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Proposal of Analysis Method to Reduce Back-Flashover Rate Taking Account of Tower Footing Resistance

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The number of lightning stroke on the tower of the 150 kV Koto Panjang-Payakumbuh transmission line located the rocky area has been observed. The high value of tower footing resistance indicates the occurrence of the back-flashover in the transmission line at intensity of 74%. The back-flashover occurrence is dominantly triggered by the tower footing resistance value. Also, the rate of back-flashover has an effect on the value of the tower footing resistance by considering the number of electrode installations. A design is proposed for the grounding system of the tower footings in order to reduce the rate of back-flashover. The results presenting in numerical simulation indicates that it works properly after adding 4 electrodes. That is to say, installing 4 electrodes in each tower has successfully decreased the tower footing resistance value, back-flashovers rate 80% and 90-95% of present value respectively. The insulator voltage can be reduced to less than half of the present voltages as much as 30-50%. In more detail, in tower 77, the value of the tower footing resistance drops to 2.84 Ω, the flashover rate drops to 0.57/100 km/year and the insulator voltage drops to 0.99 MV when a disturbance occurs.

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Informasi Detail

Judul Seri

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No. Panggil

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Penerbit

: LPPI Universitas Ahmad Dahlan., 2022

Deskripsi Fisik

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Bahasa

English

ISBN/ISSN

2088-8708

Klasifikasi

NONE

Tipe Isi

text

Tipe Media

computer

Tipe Pembawa

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Edisi

Vol 13 No 1 Tahun 2022

Subjek

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Info Detail Spesifik

Halaman 94-106

Pernyataan Tanggungjawab

International Journal of Electrical and Computer Engineering

Informasi Lainnya

NIM

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Versi lain/terkait

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