bahan tambahan khusus. Menurut [3] Mempertahankan sinar matahari jatuh ke sebuah permukaan panel PV secara tegak lurus akan mendapatkan energi maksimum ± 1000 W/m² atau 1 kW/m². Kalau tidak dapat mempertahankan ketegak lurusan antara sinar matahari dengan bidang PV, maka ekstra luasan bidang panel PV dibutuhkan (bidang panel PV terhadap sun altitude yang berubah setiap jam dalam sehari).…”

Section: Pendahuluanunclassified

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Pengujian Panel Surya 100 WP Skala Laboratorium

Siswanto¹

2021

ENT

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Energi listrik merupakan kebutuhan yang penting bagi kehidupan manusia, yang mencangkup hampir di semua aktivitas manusia menggunakan energi listrik. Kebutuhan akan sumber energi listrik semakin lama semakin meningkat seiring perkembangan zaman dan peningkatan kebututuhan ini harus diimbangi dengan penyediaan energi listrik yang memadai. Energi listirik sangat penting untuk diteliti sehingga nantinya memperoleh hasil yang optimal dalam menghasilkan energi baru sebagai penganti energi yang berasal dari fosil yang kurang ramah lingkungan. Penelitian ini membahas tentang pengaruh sudut kemiringan panel surya yang tepat untuk mendapatkan daya keluaran yang maksimum. Penelitian ini menempatkan panel surya dengan sudut kemiringan 15°, 30°, 45°, 60°. Dengan penelitian ini maka diperoleh daya yang optimal dengan sudut kemiringan 15° dengan tegangan rata-rata 16,0 volt, arus listrik rata-rata 1,35 Ampere dan Daya sebesar 21,80 watt. Untuk daya paling rendah didapat dengan sudut panel surya 45° dengan tegangan rata-rata 16,2 volt, arus listrik rata-rata sebesar 0,21 Ampere dan daya yang dihasilkan sebesar 3,55 watt.

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Section: Pendahuluanunclassified

“…Untuk 2 author : Dian dan Muis [2] Untuk 3 author atau lebih : Diki dkk [3] IV. KESIMPULAN Kesimpulan ini harus menjawab dari tujuan yang telah disampaikan dalam bagian sebelumnya.…”

Section: Ucapan Terima Kasihunclassified

Pengujian Panel Surya 100 WP Skala Laboratorium

Siswanto¹

2021

ENT

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“…This shows that wind load is the main cause of transmission line damage. (Tian et al, 2020; Li et al, 2018)…”

Section: Introductionmentioning

confidence: 99%

“…This shows that wind load is the main cause of transmission line damage. (Tian et al, 2020;Li et al, 2018) Den Hartog (1932) described the vertical excitation mechanism of the single-degree-of-freedom (1-DOF) transmission line galloping. Buchan, 1981a, 1981b) presented static and dynamic experiments according to the actual galloping icing model in the wind tunnel, which showed that the torsional self-excited vibration of overhead lines would be caused by torsional instability.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic analysis of galloping of a single iced conductor with four degrees of freedom based on curved beam theory

Yan

Zhang

et al. 2022

Advances in Structural Engineering

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Based on the nonlinear strain-displacement relationship of spatial curved beam theory, a finite element model for galloping analysis of iced transmission lines is established, which involves three translational degrees of freedom (DOF) and one rotational degree of freedom for each node. Considering the aerodynamic nonlinearity and the geometric nonlinearity of large amplitude motions of the iced transmission line, the nonlinear dynamic finite element equation is presented by using the virtual work principle. The equation is transformed into the sub-space according to the mode superposition method and a time integration algorithm is also performed in the sub-space. Then, the element independence and modal convergence are researched. Finally, the influence of aerodynamic forces on structural frequency is analyzed. The numerical results show that aerodynamic forces will greatly affect the torsional frequency of the transmission line, which accurately reflects the dynamic characteristics of transmission lines. Furthermore, the galloping calculation of the transmission line has reliable accuracy by using 4-DOF (per node) elements for the iced conductor. On the other hand, the model can predict the actual galloping response of the transmission line, which is convenient for the implementation of subsequent control design.

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“…Many scholars have conducted a lot of research [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] on galloping of the iced bundle conductors transmission lines. On the basis of ignoring the difference of aerodynamic characteristics for all subconductors, Zhang et al [5] simplified the bundle conductor as a single conductor to analyze the galloping characteristics.…”

Section: Introductionmentioning

confidence: 99%

Study on Galloping Oscillation of Iced Twin Bundle Conductors considering the Effects of Variation of Aerodynamic and Electromagnetic Forces

Wu¹,

Ye²,

Zhang³

et al. 2020

Shock and Vibration

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Due to the occurrence of whole-span and subspan vibration at the same time during the galloping of the iced bundle conductors, the distance between the subconductors changes, resulting in the variation of the aerodynamic parameters for the leeward subconductors. The existing conventional studies usually only consider the whole-span galloping, ignoring the relative motion and the electromagnetic force between the subconductors. Based on considering the above two factors at the same time, a new numerical simulation method to study the galloping behaviors of the iced conductors is presented. Then, the galloping behaviors of the iced twin bundle conductors’ transmission line with different current intensity, initial wind attack angle, and spacer layout are studied. The galloping oscillation behaviors include time histories of vibration displacements, mode, amplitude, frequency, motion traces, and the distance between two subconductors. The simulation results showed that the whole-span and subspan vibration appear at the same time during galloping oscillation and two subconductors may collide with each other when affected by the varying electromagnetic and aerodynamic forces. The effects of varying electromagnetic and aerodynamic forces on galloping behavior cannot be ignored. The new method presented in this work can contribute to the galloping study of the iced bundle conductors.

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Effect of temperature on galloping of iced conductors

Cited by 4 publications

References 25 publications

Pengujian Panel Surya 100 WP Skala Laboratorium

Pengujian Panel Surya 100 WP Skala Laboratorium

Nonlinear dynamic analysis of galloping of a single iced conductor with four degrees of freedom based on curved beam theory

Study on Galloping Oscillation of Iced Twin Bundle Conductors considering the Effects of Variation of Aerodynamic and Electromagnetic Forces

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